CN100416327C - Method for fixing optical member and optical unit - Google Patents
Method for fixing optical member and optical unit Download PDFInfo
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- CN100416327C CN100416327C CNB2005100667548A CN200510066754A CN100416327C CN 100416327 C CN100416327 C CN 100416327C CN B2005100667548 A CNB2005100667548 A CN B2005100667548A CN 200510066754 A CN200510066754 A CN 200510066754A CN 100416327 C CN100416327 C CN 100416327C
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- Prior art keywords
- lens
- laser radiation
- receiving element
- optical element
- laser
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
- B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
- B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
Abstract
A method for fixing an optical member of an optical unit including the optical member and a holding member is provided. The holding member includes positioning portions for positioning the optical member. The optical member and the holding member are fixed to each other upon laser welding of a plurality of locations of the holding member other than the positioning portions.
Description
Technical field
The present invention relates to a kind of optical unit, wherein use laser optical element (such as pickup lens (pickup lens)) and receiving element is fixed to one another, the invention still further relates to a kind of method that is used for fixing optical element by laser bonding.
Background technology
The following method that is used for fixing optical element (such as lens) up to now is known.
(1) after in lens being inserted into the lens receiving element that is formed from a resin, lens is fixed in the circumference leading edge of lens receiving element by known hot ca(u)lk (thermal caulking) etc.; And
(2) use UV cure adhesive etc. that the excircle and the lens receiving element of lens are interfixed.
Unfortunately, according to method (1), caulking tools passes through the circumference leading edge of heat fused lens receiving element so that cover the circumference leading edge of lens, thereby causes the long period of ca(u)lk and the increase of installation step, therefore causes the cost that increases.In addition, owing to must use the excircle of caulking tools by heat fused lens receiving element so that the circumference leading edge of lens is fixed thereon, lens receiving element and lens are withstanding pressure inevitably, thereby causes the assembling assurance problem of the setting accuracy of lens afterwards.
In addition, according to method (2), making the UV cure adhesive in the period after standing ultraviolet ray irradiation, fluid binder flows out on the circumferential surface of lens receiving element, and when the bonding agent that flows out solidifies under the ultraviolet ray irradiation, cure adhesive assembly on every side disturbs the bonding agent that solidifies mutually with assembling afterwards, thereby causes bad operation, especially reduces optical property.In addition, gap between the excircle of fluid binder scioptics receiving element and lens flows into the lens inboard, thereby causes the assurance problem etc. of optics of lens performance.
In order to address these problems, Japanese patent unexamined discloses No.2003-123512 surely and has disclosed a kind of method, wherein, by laser bonding two kinds of resins is interfixed.More specifically, the outer lens that lens unit is made by the transparent thermoplastic resin constitutes with the shell that the thermoplastic resin that can absorb laser is made, and the sidewall of the excircle of described shell and outer lens mutually against state under by launching laser described shell and described outer lens are welded to each other from the sidewall of described outer lens.
In addition, also disclosed and be used to use laser optical element (such as plastic lens) to be fixed in the method for lens-mount that plastics make etc.For example, Japanese patent unexamined surely openly No.2004-20867 disclosed a kind of being used for by plastic lens being fixed in the method for plastic lens framework for example or plastics view-finder with laser radiation lens-mount or view-finder.
In addition, Japanese patent unexamined discloses No.2003-123506 surely and has disclosed a kind of method, wherein, be clamped at inner panel under the state of the office, butting section between outer lens and the shell, by the whole circumference of the inner panel made by the transparent thermoplastic resin with the laser radiation that comes from the outer lens sidepiece, the shell that the outer lens that will be made by the transparent thermoplastic resin and the another kind of thermoplastic resin that can absorb laser are made is welded to each other.
Summary of the invention
The present invention relates to be used for optical element is fixed in the method for receiving element.In one aspect of the invention, the method that is used for optical element is fixed in receiving element may further comprise the steps: optical element is inserted into receiving element; And pass optical element with a plurality of laser beams simultaneously basically and shine described receiving element.
The invention still further relates to the receiving element that is used to hold optical element.In another aspect of the present invention, provide and held and the receiving element by laser radiation program fixing optical element, described receiving element comprises: a plurality of localization parts, thus be suitable for contacting the described optical element in location before the laser radiation program with described optical element; And a plurality of laser radiation parts, this laser radiation is partly outstanding as to lack than described localization part, and in the laser radiation program by laser radiation, described laser radiation part did not contact with described optical element before described laser radiation program; Described localization part partly is formed on the position relative with unique plane of described optical element with described laser radiation, before described illumination procedure, described localization part makes described laser radiation part not contact with described optical element than partly outstanding more of described laser radiation more, in the laser radiation program, laser radiation partial melting and contact with optical element.
The invention still further relates to optical unit.In one aspect of the method, optical unit comprises optical element; Receiving element, described receiving element is used to hold optical element, and has one and be formed on wherein wall so that in the face of the excircle of described optical element; And be arranged on intermediary element between the wall of the excircle of described optical element and receiving element, described intermediary element comprises the thermoplastic resin that can absorb laser, therefore at least a portion intermediary element melts under the situation with laser radiation, thereby optical element is fixed on the receiving element.
From the description of the one exemplary embodiment of making, will understand other features and advantages of the present invention below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of first embodiment of the invention.
Fig. 2 is the sectional view of lens unit, shows the related method that is used for fixing lens of first embodiment.
Fig. 3 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of second embodiment of the invention.
Fig. 4 is the sectional view of lens unit, shows the related method that is used for fixing lens of second embodiment.
Fig. 5 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of third embodiment of the invention.
Fig. 6 is the sectional view of lens unit, shows the related method that is used for fixing lens of the 3rd embodiment.
Fig. 7 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of fourth embodiment of the invention.
Fig. 8 is the sectional view of lens unit, shows the related method that is used for fixing lens of the 4th embodiment.
Fig. 9 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of fifth embodiment of the invention.
Figure 10 is the sectional view of lens unit, shows the related method that is used for fixing lens of the 5th embodiment.
Figure 11 is the perspectivity sectional view that is fixed in the lens unit of lens-mount from the lens fixing means according to first embodiment that the reverse direction of laser radiation direction is seen.
Figure 12 is the perspectivity sectional view that is fixed in the lens unit of lens-mount from the lens fixing means according to second embodiment that the reverse direction of laser radiation direction is seen.
Figure 13 is the perspectivity sectional view that is fixed in the lens unit of lens-mount from the lens fixing means according to third and fourth embodiment that the reverse direction of laser radiation direction is seen.
Figure 14 is the perspectivity sectional view that is fixed in the lens unit of lens-mount from the lens fixing means according to first embodiment that the reverse direction of laser radiation direction is seen.
Figure 15 is the perspectivity sectional view of the major part of the related optical unit of sixth embodiment of the invention.
Figure 16 is the related perspectivity sectional view with major part that lens are inserted in optical unit wherein of the 6th embodiment.
Figure 17 is the perspectivity sectional view of the major part of the related optical unit of seventh embodiment of the invention.
Figure 18 is the related perspectivity sectional view with major part that lens are inserted in optical unit wherein of the 7th embodiment.
Figure 19 is the perspectivity sectional view of the major part of the related optical unit of eighth embodiment of the invention.
Figure 20 is the sectional view of the related optical unit of the 8th embodiment, shows lens receiving element wherein and has the lens that are inserted in wherein and its state of ring-type element.
Figure 21 is the perspectivity sectional view of the major part of the related optical unit of ninth embodiment of the invention.
Figure 22 is the sectional view of the related optical unit of the 9th embodiment, shows lens receiving element wherein and has the lens that are inserted in wherein and its state of ring-type element.
Embodiment
First embodiment
Fig. 1 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of first embodiment.
The related lens fixing means of first embodiment will be described below.First lens 11 are assemblied in the lens-mount 13 so that the localization part 11a of first lens 11 is resisted against on the first lens position part 13h of lens-mount 13.Then, second lens 12 are assemblied in the lens-mount 13 so that the localization part 12a of second lens 12 is resisted against on the second lens position part 13a of lens-mount 13.In this state, first and second lens 11 and 12 optical axis and imaginary axis Z1 align.Because the excircle size of each the wall 13i of lens- mount 13 and 13e is all slightly greater than the excircle size of each first and second lens 11 and 12, therefore, use above-mentioned clearance can regulate the position of each first and second lens 11 and 12 along the direction vertical with axle Z1.Therefore, can make the optical axis of each lens and axle Z1 align by some method (not shown).Shine a plurality of positions of each lens with time point with laser from the lens top.About laser radiation, can after shining first lens 11, shine second lens 12 with laser 14a with laser 14b, perhaps can shine this two lens with laser 14a and 14b simultaneously.Perhaps, fix in these two lens any one with bonding agent etc. after, another lens of available laser radiation.And, in order to strengthen constant intensity, can in the laser irradiating position that changes each lens, carry out repeatedly laser radiation.
Because most of laser has passed lens, so the major part of its energy has arrived lens-mount 13.Lens-mount 13 is made of endergonic plastics in the certain limit of optical maser wavelength.
Fig. 2 is the sectional view of lens unit, show first embodiment related be used for method by the laser radiation fixed lens.
The example stationary method of shining two bundle laser 14a and 14b simultaneously will be described below. Laser beam 14a and 14b are absorbed at the respective lens localization part 13a and the 13h place of lens-mount 13, are changed into heat energy, and make the edge of each laser radiation part be melted.The melt portions that constitutes the plastics of lens-mount 13 enters into the trickle irregular part of the lens surface of bearing part (that is, the localization part) 11a of first lens 11 and 12a, is resisted against respectively on first and second lens 11 and 12 at these part place plastics.
When laser radiation stopped, although the fast cooling and shrinking of the melt portions of plastics, at least a portion of plastics that enters into the trickle irregular part of lens surface was retained in irregular part, thereby causes interfixing of lens and lens-mount.The said lens fixed part is formed on a plurality of positions of lens position part 13a and 13h simultaneously, thereby makes do not having under the situation about tilting with respect to axle Z1 first and second lens 11 and 12 not to be fixed in lens-mount 13.
Figure 11 is the perspectivity sectional view of seeing from the reverse direction of laser radiation direction according to the lens subassembly of the lens fixing means of first embodiment assembling.
Second embodiment
Fig. 3 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of second embodiment.
The related lens fixing means of second embodiment will be described below.As shown in Figure 3, on below lens-mount 23, being resisted against the lens fixed part 23f of lens-mount 23 after, by hot ca(u)lk etc. make lens-mount 23 a part of 23g distortion and first lens 21 are fixed in lens-mount 23.
Then, second lens 22 are assemblied in the lens-mount 23 so that the localization part 22a of second lens 22 is resisted against on the second lens position part 23a of lens-mount 23.Lens-mount 23 has a plurality of laser radiation part 23b that are arranged at wherein.Although laser radiation part 23b is formed in the face of the outer peripheral corner 22b of second lens 22, the outer peripheral corner 22b of the laser radiation part 23b and second lens 22 is not in contact with one another.In this state, first and second lens 21 and 22 optical axis and imaginary axis Z1 align.Because therefore the excircle size of the wall 23e of lens-mount 23, uses this clearance slightly greater than the excircle size of second lens 22, can by with first embodiment in identical method (not shown) make the optical axis of second lens 22 and an axle Z1 align.Shine a plurality of positions of each lens with time point with laser from the lens top.The direction of illumination of laser can be parallel with the optical axis of lens or perpendicular to laser radiation part 23b.Perhaps, after with multiple laser 24a irradiation, available laser 24c shines other a plurality of laser radiation parts.
Fig. 4 is the sectional view of lens unit, show second embodiment related be used for method by the laser radiation fixed lens.
Laser 24a has passed lens, has been absorbed at the laser radiation part 23a place of lens-mount 23, has been changed into heat energy, and makes the edge of each laser radiation part be melted.Constitute the melt portions expanded by heating of the plastics of lens-mount 13, beginning contacts with the outer peripheral corner 22b of second lens 22, and the trickle irregular part that therefore enters lens surface.
When laser radiation stopped, although the fast cooling and shrinking of the melt portions of plastics, at least a portion of plastics that enters into the trickle irregular part of lens surface was retained in irregular part, thereby causes lens and lens-mount to be interfixed.Because laser radiation part 23b is formed on the position except that lens position part 23a of lens-mount 23, and lens position part 23a laser radiation, so lens position part 23a does not have temperature distortion.In addition, a plurality of laser radiation part 23b are basic simultaneously by laser 24a irradiation, thereby make do not having under the situation about tilting with respect to axle Z1 second lens 22 not to be fixed in lens-mount 23.
Figure 12 is the perspectivity sectional view of seeing from the reverse direction of laser radiation direction according to the lens subassembly of the lens fixing means of second embodiment assembling.
The 3rd embodiment
Fig. 5 is the perspectivity sectional view of the related lens unit that is used for fixing lens of the 3rd embodiment, and Fig. 6 is the sectional view of lens unit, show the 3rd embodiment related be used for method by the laser radiation fixed lens.To only describe below with second embodiment in different parts.
When the laser radiation of laser 34a stops,, thereby cause interfixing of lens and lens-mount although the fast cooling and shrinking of the melt portions of plastics enters with lean at least a portion of plastics partly of lens and is retained in the bearing part.Because laser radiation part 33b and lens position part 33a are formed on the mutually different position of lens-mount 33, and laser 34a is towards lens position part 33a emission, so lens position part 33a does not have temperature distortion.Lens-mount 33 has to be formed on the reduced thickness portions 33d at place, laser radiation part 33b rear portion than the thin mode of other parts around the laser radiation part 33b.Under situation, even after lens are fixed on the lens-mount, can carry out the contraction behavior of the melt portions of plastics apace with reduced thickness portions 33d, and lens-mount 33 kept since thickness reduce the elastic force that obtained.Because a plurality of laser radiation part 33b are basic simultaneously by laser 34a irradiation, thereby make under situation about not tilting second lens 32 are fixing with respect to axle Z1.In addition, because elastic force, lens-mount has and lens is pressed in the power on the lens position part 33a and overcomes another power such as external force such as vibration recovery lens.
Figure 13 is the perspectivity sectional view of seeing from the reverse direction of laser radiation direction according to the lens subassembly of the lens fixing means of the 3rd embodiment assembling.
The 4th embodiment
Fig. 7 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of the 4th embodiment, and Fig. 8 is the sectional view of lens unit, show the 4th embodiment related be used for method by the laser radiation fixed lens.To only describe below with the 3rd embodiment in different parts.
Lens-mount 43 has a plurality of lens position part 43a and the laser radiation surface 43b that is arranged alternately in wherein.Each laser radiation surface 43b has spherical outshot 43c formed thereon.Laser radiation surface 43b is positioned at the lower position than lens position part 43a.Be assemblied in the lens-mount 43 so that second lens 42 are resisted against under the state of lens position part 43a at second lens 42, the outshot 43c that is formed in addition on the corresponding laser radiation surface 43b can not contact with second lens 42.In addition, even when moving second lens 42 slightly so that regulating its optical axis, also can under the situation that does not influence its setting accuracy, make optical axis alignment.
Though the laser radiation surface flushes each other in the 3rd embodiment, in the 4th embodiment, only be formed on outshot 43c on the 43b of each laser radiation surface by laser radiation.Deposit at this cloth, less heat is transferred to lens position part 43a.
Outshot 43c on the corresponding laser radiation surface 43b is not limited to has spherical form, but can have the shape such as cylindrical or prismatic.
The 5th embodiment
Fig. 9 is the perspectivity sectional view of lens unit, shows the related method that is used for fixing lens of the 5th embodiment, and Figure 10 is the sectional view of lens unit, show the 5th embodiment related be used for method by the laser radiation fixed lens.To only describe below with the 4th embodiment in different parts.
Lens-mount 53 has a plurality of lens position part 53a and the laser radiation part 53b that is arranged alternately in wherein, and laser radiation part 53b has the otch that is formed on its edge and cuts away from the wall 53e of lens-mount 53.In addition, laser radiation surface 53b has outshot 53c formed thereon.Second lens 52 comprise and are used for the locating surface 52a that arranges with respect to lens-mount and in the face of the inclined-plane 52b of laser radiation part 53b.Although by the outshot 53c that is formed on the 53b of laser radiation surface with laser 54 irradiations lens are fixed in lens-mount in mode same as the previously described embodiments, because laser radiation part 53b has otch in its edge, therefore with among other embodiment compare, after laser radiation, thermal shrinkage force is easier to be applied on second lens 52 towards lens position part 53a, in addition, elastic force is easy to be applied on the laser radiation part 53b, thereby with compare among other embodiment, more effectively prevent to cause lens and lens-mount to be separated because vibration waits.
Though in above-mentioned each embodiment, shine a plurality of positions simultaneously with laser, but say that in a narrow sense described position is simultaneously not illuminated, but can for example tens arrive in the time range of hundreds of millisecond by laser radiation, as long as described time range can not cause adverse effect to the position precision of lens.
In each embodiment, when the lens that will fix are made by glass, in order to increase the weld strength of lens and plastic molting part, the surface of the welding portion of lens can be processed must the more coarse or processing (primer process) that can stand to prime than the curved surface of lens.
In addition, in each embodiment, the lens that fix can be made of plastics.
Under the situation of plastic lens, lens and lens-mount can be welded to each other so that the heat of the lens-mount that melts owing to laser radiation makes a part of plastic lens fusing and therefore chemically being bonded on the plastics that constitute lens-mount.
The element of fixing is not limited to lens, but can be such as optical elements such as clear glass, plastic plate or light filters.
The 6th embodiment
Figure 15 and Figure 16 show the optical unit in the related insertion camera of sixth embodiment of the invention.More specifically, Figure 15 is the perspectivity sectional view of the major part of optical unit, and Figure 16 is the sectional view of the major part of optical unit, shows the state that optical unit wherein is fully inserted into.
As seen in these figures, lens unit comprises: lens 101, lens 101 are formed in the optical element on the pickup device (not shown) one as the image that picks up light that will come from object, and lens 101 have to be formed on and are the depressed portion 101a in V-arrangement cross section on its external peripheral surface substantially; In order to hold lens 101 and to have the lens receiving element 102 of lens receiving unit 102a; And when as shown in Figure 16 optical unit is fully inserted into the ring-type element 103 between the lens receiving unit 102a of the depressed portion 101a of lens 101 and lens receiving element 102.The characteristic that ring-type element 103 has thermal plastic property and absorbs near infrared light in addition, is made so that get over the excircle 101b of lens 101 and be assemblied among the depressed portion 101a before lens unit inserts by having suitable flexible material.
The program that lens 101 and lens receiving element 102 is interfixed by laser bonding will be described below.
As shown in Figure 16, the lens 101 that ring-type element 103 is contained among the depressed portion 101a with basic V-arrangement cross section at first are inserted in the lens receiving element 102.Then, laser irradiating device 104 uses a plurality of positions at point-like laser 105 irradiation lens 101 edges.Deposit at this cloth, laser 105 passes lens 101, and the basic while of a plurality of positions of ring-type element 103 is shone by laser 105.Because ring-type element 103 is to be made by the above-mentioned material that absorbs near infrared light, after as mentioned above by laser 105 irradiations, ring-type element 103 produces heat, expanded by heating, is melted, welds mutually, is filled among the depressed portion 101a of lens 101 excircles with the lens receiving unit 102a of lens receiving element 102 by absorbing laser 105, and therefore tightly is fixed in lens 101.
When finishing laser radiation, and when illuminated portion is cooled, make the ring-type element 103 and the lens receiving unit 102a of lens receiving element 102 be in bonding state by welding, ring-type element 103 is to insert the depressed portion 101a that mode among the depressed portion 101a tightly is fixed in lens 101.Therefore, by welding lens 101 are fixed in lens receiving element 102, wherein depressed portion 101a is inserted between them.Therefore, even when along the direction of pulling down from lens receiving element 102 when lens 101 apply power, also in so-called inverted concave shape, form welding portion, overcome the outstanding fixed character that the power of pulling down prevents that lens 101 from separating from lens receiving element 102 thereby provide.
According to aforementioned the 6th embodiment, lens 101 have the depressed portion 101a that is arranged on its excircle place; Under situation about lens 101 being inserted in the lens receiving element 102, be assemblied among the depressed portion 101a and as the ring-type element 103 of bonding part, it is to make with the material that is different from lens receiving element 102; And a plurality of positions of ring-type element 103 are shone by laser 105, thereby by laser bonding lens 101 and lens receiving element 102 are interfixed.Owing to lens 101 and lens receiving element 102 are interfixed by laser bonding, depressed portion 101a is inserted between them, after laser bonding, these assemblies are fixed on so-called recess, overcome the outstanding fixed character that the power of pulling down prevents that lens 101 from separating from lens receiving element 102 thereby make lens unit have, so lens 101 are firmly fixed at lens receiving element 102.
Though depressed portion 101a is formed on the excircle place of lens 101 in above-mentioned the 6th embodiment, the present invention is not limited to this layout.Even be assemblied in wherein depressed portion when being formed on the inner periphery place of lens receiving element 102 when ring-type element 103, also can obtain identical advantage.In addition, although a plurality of positions of ring-type element 103 by laser radiation, irradiation position is not limited to above-mentioned layout, and ring-type element 103 also can be by the laser radiation around its whole circumference.
Those skilled in the art will understand is that lens 101 also can be made by glass or resin material.Under the situation that lens 101 are made by resin material, using under the situation of laser radiation, the ring-type element 103 of fusing makes a part of resin lens be melted, thus lens 101 and the mutual laser bonding of lens receiving element 102 quilts, and ring-type element 103 is inserted between them.Aforesaid, the depressed portion 101a of scioptics 101 carries out laser bonding, overcomes the outstanding fixed character that the power of pulling down prevents that lens from separating from the lens receiving element thereby provide in the same manner as described above.
In above-mentioned the 6th embodiment, although do not make description, can form lens to such an extent that have a rough surface about the surface of the depressed portion 101a of lens 101.Under this structure, for example when lens 101 be when making by glass material, aforementioned intermediary element is filled in the irregular part of rough surface, thereby makes lens more closely be fixed in lens receiving element 102.
In addition, lens 101 stand laser bonding under the state that is inserted into simply in the lens receiving element 102 in above-mentioned the 6th embodiment, but those of ordinary skills will understand is that, lens unit can have a kind of like this structure, wherein, and for example under the state that holds lens 101, regulate the eccentric and inclination of lens 101 by the vacuum suction tool, and, after regulating, when keeping holding state, make lens 101 experience laser bonding.During this time, because laser radiation makes ring-type element 103 expanded by heating, the depressed portion 101a experience laser bonding at the lens receiving unit 102a of lens receiving element 102 and the excircle place of lens 101 overcomes the outstanding fixed character that the power of pulling down prevents that lens from separating from the lens receiving element thereby provide in the same manner as described above.
The 7th embodiment
Figure 17 and Figure 18 show seventh embodiment of the invention related be inserted in optical unit in the camera.More specifically, Figure 17 is the perspectivity sectional view of the major part of optical unit, the sectional view of the major part of the optical unit under the state that Figure 18 is assembled fully.
As seen in these figures, optical unit comprises: lens 111, and lens 111 are formed in the optical element on the pickup device (not shown) one as the image that picks up light that will come from object; And lens receiving element 112.Lens 111 have the depressed portion 111a that is formed on its external peripheral surface, and described depressed portion 111a has the cross section of basic V-arrangement.To describe after a while, the lens receiving element 112 that is used to hold lens 111 is made by absorbing laser (near infrared light) 114 and having thermoplastic material, and have outstanding and a plurality of lens receiving unit 112a substantially along the circumferential direction uniformly-spaced to form along optical axis direction, also has radially outstanding outshot 112b in addition, each top that all is formed on each lens receiving unit 112a is sentenced and is convenient to be assemblied among the excircle depressed portion 111a of lens 111, as shown in Figure 18.In addition, outshot 112b be formed elastically deformable so that outshot can get over excircle 111b (seeing Figure 17) make a concerted effort to be inserted in the lens receiving element so that be press-fitted by so-called light.
As will be described later, the 113 emission near infrared lights 114 of the laser irradiating device shown in Figure 18.
The program that lens 111 and lens receiving element 112 is interfixed by laser bonding will be described below.
As shown in Figure 18, lens 111 at first are inserted in the lens receiving element 112.Then, laser irradiating device 113 uses a plurality of positions at point-like laser 114 irradiation lens 111 edges.Deposit at this cloth, laser 114 passes lens 111, and makes the basic while of a plurality of outshot 112b of lens receiving element 112 be shone by laser 114.Because the outshot 112b by the lens receiving element 112 of above-mentioned laser 114 irradiations is made by the above-mentioned material that absorbs near infrared light, so outshot 112b is by absorbing the depressed portion 111a that laser 114 produces heat, expanded by heating, is melted, is filled into and therefore tightly be fixed in lens 111.
When finishing laser radiation, and illuminated portion is when being cooled, and the fusing outshot 112b of lens receiving element 112 is cured under the state of the depressed portion 111a that tightly is fixed in lens 111.Therefore, owing to lens 111 are fixed in lens receiving element 112 by welding, wherein depressed portion 111a is inserted between them, therefore, even when along the direction of pulling down from lens receiving element 112 when lens 111 apply power, in so-called inverted concave shape, form under the situation of welding portion, provide to overcome the outstanding fixed character that the power of pulling down prevents that lens from separating from the lens receiving element.
According to the 7th embodiment, lens 111 have the depressed portion 111a that is arranged on its excircle place; Under situation about lens 111 being inserted in the lens receiving element 112, be assemblied among the depressed portion 111a and as the outshot 112b and the 112 whole formation of lens receiving element of bonding part; And a plurality of outshot 112b are shone by laser 114, thereby by laser bonding lens 111 and lens receiving element 112 are interfixed.Correspondingly, owing to lens 111 and lens receiving element 112 are interfixed by laser bonding, depressed portion 111a is inserted between them, therefore after laser bonding, these assemblies are fixed on so-called recess, overcome the outstanding fixed character that the power of pulling down prevents that lens 111 from separating from lens receiving element 112 thereby make lens unit have, so lens 111 are firmly fixed at lens receiving element 112.
Those skilled in the art will understand is that aforementioned lens 111 also can be made by glass or resin material.Under the situation that lens 111 are made by resin material, using under the situation of laser radiation, the outshot 112b of fusing makes a part of plastic lens melt, and lens 111 and the mutual laser bonding of lens receiving element 112 quilts, the depressed portion 111a of lens 111 is inserted between them as mentioned above, overcomes the outstanding fixed character that the power of pulling down prevents that lens from separating from the lens receiving element thereby provide in the same manner as described above.
In the 7th embodiment, though lens 111 have the depressed portion 111a that is formed on its excircle place, and lens receiving element 112 has formed thereon and is assemblied in the outshot 112b that is used as the bonding part among the depressed portion 111a, but the present invention is not limited to this layout.Even have the depressed portion that is formed on its excircle place when lens 111, and lens receiving element 112 have be formed at wherein be used for described depressed portion is assemblied in wherein depressed portion, also can realize identical advantage.
Although do not make description, lens can be formed to such an extent that have a rough surface about the surface of the depressed portion 111a of lens 111.Under this structure, for example when lens 111 be when making by glass material, aforementioned intermediary element is filled in the irregular part of rough surface, thereby makes lens 111 more closely be fixed in lens receiving element 112.
In addition, though lens 111 stand laser bonding under the state that is inserted into simply in the lens receiving element 112 in the 7th embodiment, but those of ordinary skills will understand is that, lens unit can have a kind of like this structure, wherein, and for example under the state that holds lens 111, regulate the eccentric and inclination of lens 111 by the vacuum suction tool, and, after regulating, when keeping holding state, make lens 111 experience laser bonding.During this time, because laser radiation makes outshot 112b expanded by heating, the depressed portion 111a at the outshot 112b of lens receiving element 112 and the excircle place of lens 111 is by laser bonding mutually, thus with above-mentioned the 6th embodiment in identical mode provide and overcome the outstanding fixed character that the power of pulling down prevents that lens from separating from the lens receiving element.
Although the lens and the lens receiving element that are included in the pickup optical system are used among the 6th and the 7th embodiment, but the present invention is not limited to the fixing means that uses these assemblies and is applicable to such exemplary method, wherein is fixed in receiving element as the light filter of optical element or as neutral density (ND) optical filter in order to the element of regulating light quantity.And, it will be appreciated by those skilled in the art that even when fixing means was different from previous embodiment or be used for fixing those of above-mentioned optical element, the present invention was applicable to the fixing means of any kind, just passable as long as it satisfies spirit of the present invention.
The 8th embodiment
Figure 19 is the perspectivity sectional view of the major part of the related optical unit of eighth embodiment of the invention.Lens unit comprises: lens 201, and lens 201 are formed in the optical element on the pickup device (not shown) one as the image that picks up light that will come from object; In order to hold the lens receiving element 202 of lens 201; And under being inserted into situation in the lens receiving element, lens are inserted in ring-type element 203 between lens 201 and the lens receiving element 202.Ring-type element is made by the material of shielding visible light and as the optics barrier film, be used for shielding remove pick up light and from ring-type element on every side mechanical component and the light the harmful light that reflects of those not shown assemblies.In addition, ring-type element also has the characteristic of thermoplastic characteristics and absorption near infrared light.
Figure 20 is that lens 201 and ring-type element 203 are inserted into the sectional view of the major part of the optical unit under the state of lens receiving element 202 therein.As will be described later, when laser irradiating device 204 emission near infrared lights, ring-type element 203 is melted so that lens 201 are fixed in lens receiving element 202.
The lens fixing means related according to present embodiment, by laser bonding that lens 201 and lens receiving element 202 is fixed to one another in the following sequence.
Aforesaid, lens 201 are inserted under the state that is inserted with ring-type element 203 in the lens receiving element 202 and between them therein, the point-like laser 205 of emission at first passes lens 201 from laser irradiating device 204, be positioned at then on the circumference and except that three knob 203a approximately and these three knob 203a have half phase differential three positions of ring-type element 203, more particularly, basic simultaneously by laser 205 irradiations among Figure 19 by three positions shown in the Reference numeral 203b (not shown in the drawings one of them).Aforesaid, owing to what made by the material that can absorb near infrared light, under the situation that absorbs point-like laser, ring-type element 203 produces heats and is melted.During this time, ring-type element 203 expanded by heating of fusing so that be filled in lens 201 with lens receiving element 202 between above-mentioned gap in, thereby the ring-type element 203 of fusing closely is fixed in the carrying plane 201a of lens 201 and make lens receiving element 202 melt so that these two assemblies are welded to each other.Under this stage, finished the program of laser radiation.
When having finished laser radiation and having begun the cooling of illumination module, although ring-type element 203 shrinks owing to cooling off with the welding portion of lens receiving element, because the welding portion of ring-type element 203, lens receiving element 202 and lens 201 is formed a unit by welding by integral body; Therefore, welding portion can not shrink and the corresponding amount in above-mentioned gap.Therefore, produced power owing to be crushed on the contraction of the direction (the A direction shown in Figure 20) on the outshot 202a of lens receiving element 202 along the carrying plane 201a of lens 201 wherein, and, after laser bonding, described try hard to keep hold so that mutually the carrying plane 201a of moulded lens 201 and lens receiving element 202 against outshot 202a, thereby lens 201 accurately are fixed in lens receiving element 202.
In the above-described embodiments, when lens 201 and lens receiving element 202 are welded to each other under with the situation that is inserted with ring-type element 203 between them, make and maintain because the power that contraction movement produced that the welding portion of ring-type element 203 and lens receiving element 202 causes owing to cooling, with the carrying plane 201a of lens 201 be pressed in lens receiving element 202 on outshot 202a, produce the another kind of power that lens 201 move that radially makes.Therefore, those skilled in the art will understand is that lens 201 can stand to regulate (such as so-called eccentric adjusting), so that guarantee its optical property.
In addition, in the above-described embodiments, though laser radiation is applied in three positions, but irradiation position is not limited to above-mentioned layout, and can arbitrarily set the quantity of irradiation position and position, as long as these positions are inconsistent just passable with the knob 203a of at least three positions that are formed on ring-type element 203.
Those skilled in the art will understand is that the aforementioned lens of being made by glass or resin material do not deviate from spirit of the present invention.Under the situation that lens are made by resin material, on the basis of laser radiation, the intermediary element of fusing makes the part of resin lens melt, thereby makes lens and lens receiving element by mutual laser bonding, has intermediary element between them.
Although do not make description, carrying plane 201a can be formed comparatively coarse about the surface of the carrying plane 201a of lens 201.Under this structure, for example when lens 201 be when making by glass material, aforementioned intermediary element is filled in the irregular part of rough surface, thereby makes lens 201 more closely be fixed in lens receiving element 202.
The 9th embodiment
Figure 21 is the perspectivity sectional view of the major part of the related optical unit of ninth embodiment of the invention.Lens unit comprises: lens 206, and lens 206 are formed in the optical element on the pickup device (not shown) one as the image that picks up light that will come from object; In order to hold the lens receiving element 207 of lens 206; And have basic for circular cross section part and as the ring-type element 208 of intermediary element, described ring-type element 208 is inserted in the gap that is produced when inserting lens, and this gap is created between the lens abutment surface 207a of the inclined-plane 206b at place, bottom of the excircle that is formed at lens 206 and lens receiving element 207.In the present embodiment, 208 ring-type elements have the characteristic of thermoplastic characteristics and absorption near infrared light.
Figure 22 is the sectional view of the major part of optical unit, shows its state under the state that wherein lens 206 and ring-type element 208 are inserted into lens receiving element 207.As shown in FIG., ring-type element 208 is inserted in the gap that is produced between the lens abutment surface 207a of inclined-plane 206b that place, lens 206 excircles bottoms forms and lens receiving element 207.During this time, ring-type element 208 has minim gap with respect to inclined-plane 206b and abutment surface 207a.As described later, when the 209 emission near infrared lights of the laser irradiating device shown in the figure, ring-type element 208 is melted, thereby lens are fixed in the lens receiving element.
The lens fixing means related according to present embodiment, by laser bonding that lens 206 and lens receiving element 207 is fixed to one another in the following sequence in basic identical mode with first embodiment.
As shown in Figure 22, lens 206 and ring-type element 208 are inserted under the state of lens receiving element 207 therein, the point-like laser 210 of emission at first passes lens 206 from laser irradiating device 209, and a plurality of positions, more particularly, basic simultaneously by laser radiation by shown in the Reference numeral 208a among Figure 21 with almost equal three positions that are located at interval at the ring-type element 208 of circumferencial direction (not shown in the drawings one of them).
Aforesaid, owing to be to be made by the material that can absorb near infrared light, under the situation that absorbs point-like laser, the ring-type element 208 that stands laser radiation produces heats and is melted.During this time, ring-type element 208 expanded by heating of fusing so that be filled in the gap between the lens abutment surface 207a of inclined-plane 206b that place, lens 206 excircles bottoms forms and lens receiving element 207, be tightly fixed to the lens excircle the place, bottom inclined-plane 206b and make lens receiving element 207 melt.Under this stage, finished the program of laser radiation.
When having finished laser radiation and having begun the cooling of illumination module, although ring-type element 208 shrinks owing to cooling off with the welding portion of lens receiving element, because the welding portion of ring-type element 208, lens receiving element 207 and lens 206 is formed a unit by welding by integral body, therefore, welding portion can not shrink and the corresponding amount in above-mentioned gap.Therefore, produced power owing to be crushed on the contraction of the direction (the B direction shown in Figure 22) on the outshot 207a of lens receiving element 207 along the carrying plane 206a of lens 206 wherein, and, after laser bonding, maintenance is the power of suppressing mutually against outshot 207a of the carrying plane 206a of lens 206 and lens receiving element 207, thereby lens 206 accurately are fixed in lens receiving element 207.
In the 8th and the 9th embodiment, when lens 206 and lens receiving element 207 are welded to each other under with the situation that is inserted with ring-type element 208 between them, make and maintain because the power that contraction movement produced that the welding portion cooling of ring-type element 208 and lens receiving element 207 causes, with the carrying plane 206a of lens 206 be pressed in lens receiving element 207 on outshot 207a, produce the another kind of power that lens 206 move that radially makes.Therefore, those skilled in the art will understand is that lens 206 can stand to regulate (such as so-called eccentric adjusting), so that guarantee its optical property.
In addition, those skilled in the art will understand is that, in addition when the lens shown in the 8th and the 9th embodiment be by glass or resin material make the time, described lens do not deviate from spirit of the present invention.Under the situation that lens are made by resin material, on the basis of laser radiation, the intermediary element of fusing makes the part of resin lens melt, thereby makes lens and lens receiving element by mutual laser bonding, has intermediary element between them.
Although do not make description, lens 206b can be formed comparatively coarse about the surface of the inclined-plane 206b at the place, bottom of the excircle that is formed on lens 206.Under this structure, for example when lens 206 be when making by glass material, aforementioned intermediary element is filled in the irregular part of rough surface, thereby makes lens 206 more closely be fixed in the lens receiving element.
In the 8th and the 9th embodiment, though laser radiation is applied in three positions, irradiation position is not limited to above-mentioned layout.
In addition, although in the 8th and the 9th embodiment, used the lens and the lens receiving element that are included in the pickup optical system, but the present invention is not limited to the fixing means that uses these assemblies and is applicable to such method, for example, wherein as the light filter of optical element or be fixed in the method for receiving element as neutral density (ND) optical filter in order to the element of regulating light quantity.And, those of ordinary skills will understand is that, even when fixing means was different from aforementioned two embodiment or is used for fixing those methods of above-mentioned optical element, the present invention was applicable to the fixing means of any kind, and is just passable as long as it satisfies spirit of the present invention.
In addition, about be used for by laser bonding will be for example the fixing means that interfixes of pickup lens and the receiving element that is used to hold pickup lens, according to each the 8th and the 9th embodiment, have under the state that is inserted in the intermediary element between them at these assemblies, lens and receiving element are had thermoplastic characteristics by laser bonding.During this time, intermediary element is positioned to and is not arranged in the plane that limits lens and receiving element along optical axis direction, and is set to such an extent that have a minim gap when inserting.Under this structure, when laser bonding, the intermediary element expanded by heating is so that fill the gap, and welds together with the lens receiving element, and then welds together with lens.Although make the welding portion of intermediary element and lens receiving element shrink by cooling after welding, because intermediary element, lens receiving element and lens are combined into a unit by integral body, and these assemblies can not shrink and the corresponding amount of aforementioned gap.Therefore, stress remains in the lens so that lens are pressed on the receiving element, thereby obtains accurate and reliable lens unit.
Deposit at this cloth, because heat that laser bonding produced can not influence optical element after the laser bonding and the abutment surface between the receiving element, thus fixing optical element accurately.
In addition, be inserted in intermediary element between optical element and the receiving element and be positioned to and when inserting, between these assemblies, have the gap and be to make by the thermoplastic that can absorb near infrared light, thus fixing optical element accurately.
Though described the present invention with reference to one exemplary embodiment, it should be understood that the present invention is not limited to disclosed embodiment.In contrast, the present invention trends towards comprising spirit and interior various corrections and the equivalent arrangement of protection domain that is included in claims.The scope of following claim should be according to explaining the most widely, thereby can comprise all described corrections and equivalent construction and function.
Claims (11)
1. method that is used for optical element is fixed in receiving element may further comprise the steps:
Optical element is inserted in the receiving element, this receiving element comprises a plurality of contact portions and a plurality of laser radiation part, and wherein this inserting step comprises and optical element being inserted in the receiving element so that optical element contacts with described a plurality of contact portions of receiving element and optical element does not divide with described a plurality of laser irradiating parts of receiving element and contacts; And
Basically simultaneously with the described receiving element of a plurality of laser beam irradiations so that laser beam passes described optical element, wherein this irradiating step comprises a plurality of laser radiation parts of using the laser beam irradiation receiving element by making laser beam pass optical element substantially simultaneously, and described laser beam is not shone described a plurality of contact portions of described receiving element.
2. according to the described method that is used for fixing optical element of claim 1, it is characterized in that described a plurality of contact portions are partly more more outstanding than described a plurality of laser radiations, and
Wherein, described irradiating step comprises with laser beam and melts described a plurality of laser radiation part so that contact with described optical element.
3. according to the described method that is used for fixing optical element of claim 1, it is characterized in that described a plurality of contact portions are partly more more outstanding than described a plurality of laser radiations, and
Wherein, when in inserting step, being inserted into described optical element in the described receiving element, between described a plurality of laser radiation parts and described optical element, be limited with a clearance, and
Wherein, described irradiating step comprises with described laser beam and melts described a plurality of laser radiation part so that make that described clearance is littler.
4. according to the described method that is used for fixing optical element of claim 1, it is characterized in that each in described a plurality of laser radiation parts all comprises local outshot, and
Wherein, when being inserted into described optical element in the receiving element in inserting step, described local outshot contacts with described optical element; And
Wherein, described irradiating step comprises with described laser beam and melts described local outshot so that contact with described optical element.
5. according to the described method that is used for fixing optical element of claim 1, it is characterized in that, described a plurality of laser radiation part has reduced thickness portions in surface thereafter, so that described laser radiation partly has than the bigger elasticity of described a plurality of contact portions.
6. according to the described method that is used for fixing optical element of claim 1, it is characterized in that described a plurality of laser radiations partly have the otch around its formation, so that described laser radiation partly has than the bigger elasticity of described a plurality of contact portions.
7. hold and the receiving element by laser radiation program fixing optical element, described receiving element comprises:
A plurality of localization parts, thus be suitable for contacting the described optical element in location before the laser radiation program with described optical element; And
A plurality of laser radiation parts, this laser radiation are partly outstanding as to lack than described localization part, and in the laser radiation program by laser radiation, described laser radiation part did not contact with described optical element before described laser radiation program;
Described localization part partly is formed on the position relative with unique plane of described optical element with described laser radiation, before described illumination procedure, described localization part makes described laser radiation part not contact with described optical element than partly outstanding more of described laser radiation more, in the laser radiation program, laser radiation partial melting and contact with optical element.
8. according to the described receiving element of claim 7, it is characterized in that, described laser radiation part is formed with at least one projection in its surface, and this projection is higher unlike localization part, and described projection does not contact with optical element before also not by laser radiation.
9. according to the described receiving element of claim 7, it is characterized in that described laser irradiating part proportion by subtraction localization part is thinner.
10. according to the described receiving element of claim 7, it is characterized in that described laser radiation part all has reduced thickness portions in surface thereafter.
11., it is characterized in that described laser radiation partly has the otch around its formation according to the described receiving element of claim 7.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP132602/2004 | 2004-04-28 | ||
| JP132601/2004 | 2004-04-28 | ||
| JP2004132601A JP4566613B2 (en) | 2004-04-28 | 2004-04-28 | Lens fixing method |
| JP163922/2004 | 2004-06-02 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810009461 Division CN101290386B (en) | 2004-04-28 | 2005-04-27 | Method for fixing optical member and optical unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1721901A CN1721901A (en) | 2006-01-18 |
| CN100416327C true CN100416327C (en) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810009461 Expired - Fee Related CN101290386B (en) | 2004-04-28 | 2005-04-27 | Method for fixing optical member and optical unit |
| CNB2005100667548A Expired - Fee Related CN100416327C (en) | 2004-04-28 | 2005-04-27 | Method for fixing optical member and optical unit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810009461 Expired - Fee Related CN101290386B (en) | 2004-04-28 | 2005-04-27 | Method for fixing optical member and optical unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4566613B2 (en) |
| CN (2) | CN101290386B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006064876A1 (en) * | 2004-12-17 | 2006-06-22 | Matsushita Electric Industrial Co., Ltd. | Optical unit and method for manufacturing same |
| JP2006276828A (en) * | 2005-03-02 | 2006-10-12 | Nikon Corp | Optical module and manufacturing method for the same |
| JP5127171B2 (en) * | 2006-07-10 | 2013-01-23 | キヤノン株式会社 | OPTICAL DEVICE AND OPTICAL DEVICE MANUFACTURING METHOD |
| JP2009116966A (en) | 2007-11-07 | 2009-05-28 | Hitachi Media Electoronics Co Ltd | Optical pickup device |
| JP5087457B2 (en) * | 2008-04-09 | 2012-12-05 | リコー光学株式会社 | Lens fixing method and lens unit |
| DE102008048333B4 (en) * | 2008-09-22 | 2018-12-27 | Pentacon Gmbh Foto- Und Feinwerktechnik | Molding for optical purposes and related manufacturing process |
| JP2010139626A (en) | 2008-12-10 | 2010-06-24 | Tamron Co Ltd | Optical apparatus, imaging apparatus, and manufacturing method for optical apparatus |
| JP2010243619A (en) * | 2009-04-02 | 2010-10-28 | Tamron Co Ltd | Optical apparatus, imaging apparatus and manufacturing method of optical apparatus |
| CN103687368B (en) * | 2012-08-30 | 2017-12-22 | 深圳富泰宏精密工业有限公司 | Safeguard structure and the electronic installation with the safeguard structure |
| CN105283789A (en) * | 2013-02-13 | 2016-01-27 | 齐戈股份有限公司 | Monolithic optical components with integrated flexures |
| FR3026343B1 (en) * | 2014-09-30 | 2016-10-28 | Valeo Vision | ASSEMBLY OF TWO PIECES OF A LUMINOUS DEVICE BY WELDING MIRROR THROUGH RIBBONS |
| JP6566760B2 (en) * | 2015-07-22 | 2019-08-28 | キヤノン株式会社 | Optical component, method of manufacturing optical component, and camera |
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| US4737017A (en) * | 1983-10-25 | 1988-04-12 | Minolta Camera | Optical element holding mechanism and method of manufacturing the same |
| US6157501A (en) * | 1998-06-08 | 2000-12-05 | Olympus Optical Co., Ltd. | Lens holding structure |
| US6239925B1 (en) * | 1999-09-03 | 2001-05-29 | Key Plastics, Inc. | Instrument cluster lens assembly and method of making |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4566613B2 (en) | 2010-10-20 |
| CN101290386A (en) | 2008-10-22 |
| CN101290386B (en) | 2013-04-24 |
| CN1721901A (en) | 2006-01-18 |
| JP2005316044A (en) | 2005-11-10 |
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