CA2025589A1 - Connector for an optical fibre - Google Patents
Connector for an optical fibreInfo
- Publication number
- CA2025589A1 CA2025589A1 CA002025589A CA2025589A CA2025589A1 CA 2025589 A1 CA2025589 A1 CA 2025589A1 CA 002025589 A CA002025589 A CA 002025589A CA 2025589 A CA2025589 A CA 2025589A CA 2025589 A1 CA2025589 A1 CA 2025589A1
- Authority
- CA
- Canada
- Prior art keywords
- connector
- inclination
- connector pin
- face
- edge area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000013307 optical fiber Substances 0.000 title claims description 15
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 238000007373 indentation Methods 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910021652 non-ferrous alloy Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
- G02B6/3822—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with beveled fibre ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/22—Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B19/226—Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground of the ends of optical fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3854—Ferrules characterised by materials
Abstract
Abstract The inclination (6) of the fibre end surface (4) is arranged in such a way that an edge area (7), which extends through 360 degrees, remains around the inclination. The inclination is separated from the edge area by an annular shaped indentation. In this way the connector pin has on its face (5) a constantly unchanging limit-stop surface in each desired relative position.
(Figure 3)
(Figure 3)
Description
~ ~3 $~
31. 07 . 90/ P DI026 Diamond SA, 6616 Losone Connector for an optical fibre The invention concerns a connector for an optical fibre according to the preamble of claim I. With optical plug-in connectors, a Fresnel reflection occurs on the fibre end surfaces of the optical fibres to be connected to one another, whereby a return of light into the transmitting fibre can be the result. This light, which is reflected back into the transmitter, adversely effects the quality of the transmission system and is therefore most undesireable. For this reason the fibre end surface is inclined, in order to achieve a return loss which is as high as possible. The reflected l-ght beams are in this way only transmitted back to a slight extent, whilst the higher proportion are radiated away to the outside of the optical fibre. The theoretical basis for calculation of the largest possible return loss is known to the expert.
With a few known connectors, the face is inclined flat through grinding in~ such a way that the fibre end surfacej even with the largest possible eccentr~city of the optical fibre, will be completely included within the area of the inclination. This form of inclination has, however, the disadvantage that only a section is left over as a face, which is arranged at rightangles to the middle axis of the connector pin. In principle, the connector pin has the form of a cylinder which has been cut off obliquely. Since the face of the conne tor simultaneously forms the contact surface for both of the opposing connector pins, this type of con~iguration is very disadvantageous.
With the extremely small diameter of the connector pins, for example 2.5 mm, a very small contact surface remains between both the coupled connector pins. Just a slight slanting of the remaining contact surfaces can strongly in~luence the transmission loss.
, .~:
2 ~ 3 A method of grinding connector end surfaces has been made known through JP-A-57/156~59, with which, in order to form an inclination, a tool with a spherical grinding surface is led against the face, whereby the rotating axis of the tool runs eccentrically to the axis of the fibre.
In this way the contact surface on the connector face can indeed be somewhat enlarged, since, for example, it runs slightly crescent shaped. A clean boundary between the inclination and the remairLing contact surface is at the same time no longer ensured. Depending on the materi~l and the quality of the tool, the smallest faults or burrs can occur which adversely effect the flatness of the contact surface and with that the quality of the plug-in connection. The grinding procedure becomes problematic especi~lly if the connector pin also exhibits two r~ifferent materials on the face, for example an outer ferrule of hard metal and a core of a flexible alloy.
It is therefore a purpose of the invention to create a connector of thetype mentioned in the introduction, whose face forms an optimum limit-stop surface for the plug-in connec~ion with undiminished high return loss. This task is, according to the invention, ful~illed with a connector which exhibits the characteristics of claim 1.
Owing to the fact that the inc]ination includes just the fibre end surface and the section of the face im mediately surrounding it, an annular shaped, uninterrupted edge area remains around the optical fibre. This outer edge area possesses the same, if not better, limit-stop properties as a circular face without inclination. In any desired relative position of two opposed, coupled connector pins, the limit-stop is maint~ined and the total contacting surface area remains constant.
Thus, for example, two connector pins with inclined fibres could also be rotated relative to one another for intentional influence of the loss, whereby rotation through 360 degrees is possible without d;ffl~ ulty .
With known connectors th~s would be problematic since the total contacting surface changes constantly, and with that the risk of incorrect positioning or damage also increases.
"~ ' . .' ~ - - -- ~ .
!r~; .?
Since ~he inclination is separated from the outer edge area by an annular indentation, inclined grinding can be better applied. The surface to be worked upon remains restricted to a minimum and any irregularities in the edge area of the grinding cannot influence the flatness of the edge area on the connector face.
If the connector pin comprises an outer ferrule of relatively hard material and a core of softer material, it is particularly advantageous if the edge area, which is not inclined, is formed by the face of the outer ferrule. In this way the hard material of the outer ferrule does not need to be further worked on in any way. The inclination lies only in the area of the softer, and therefore better to work on, core part.
Depending on the grinding tool employed, the inclination can run flat or cylindrically, or respectively ball-shaped with an inward curvature.
Apart from that, the optical fibre can - as is known - be fixed paraUel to the middle axis or inclined to the middle axis of the connector pin.
Versions of the invention æe depicted in the drawings and are subsequently more exactly described. Namely:
Figure 1 a highly enlarged cross section through a connector pin according to the invention, with cy]indrical grinding, Figure 2 a view of the connector pin according to figure ~, turned through 90 degrees, Figure 3 a plan view of a connector pin according to figure 2, Figure 4 a cross section through a modified version of a connector pin according to the invention with a flat grinding, and Figure 5 a cross section through a further version with spherical grinding .
. : :. .
, :,:
. :
. . :. . .
In the figures 1 to 3 a connector l according to the invention is depicted, whereby, in spite of the inclination of the fibre end surface 4, a surrounding edge area 7 remains which extends through 360 degrees. The connector pin 3 is constructed in two parts in a known way and has an outer ferrule 9 which, for example, can be made from hard metal or a ceramic material or hardened steel. The core ] 0 of the connector pin is made of a softer material, for example a non-ferrous alloy, and the optical fibre 2 can, after insertion into the optimum posi~ion, be fastened in a known way by stamping. The optical axis 12 of the optical fibre runs parallel to the middle axis of the connector pin 3. An annular indentation 8 is provided on the face 5 which, however, does not include the outer ferrule 9. The indentation can be previously cast into the core 10 or can be subsequently produced through turning. A section 16 remains around the fibre end surface 4 so that, even with the maximum permitted eccentricity of the optical fibre, the fibre end surface 4 is always surrounded by the material 10 of the core part. The diameter of the connector pin 3 lies within the range between 2 mm to 4mm. -A surrounding chamfer 11 facilitates the connection procedure.
The inclination of the fibre end surface 4 and the section 16 ensues in this version with a grinding disk 14, which is rotated about the grinding disk axis 19 in the direction of the arrow x. The cy]indrical grinding disk possesses a radius r, so that the inclination runs cylindrically with an inward curvature. The angle between the grinding disk axis l 9 and the optical axis 12 can be ascertained through calculation, so that the desired return loss can be achieved with consideration of a~l possible parameters. The inclination on the fibre end surface 4 causes a deflection of the light beam in the deflection axis 18, relative to the optical axis 12 of the optical fibre.
The hard outer ferrule 9 is completely untouched by the inclined grinding. The cylindrical curvature of the inclination can be ignored withoùt further consequence, since the diameter of the optical i~ibre is extremely small~
-.:. .
,. : : ; ' S ~ 3 ~ ~ 3 In figure 4, an alternative version is depicted in which the connector pin is, however, similarly constructed to the version according to figures 1 to 3. The optical axis 12 of the optical fibre is, however, arranged to be inclined to the middle axis 13 of the connector pin. As opposed to the previously described version, the inclination does not, however, run with a curvature, but is flat. The flat inclination can be achieved through the use of a cup-wheel ] 5 which is rotated in the direction of the arrow y around the grinding disk axis 20. The grinding surface 17 on the cup-wheel thus produces the inclination.
Here also, an edge area 7 remains around the inclination which extends through 360 degrees. Whatever relative position the optical axis 12 exhibits depends considerably on the purpose for which the connector will be used.
The inclination of the fibre end surface 4 can be selected in such a way that the light beam exits parallel to the connector axis.
With this arrangement of the optical fibre, the exiting light can be im mediately fed into a lens system .
With the version according to figure 5, the optical axis 12 of the fibres 2 and the connector axis 13 are once again parallel. The inclination 6 is, however, formed ball-shaped and is produced by a ball-shaped grinding head 21 that is r~ated around the axis 20 in the direction of the arrow z. The axis 20 is arranged to be offset in relation to the axes 12/13. The concave curvature on the fibre end surface can in practice also be ignored. Finally, not depicted here but likewise conceivab]e would be the application of an inclination by means of a grinding disk whose rotational axis runs at rightangles to the connector axis 13, but is, however, offset in relation to it. The result would likewise be a cylindrical inclination, but with a displaced centre.
::
31. 07 . 90/ P DI026 Diamond SA, 6616 Losone Connector for an optical fibre The invention concerns a connector for an optical fibre according to the preamble of claim I. With optical plug-in connectors, a Fresnel reflection occurs on the fibre end surfaces of the optical fibres to be connected to one another, whereby a return of light into the transmitting fibre can be the result. This light, which is reflected back into the transmitter, adversely effects the quality of the transmission system and is therefore most undesireable. For this reason the fibre end surface is inclined, in order to achieve a return loss which is as high as possible. The reflected l-ght beams are in this way only transmitted back to a slight extent, whilst the higher proportion are radiated away to the outside of the optical fibre. The theoretical basis for calculation of the largest possible return loss is known to the expert.
With a few known connectors, the face is inclined flat through grinding in~ such a way that the fibre end surfacej even with the largest possible eccentr~city of the optical fibre, will be completely included within the area of the inclination. This form of inclination has, however, the disadvantage that only a section is left over as a face, which is arranged at rightangles to the middle axis of the connector pin. In principle, the connector pin has the form of a cylinder which has been cut off obliquely. Since the face of the conne tor simultaneously forms the contact surface for both of the opposing connector pins, this type of con~iguration is very disadvantageous.
With the extremely small diameter of the connector pins, for example 2.5 mm, a very small contact surface remains between both the coupled connector pins. Just a slight slanting of the remaining contact surfaces can strongly in~luence the transmission loss.
, .~:
2 ~ 3 A method of grinding connector end surfaces has been made known through JP-A-57/156~59, with which, in order to form an inclination, a tool with a spherical grinding surface is led against the face, whereby the rotating axis of the tool runs eccentrically to the axis of the fibre.
In this way the contact surface on the connector face can indeed be somewhat enlarged, since, for example, it runs slightly crescent shaped. A clean boundary between the inclination and the remairLing contact surface is at the same time no longer ensured. Depending on the materi~l and the quality of the tool, the smallest faults or burrs can occur which adversely effect the flatness of the contact surface and with that the quality of the plug-in connection. The grinding procedure becomes problematic especi~lly if the connector pin also exhibits two r~ifferent materials on the face, for example an outer ferrule of hard metal and a core of a flexible alloy.
It is therefore a purpose of the invention to create a connector of thetype mentioned in the introduction, whose face forms an optimum limit-stop surface for the plug-in connec~ion with undiminished high return loss. This task is, according to the invention, ful~illed with a connector which exhibits the characteristics of claim 1.
Owing to the fact that the inc]ination includes just the fibre end surface and the section of the face im mediately surrounding it, an annular shaped, uninterrupted edge area remains around the optical fibre. This outer edge area possesses the same, if not better, limit-stop properties as a circular face without inclination. In any desired relative position of two opposed, coupled connector pins, the limit-stop is maint~ined and the total contacting surface area remains constant.
Thus, for example, two connector pins with inclined fibres could also be rotated relative to one another for intentional influence of the loss, whereby rotation through 360 degrees is possible without d;ffl~ ulty .
With known connectors th~s would be problematic since the total contacting surface changes constantly, and with that the risk of incorrect positioning or damage also increases.
"~ ' . .' ~ - - -- ~ .
!r~; .?
Since ~he inclination is separated from the outer edge area by an annular indentation, inclined grinding can be better applied. The surface to be worked upon remains restricted to a minimum and any irregularities in the edge area of the grinding cannot influence the flatness of the edge area on the connector face.
If the connector pin comprises an outer ferrule of relatively hard material and a core of softer material, it is particularly advantageous if the edge area, which is not inclined, is formed by the face of the outer ferrule. In this way the hard material of the outer ferrule does not need to be further worked on in any way. The inclination lies only in the area of the softer, and therefore better to work on, core part.
Depending on the grinding tool employed, the inclination can run flat or cylindrically, or respectively ball-shaped with an inward curvature.
Apart from that, the optical fibre can - as is known - be fixed paraUel to the middle axis or inclined to the middle axis of the connector pin.
Versions of the invention æe depicted in the drawings and are subsequently more exactly described. Namely:
Figure 1 a highly enlarged cross section through a connector pin according to the invention, with cy]indrical grinding, Figure 2 a view of the connector pin according to figure ~, turned through 90 degrees, Figure 3 a plan view of a connector pin according to figure 2, Figure 4 a cross section through a modified version of a connector pin according to the invention with a flat grinding, and Figure 5 a cross section through a further version with spherical grinding .
. : :. .
, :,:
. :
. . :. . .
In the figures 1 to 3 a connector l according to the invention is depicted, whereby, in spite of the inclination of the fibre end surface 4, a surrounding edge area 7 remains which extends through 360 degrees. The connector pin 3 is constructed in two parts in a known way and has an outer ferrule 9 which, for example, can be made from hard metal or a ceramic material or hardened steel. The core ] 0 of the connector pin is made of a softer material, for example a non-ferrous alloy, and the optical fibre 2 can, after insertion into the optimum posi~ion, be fastened in a known way by stamping. The optical axis 12 of the optical fibre runs parallel to the middle axis of the connector pin 3. An annular indentation 8 is provided on the face 5 which, however, does not include the outer ferrule 9. The indentation can be previously cast into the core 10 or can be subsequently produced through turning. A section 16 remains around the fibre end surface 4 so that, even with the maximum permitted eccentricity of the optical fibre, the fibre end surface 4 is always surrounded by the material 10 of the core part. The diameter of the connector pin 3 lies within the range between 2 mm to 4mm. -A surrounding chamfer 11 facilitates the connection procedure.
The inclination of the fibre end surface 4 and the section 16 ensues in this version with a grinding disk 14, which is rotated about the grinding disk axis 19 in the direction of the arrow x. The cy]indrical grinding disk possesses a radius r, so that the inclination runs cylindrically with an inward curvature. The angle between the grinding disk axis l 9 and the optical axis 12 can be ascertained through calculation, so that the desired return loss can be achieved with consideration of a~l possible parameters. The inclination on the fibre end surface 4 causes a deflection of the light beam in the deflection axis 18, relative to the optical axis 12 of the optical fibre.
The hard outer ferrule 9 is completely untouched by the inclined grinding. The cylindrical curvature of the inclination can be ignored withoùt further consequence, since the diameter of the optical i~ibre is extremely small~
-.:. .
,. : : ; ' S ~ 3 ~ ~ 3 In figure 4, an alternative version is depicted in which the connector pin is, however, similarly constructed to the version according to figures 1 to 3. The optical axis 12 of the optical fibre is, however, arranged to be inclined to the middle axis 13 of the connector pin. As opposed to the previously described version, the inclination does not, however, run with a curvature, but is flat. The flat inclination can be achieved through the use of a cup-wheel ] 5 which is rotated in the direction of the arrow y around the grinding disk axis 20. The grinding surface 17 on the cup-wheel thus produces the inclination.
Here also, an edge area 7 remains around the inclination which extends through 360 degrees. Whatever relative position the optical axis 12 exhibits depends considerably on the purpose for which the connector will be used.
The inclination of the fibre end surface 4 can be selected in such a way that the light beam exits parallel to the connector axis.
With this arrangement of the optical fibre, the exiting light can be im mediately fed into a lens system .
With the version according to figure 5, the optical axis 12 of the fibres 2 and the connector axis 13 are once again parallel. The inclination 6 is, however, formed ball-shaped and is produced by a ball-shaped grinding head 21 that is r~ated around the axis 20 in the direction of the arrow z. The axis 20 is arranged to be offset in relation to the axes 12/13. The concave curvature on the fibre end surface can in practice also be ignored. Finally, not depicted here but likewise conceivab]e would be the application of an inclination by means of a grinding disk whose rotational axis runs at rightangles to the connector axis 13, but is, however, offset in relation to it. The result would likewise be a cylindrical inclination, but with a displaced centre.
::
Claims (7)
1. Connector (1) for an optical fibre (2) which is fastened in a connector pin (3), whereby the fibre end surface (4) on the face (5) of the connector pin is inclined in relation to the optical axis (12) of the optical fibre and in relation to the middle axis (13) of the connector pin in order to achieve a high return loss, characterized in that the inclination (6) only includes the fibre end surface (4) and the section (16) of the face (5) immediately surrounding it, and that the inclination is completely surrounded by an edge area (7) of the face which lies in a plane arranged at rightangles to the middle axis (13) of the connector pin, whereby the inclination is separated from the edge area (7) by an annular shaped indentation (8).
2. Connector according to claim 1, characterized in that the connector pin comprises an outer ferrule (9) of a relatively hard material and a core (10) of a softer material, and that the edge area (7) is formed from the face of the outer ferrule (9).
3. Connector according to one of the claims 1 or 2, characterized in that the inclination runs flat.
4. Connector according to one of the claims 1 or 2, characterized in that the inclination runs cylindrically with an inward curvature.
5. Connector according to one of the claims l or 2, characterized in that the inclination runs ball-shaped with an inward curvature.
6. Connector according to one of the claims 1 to 5, characterized in that the connector pin is at least partly made from a metallic sintered material.
7. Connector according to one of the claims 1 to 5, characterized in that the connector pin is at least partly made from a ceramic material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3575/89A CH678980A5 (en) | 1989-10-02 | 1989-10-02 | |
| CH3575/89 | 1989-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2025589A1 true CA2025589A1 (en) | 1991-04-03 |
Family
ID=4258942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002025589A Abandoned CA2025589A1 (en) | 1989-10-02 | 1990-09-18 | Connector for an optical fibre |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5062682A (en) |
| EP (1) | EP0421926A1 (en) |
| JP (1) | JPH03126904A (en) |
| AU (1) | AU625707B2 (en) |
| CA (1) | CA2025589A1 (en) |
| CH (1) | CH678980A5 (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2245986B (en) * | 1990-05-11 | 1994-07-06 | British Telecomm | Optical fibre end face angling |
| JP2896802B2 (en) * | 1990-06-05 | 1999-05-31 | セイコーインスツルメンツ株式会社 | Manufacturing method of optical fiber connector plug |
| JP3304992B2 (en) * | 1991-07-05 | 2002-07-22 | 株式会社精工技研 | Optical coupler |
| JP3116124B2 (en) * | 1991-08-23 | 2000-12-11 | 東京特殊電線株式会社 | Optical fiber connector |
| US5193133A (en) * | 1992-01-21 | 1993-03-09 | Methode Electronics, Inc. | Method of terminating optical fiber utilizing a plastic alignment ferrule with polishing pedestal |
| JPH05224158A (en) * | 1992-02-14 | 1993-09-03 | Matsushita Electric Ind Co Ltd | Optical filter and light amplifier using the same |
| JPH0647912U (en) * | 1992-11-30 | 1994-06-28 | 古河電気工業株式会社 | Multi-fiber optical connector |
| GB9227040D0 (en) * | 1992-12-29 | 1993-02-24 | Bt & D Technologies Ltd | Fibre termination |
| US5395025A (en) * | 1993-03-29 | 1995-03-07 | Minnesota Mining And Manufacturing Company | Method and apparatus for angle cleaving ribbon fiber |
| GB9310231D0 (en) * | 1993-05-18 | 1993-06-30 | Amp Holland | Improved fibre optic ferrule |
| US5351327A (en) * | 1993-06-25 | 1994-09-27 | Minnesota Mining And Manufacturing Company | Polished fiber optic ferrules |
| EP0652451B1 (en) * | 1993-11-08 | 2001-08-08 | Corning Incorporated | Planar optical waveguides with low back reflection pigtailing |
| JPH07159651A (en) * | 1993-12-10 | 1995-06-23 | Totoku Electric Co Ltd | Ferrule having polished end face and its production |
| US5412747A (en) * | 1994-03-07 | 1995-05-02 | Emit Seiko Co., Ltd. | Apparatus for and method of polishing optical connectors |
| US5432880A (en) * | 1994-03-17 | 1995-07-11 | At&T Corp. | Angled optical connector ferrule |
| US5590229A (en) * | 1994-04-22 | 1996-12-31 | Litton Systems, Inc. | Multichannel fiber optic connector |
| US5500911A (en) * | 1994-08-05 | 1996-03-19 | The Whitaker Corporation | Lensed optical fiber assembly and process for alignment with an active device |
| US5557696A (en) * | 1995-04-24 | 1996-09-17 | Stein; Harold M. | Adaptors for a device for cleaning and polishing an optical fiber |
| US5724466A (en) * | 1995-11-16 | 1998-03-03 | Raytheon E-Systems | Ruggedized blind mating connector for optical fibers |
| US5633963A (en) * | 1995-12-12 | 1997-05-27 | Raytheon Company | Optical rotary joint for single and multimode fibers |
| US5796894A (en) * | 1996-11-21 | 1998-08-18 | Lucent Technologies, Inc. | Fiber optic connector with improved return loss performance |
| US5924234A (en) * | 1997-11-20 | 1999-07-20 | Trijicon, Inc. | Optical sighting device |
| US6546182B2 (en) * | 2001-05-15 | 2003-04-08 | Siwave, Inc. | Angled fiber termination and methods of making the same |
| ATE518158T1 (en) * | 2001-09-07 | 2011-08-15 | Nhk Sales Company Ltd | ENDSURFACE TREATMENT METHOD FOR AN OPTICAL PLASTIC FIBER |
| US7813634B2 (en) | 2005-02-28 | 2010-10-12 | Tessera MEMS Technologies, Inc. | Autofocus camera |
| US6807742B2 (en) * | 2002-09-06 | 2004-10-26 | Trijicon, Inc. | Reflex sight with multiple power sources for reticle |
| US6827597B1 (en) | 2003-11-20 | 2004-12-07 | Pgs Americas, Inc. | Combined electrical and optical cable connector particularly suited for marine seismic sensor streamers |
| JP5356944B2 (en) * | 2009-07-30 | 2013-12-04 | 日立電線株式会社 | Optical fiber connecting component and optical module using the same |
| EP2354824A1 (en) * | 2010-01-29 | 2011-08-10 | CCS Technology Inc. | Hybrid connector |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58152212A (en) * | 1982-03-05 | 1983-09-09 | Nec Corp | Optical connector |
| US4687292A (en) * | 1984-04-18 | 1987-08-18 | Siemens Aktiengesellschaft | Light waveguide plug connector |
| US4813760A (en) * | 1985-02-26 | 1989-03-21 | E. I. Du Pont De Nemours And Company | Optical connector and plugs therefor |
| DE3683424D1 (en) * | 1985-06-20 | 1992-02-27 | Diamond Sa | METHOD AND DEVICE FOR CENTERING THE CORE OF A LIGHT GUIDE IN A LIGHT GUIDE. |
| EP0207373A1 (en) * | 1985-06-21 | 1987-01-07 | Siemens Aktiengesellschaft | Ferrule for an optical wave guide |
| EP0262770A1 (en) * | 1986-08-11 | 1988-04-06 | Amphenol Corporation | Method for terminating a fiber optic cable with a fiber optic connector, tool for terminating and a kit therefor |
| CH674281A5 (en) * | 1987-08-24 | 1990-05-15 | Feller Ag | |
| US4978193A (en) * | 1989-08-24 | 1990-12-18 | Raychem Corporation | Optical fiber connector which provides a high signal return loss |
-
1989
- 1989-10-02 CH CH3575/89A patent/CH678980A5/de not_active IP Right Cessation
-
1990
- 1990-09-18 CA CA002025589A patent/CA2025589A1/en not_active Abandoned
- 1990-09-20 EP EP90810721A patent/EP0421926A1/en not_active Withdrawn
- 1990-09-20 US US07/585,188 patent/US5062682A/en not_active Expired - Fee Related
- 1990-09-28 AU AU63280/90A patent/AU625707B2/en not_active Ceased
- 1990-10-02 JP JP2264915A patent/JPH03126904A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| AU6328090A (en) | 1991-04-11 |
| AU625707B2 (en) | 1992-07-16 |
| EP0421926A1 (en) | 1991-04-10 |
| US5062682A (en) | 1991-11-05 |
| CH678980A5 (en) | 1991-11-29 |
| JPH03126904A (en) | 1991-05-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19970918 |