CN100550280C - Optical devices - Google Patents
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- CN100550280C CN100550280C CNB2004100351697A CN200410035169A CN100550280C CN 100550280 C CN100550280 C CN 100550280C CN B2004100351697 A CNB2004100351697 A CN B2004100351697A CN 200410035169 A CN200410035169 A CN 200410035169A CN 100550280 C CN100550280 C CN 100550280C
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- side sealing
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Abstract
The objective of the invention is to: provide a kind of and can make the Optical devices miniaturization that constitutes by concave mirror and discharge lamp, and can prevent to produce the structure in the crack on the cathode side sealing.These Optical devices, by ultra-high pressure discharge lamp, and the concave mirror that surrounds this discharge lamp constitute, it is characterized in that: discharge lamp is to have connected a pair of sealing at the two ends of the illuminating part that is made of quartz glass and enclosed in this illuminating part to be not less than 0.15mg/mm
3Mercury and the distance of pair of electrodes (3,4) is configured to be not more than 2.0mm.And, ultra-high pressure discharge lamp, the length of its anode-side sealing is not more than 20mm, and insert at this anode-side sealing under the state at top of concave mirror, by contain sodium composition and/or lithium composition inorganic be that bonding agent is touched and keeps, and this is inorganic to be the anode electric insulation of bonding agent and discharge lamp.
Description
Technical field
Mercury vapor when the present invention relates to bright lamp is pressed to reach and is not less than 150 atmospheric ultra-high pressure discharge lamps, be particularly related to as using liquid crystal pictorial display device or DMD (Digital MicromirrorDevice, that is the ultra-high pressure discharge lamp that the projection of the projection arrangements (proector) such as (digital light beam processors) of DLP digital microlens device) is used with light source.
Background technology
The porjection type projection arrangement is required the rectangle screen is come illumination image equably and with sufficient color rendition.Therefore, light source uses the metal halid lamp that charges into mercury or metal halide.And, advanced further miniaturization, point-source of lightization, and the minimum light source of distance is practical also between the electrode.
Under such background, there is motion to propose to press with high mercury vapor, for example, the lamp that is not less than 200 handkerchiefs (about 197 atmospheric pressure) comes the substituted metal Halogen lamp LED.This lamp is pressed by improving mercury vapor, suppresses the diffusion of electric arc, and has realized further raising light output, for example, opens flat 2-148561 number (United States Patent (USP) the 5109181st), spy as the spy and opens in flat 6-52830 number (United States Patent (USP) the 5497049th) disclosed.
On the other hand, projection arrangement adopts DLP (the digital light beam processor) mode of using DMD (digital microlens device), needn't use liquid crystal panel, and further miniaturization is attracted attention thus.That is, the discharge lamp by the projection of projection arrangement constitutes with light source is being required high light output and illumination sustainment rate on the other hand, and along with the miniaturization of projection arrangement, speculum and discharge lamp also are required miniaturization.
Fig. 6 is the Optical devices that are assembled in the projection arrangement, the state that its expression is made of concave mirror and discharge lamp.(a) the common Optical devices of expression, (b) expression has realized the Optical devices of further miniaturization according to the requirement of miniaturization.
In (a), in the discharge lamp 1, illuminating part 10 is connected with sealing 11a, 11b on its two ends.Front end at anode-side sealing 11a has been installed lamp holder 12, and this lamp holder 12 is installed on the support component 14 by bonding agent 13.Support component 14 is connected with concave mirror 2 by link 15.This link 15 constitutes the structure of the energy coolant seal 11a of portion for example for having the metallic plate of ventilation hole.
In (b), shortened the length of sealing 11a, and lamp holder 12 is installed on the support component 14 by bonding agent 13, this support component 14 directly is installed on the concave mirror 2 by bonding agent (omitting diagram) etc.Therefore, compare with the structure of (a), difference is: shortened sealing 11a, and, do not use link 15.In addition, explanation is that performance, specification with discharge lamps such as rated power is all prerequisite mutually and carries out.
At this moment, discharge lamp and concave mirror be by hi-Fix, and must be firmly fixed, to prevent because of small vibration failure position relation.This be because the electric arc origination point of discharge lamp if not on the focus of concave mirror, then the delivery efficiency of light can significantly reduce.Therefore, (a),
(b) among two figure, bonding agent plays an important role on the meaning of fixing both position relations.
According to such background, at present, many Optical devices of selling on the market are only considered from the viewpoint that discharge lamp and concave mirror are firmly fixed.Thereby, between the gap of discharge lamp and concave mirror or support component formation, injected a large amount of bonding agents.
So, for the Optical devices miniaturization, must get down to the miniaturization of the mounting structure (concrete is the structure of anode-side sealing 11a, lamp holder 12, bonding agent 13, support component 14 etc.) that is formed on the concave mirror top outer.This is that the inside of concave mirror has been limited size and shape to a certain degree because from obtaining the viewpoint of light.
That is, the miniaturization requirement according to projection arrangement requires the Optical devices miniaturization, as the structure that satisfies this requirement, and the progressively miniaturization of the structure of concave mirror top outer.
But, in above-mentioned Optical devices, produced on discharge lamp cathode side sealing 11b and to have produced that metal forming is floated or crack and damage the problem of discharge lamp.Particularly, after the Optical devices with Fig. 6 (a) and (b) compare, recognize that the Optical devices of figure (b) structure produce damage more.
Summary of the invention
The problem to be solved in the present invention is: a kind of structure of the Optical devices that are made of concave mirror and discharge lamp is provided, and its miniaturization also can prevent to produce the crack at the cathode side sealing.
In order to address the above problem, the Optical devices of first invention of the present invention, it is made of ultra-high pressure discharge lamp and the concave mirror that surrounds this discharge lamp, and discharge lamp connects a pair of sealing at the illuminating part two ends that are made of quartz glass, charges into to be no less than 0.15mg/mm in this illuminating part
3Mercury, and with pair of electrodes to be not more than the distance configuration of 2.0mm.And, ultra-high pressure discharge lamp is characterised in that, the length of its anode-side sealing is not more than 0.115 times (mm) of specified bright lamp power (W), this anode-side sealing is under the state that inserts the concave mirror top, by comprising the inorganic of sodium composition and/or lithium composition is that bonding agent is touched maintenance, and this is inorganic to be the anode electric insulation of bonding agent and discharge lamp.
In addition, the Optical devices of second invention, its by above-mentioned ultra-high pressure discharge lamp, and the concave mirror that surrounds this discharge lamp constitute, it is characterized in that: the anode-side sealing of this ultra-high pressure discharge lamp is under the state that inserts the concave mirror top, by comprising the inorganic of sodium composition and/or lithium composition is that bonding agent is touched maintenance, and inorganic at this is on the bonding agent, temperature is not higher than 450 ℃ position when the bright lamp of lamp, the electroconductive component that contact is electrically connected with anode.
In addition, the Optical devices of the 3rd invention, its by above-mentioned ultra-high pressure discharge lamp, and the concave mirror that surrounds this discharge lamp constitute, it is characterized in that: the anode-side sealing of this ultra-high pressure discharge lamp is under the state that inserts described concave mirror top, by comprising the inorganic of sodium composition and/or lithium composition is that bonding agent is touched maintenance, and, inorganic at this is on the bonding agent, the electroconductive component that is electrically connected with anode, to this anode-side sealing, leave 1/20 (mm) that is not less than specified bright lamp power (W) from the boundary position of illuminating part and anode-side sealing.
Description of drawings
Fig. 1 is the overall diagram of Optical devices of the present invention.
Fig. 2 is the partial enlarged drawing of Optical devices of the present invention.
Fig. 3 is the overall diagram of Optical devices of the present invention.
Fig. 4 is the partial enlarged drawing of Optical devices of the present invention.
Fig. 5 illustrates employed discharge lamp in the Optical devices of the present invention.
Fig. 6 illustrates employed discharge lamp in the past the Optical devices.
Embodiment
Fig. 1 is the schematic configuration diagram that is used to illustrate first Optical devices of inventing.
Optical devices by short electric arc type ultra-high pressure discharge lamp 1 (below, be called discharge lamp simply) and the concave mirror 2 that surrounds this discharge lamp 1 constitute, the electric arc direction basically identical of the optical axis L of concave mirror 2 and electric light 1, and the electric arc bright spot of discharge lamp 1 is configured to consistent with first focus of concave mirror 2.
The discharge vessel of discharge lamp 1 by roughly spherical illuminating part 10, constitute with continuous elongated rod shape sealing 11a, the 11b in the two ends of this illuminating part 10, is provided with anode 3 and negative electrode 4 opposite to each other in illuminating part 10.The anode-side sealing 11a of discharge lamp 1 is inserted into the opening at the top 21 of concave mirror 2, and anode-side sealing 11a is installed on the support component 14 by bonding agent 13.Protruded current supply line 16 from the front end of sealing 11a, and by supply lines etc. with omitted illustrated electric supply installation and be electrically connected.Support component 14 is made of ceramic material etc., but also can be the tube portion shape of stretching out integratedly from the top of concave mirror for example.
The integral body of speculum 2 is the elliptical condenser mirrors that roughly are bowl-shape, is made of top 21 and front openings portion 22.Front openings portion 22 is essential when radiating light, is provided with opening for discharge lamp is installed on top 21.On the inner face of speculum 2, for example, form titanium oxide (TiO
2) and silicon dioxide (SiO
2) the dielectric multilayer film, and have the function of the required wavelength of reflection, and the focal position of speculum 2 is positioned on the electric arc bright spot of discharge lamp 1.The material of speculum, for example, it adopts Pyrex, but also can constitute speculum with the metal parts of aluminium etc. or pottery etc.In the front openings portion 22 of speculum 2, for example, the light transmission front glass 23 that is made of pyrex etc. has been installed.By being set, front glass 23 inside of speculum 2 can be formed airtight construction.Therefore, just in case, in discharge lamp 1 breakage the time, can prevent separation of fragments.In addition, front glass 23 is not indispensable parts, can adopt the structure that front glass is not set under the high occasion of the necessity of cooling discharge lamp.And, also can adopt front glass 23 is set, but the structure of also incomplete sealed inside only is provided with the structure of cooling with opening in a part.
Be positioned at the anode-side sealing 11a of the open top side of concave mirror 2, shorten for the miniaturization of corresponding Optical devices.Specifically be 0.115 times (mm) that is not more than the bright lamp power (W) of lamp, during rated power 200W when being not more than 23mm, rated power 180W for being not more than 20.7mm.The length of sealing depends on temperature in theory, and temperature then depends on the specified bright lamp power of lamp.
Bonding agent is an inorganic system of containing sodium composition or lithium composition at least, for example, can adopt decimillimeter Race to draw Mu's (ス ミ セ ラ system, trade name), Si Laoji three (trade name).About composition, drawing Mu with decimillimeter Race is that example is described below, and it is with silicon dioxide (SiO
2), aluminium oxide (Al
2O
3), water (H
2O) be main component, and contain the sodium oxide molybdena (Na of trace
2O
3) or lithia (Li
2O).
The Optical devices of first invention, it is characterized in that: inorganic is the anode electric insulation of bonding agent and discharge lamp, both not conductings.Specifically, contact and to have filled inorganic be bonding agent 13 on the outer peripheral face of anode-side sealing 11a, but bonding agent 13 directly do not contact with externally fed lead 16, and, do not contact with externally fed lead 16 by electroconductive component yet.
Fig. 2 is the explanation enlarged drawing relevant with bonding agent with the anode-side sealing of discharge lamp.
The axial region 31 of anode 3 engages with metal forming 32, engages externally fed lead 16 on the other end of this metal forming 32.Metal forming 32 is embedded among the anode-side sealing 11a fully, constructs the discharge space of salable illuminating part 10 according to this, and at the electric power supply structure of the inside and outside formation of illuminating part 10.Metal forming 32 Cai Molybdenum.
Contact and have a bonding agent 13 on the outer surface of sealing 11a.In addition, in the drawings,, only show bonding agent, but as shown in Figure 1, it is present on the whole outer peripheral face of sealing 11a on the top of sealing for ease of explanation.
At this, present inventors are floated or reasons of cracks the paillon foil that the cathode side sealing at the Optical devices shown in above-mentioned Fig. 6 produces, and have carried out conscientiously research, and the result has found out following content.
That is, be contained in sodium composition or lithium composition in the bonding agent 13, drawn, and move to the direction of diagram a by the negative electrode of illuminating part 10.In a word, because sodium composition or lithium composition have positive charge, be subjected to the attraction of the negative electrical charge of negative electrode.
Moving of this sodium composition or lithium composition, be considered to not only by emitting space under the situation that negative electrode moves, also take place under the situation that the cathode side sealing moves in the inside of the quartz glass by constituting illuminating part.
And the part in these sodium compositions or the lithium composition on the metal forming that is delivered to the cathode side sealing, is destroyed both joints.Can infer,, weaken the airtight of metal forming and quartz glass, just produce so-called paillon foil and floated phenomenon, and cause crack or lamp to destroy because of the generation paillon foil floats as its result.
This phenomenon, and length anode-side sealing very little at emitting space when interelectrode distance is not more than 2.0mm is to be not more than in the very short discharge lamp of 20mm (during the lighting power 180W left and right sides), when using bonding agent, can be described as the technical problem of initial generation for the anode-side sealing with this discharge lamp is assembled in speculum.
That is, produce the phenomenon that sodium composition or lithium composition are attracted by negative electrode because of interelectrode distance is short, and its reason is also to be coated with a large amount of bonding agents owing to the anode-side sealing is short, bonding agent all is present near illuminating part.
At this moment, so-called anode-side sealing length shown in the A among the figure, is the distance from the boundary 1 of illuminating part 10 and sealing 11 to the sealing outer end.
If the result that present inventors further scrutinize finds bonding agent by electric insulation, and then the mobile of this sodium composition or lithium composition can stop by nature.
Promptly, be contained in the sodium composition or the lithium composition of bonding agent, even attracted by negative electrode and move to the cathode side sealing, the bonding agent that is lost this sodium composition or lithium composition is negative electrical charge because of the minimizing of positive charge becomes from neutral state, its result has lost the locomotivity to negative electrode.
Therefore, if will be coated on the bonding agent electric insulation of sealing, even then produce moving of a small amount of sodium composition or lithium composition at the bright lamp initial stage, thereafter, this moves and can stop by nature, found that produce not that paillon foil floats or the so-called practicality in crack on problem.
In addition, in structure, as shown in Figure 2, except the location of considering bonding agent and make it does not contact, for example, the insulating properties lamp holder of pottery etc. can be set in the sealing outer end with bonding agent and anode electric insulation.And, be not limited to lamp holder, also can adopt insulating element is made dividing plate.
Below, second Optical devices of inventing are described.
Fig. 3 illustrates the Optical devices that are made of discharge lamp and concave mirror, and Fig. 4 is the structural map that has amplified anode-side sealing and bonding agent.With Fig. 1, structure difference shown in Figure 2 be the outboard end that metallic lamp holder 12 (conductive component) is installed on sealing, bonding agent 13 contacts with the outer peripheral face of this lamp holder 12.That is, bonding agent 13 is electrically connected with anode 3 by metallic lamp holder 12.
Present inventors find, as mentioned above, even in bonding agent and structure that anode is electrically connected, if be not higher than 450 ℃ when the bright lamp of lamp, can prevent then that paillon foil from floating, the crack with the contact position temperature of this bonding agent well.Specifically be that when the metallic lamp holder was installed on the sealing outer end, the contact position temperature of this lamp holder and bonding agent only otherwise being higher than 450 ℃ gets final product.
Its reason is, is contained in the sodium composition or the lithium composition of bonding agent 13, the same ground of its structure with Fig. 2, and diffusion (intrusion) is in the quartz glass as the anode-side sealing.But constructing different with Fig. 2 is that because bonding agent has been replenished positive charge, itself does not become negative electrical charge from neutral state bonding agent.Therefore, sodium composition or lithium composition do not continue to spread in discharge lamp.
Second invention has solved such problem, and finds that sodium composition or lithium composition spread to quartz glass, not only is subjected to based on electropolar attraction, also is subjected to both contact position Temperature Influence.That is, sodium composition or lithium composition, it be not higher than 450 ℃, preferably is not higher than 300 ℃, is more preferably under the condition that is not higher than 200 ℃, is difficult for spreading to quartz glass.
Certainly,, also can not stop diffusion fully, have minor constituent and be diffused in the quartz glass, and other extraneous factors such as existence because of humidity or static, dust also there is the possibility that causes to the quartz glass diffusion even be not higher than under 450 ℃ the condition.But, to test indicatedly as described later, other ectocine can not cause paillon foil to float or the generation in crack.
Specifically be, position 12a shown in Figure 4, temperature is the highest in the contact position of lamp holder 12 and bonding agent 13, and the temperature of bonding agent has just become problem on the 12a of this position.Generally, high more near the discharge space temperature more.But, for example,, when perhaps being subjected to partly influencing etc., also may not become problem on every side near the position of discharge space in local warming or when cooling.Therefore, in whole positions that lamp holder 12 contacts with bonding agent 13, preferably be not higher than 450 ℃.
In addition, as shown in Figure 4, to discharge space side adhesive-applying, do not have problems from position 12a.Because in this part,, also continue to carry out even generation sodium composition or lithium composition spread to quartz glass.
In addition, as shown in Figure 2, in the structure that electroconductive component is not set,, be controlled at by temperature and be not higher than 450 ℃, can prevent that sodium composition or lithium composition from spreading to quartz glass bonding agent even directly contact at bonding agent under the situation of outer lead.At this moment, outer lead is equivalent to the electroconductive component that is electrically connected with anode.
Below, the 3rd Optical devices of inventing are described.
With reference to Fig. 3, structure shown in Figure 4 this invention can be described.
Be characterised in that at Fig. 3, structure shown in Figure 4, the metallic lamp holder 12 of electroconductive component, the position in 1/20 times of distance (mm) of leaving the bright lamp power of lamp (W) from the boundary position of illuminating part and sealing contacts with bonding agent.That is, present inventors find, if adopt this structure, even then in second invention, utilize temperature regulation contact position, can solve also that paillon foil floats, problem of cracks.With respect to the temperature regulation contact position that utilizes bonding agent in second invention, concrete distance has been stipulated in the 3rd invention.
Its reason is, because the temperature of bonding agent is subjected to the mastery influence because of the heating of discharge lamp, so can determine approximate location with distance according to the specified bright lamp power of this discharge lamp.Specifically be to leave to the sealing outer end from the position of 1/20 times of (mm) distance of rated power.Present inventors confirm, are not more than 0.15mg/mm in amount of mercury
3Distance is not more than 2.0mm between the electrode, the anode-side sealing is not more than 20mm (when bright lamp power is the 180W left and right sides), and use contain sodium composition or lithium composition inorganic be bonding agent and discharge lamp is installed and the structure of concave mirror in, if distance was about 5 (mm) when rated power was 100 (W), distance was about 7.5 (mm) when rated power was 150 (W), distance was about 9 (mm) when rated power was 180 (W), distance was about 10 (mm) when rated power was 200 (W), distance was about 12.5 (mm) when rated power was 250 (W), distance was about 15 (mm) when rated power was 300 (W), then can solve paillon foil and float, problem of cracks.This distance, mean illuminating part and sealing boundary position, apart from electroconductive component 12 contact with bonding agent 13 near the interval of the position of illuminating part.
Promptly, if will be to come the position of regulation bonding agent as benchmark with the distance of the relation decision of the specified bright lamp power of discharge lamp, then the temperature of bonding agent in fact is not higher than 450 ℃ yet, and is same with the content of explanation in second invention, can reduce the diffusivity of sodium composition or lithium composition.
Above-mentioned distance forces the situation of cooling body also to be stipulated to not being provided with, and when being provided with the pressure cooling body, the contact position of bonding agent and electroconductive component can be set to the value littler than above-mentioned distance.
Below introduction is common to first invention, second invention, the 3rd is invented, the numerical example on the installation constitution of concave mirror and discharge lamp.
The length of anode-side sealing 11a as mentioned above, must be not more than 0.115 times (mm) of specified bright lamp power (W), specifically, when rated power is 150 (W), need be not more than 17.25 (mm); When rated power is 180 (W), be not more than 20.7 (mm); When rated power is 200 (W), need be not more than 34.5 (mm).When only considering the miniaturization of Optical devices, preferably unrestrictedly dwindle, but owing to when adding the bright lamp intensity of headlight, be subjected to Temperature Influence, so can not shorten simply sometimes.Concrete is that when rated power was 200 (W), for example scope was 10mm～20mm, then can adopt for example 15mm, 18mm, 20mm.
The external diameter of sealing can be selected from the scope of φ 5mm～8mm, for example φ 5.8mm.When only considering the miniaturization of Optical devices, preferably unrestrictedly dwindle length, the external diameter of sealing, but since be subjected to the support of electrode or illuminating part sealing, and other manufacturing operations on restriction need to a certain degree size, and set lower limit as described above.
The opening diameter at the top 21 of concave mirror 20 can be selected from the scope of φ 30mm～100mm, for example φ 50mm.
The internal diameter of support component 14 can be selected from the scope of φ 8mm～18mm, for example φ 12mm.
In addition, as common content in the 1st～3 invention, as shown in Figure 1 and Figure 2, on discharge lamp, disposed triggering lead 30.An end that triggers lead 30 is connected with the cathode side outer lead, and the other end is wound on the boundary position of illuminating part 10 and the 11a of anode seal portion.This triggers lead 30, and when the bright lamp of discharge lamp started, the antianode root applied negative electrical charge, therefore, when discharge lamp starts, triggers generation inductor shielding discharge between lead and the anode at this, has thus to make bright lamp start the action effect of facilitation.
The Optical devices of the 1st～3 invention, be provided with that an end is connected with the cathode side outer lead, during triggering lead on the boundary position that the other end is wound on illuminating part 10 and the 11a of anode seal portion, effective especially.This is because apply the structure of negative electrical charge at the anode root, has encouraged the sodium composition that is contained in the bonding agent or the electric attraction of lithium composition.
So far, Optical devices of the present invention are summarized as follows.
The Optical devices of first invention, its content is: with contain sodium composition and/or lithium composition inorganic is that bonding agent is installed the anode-side sealing of discharge lamp and the structure of concave mirror, and with inorganic be the anode electric insulation of bonding agent and discharge lamp.At this moment, though the inorganic quartz glass diffusion that is the sodium composition of bonding agent and/or lithium composition to discharge lamp since should be inorganic be that bonding agent becomes negative charge state from neutral state, so this diffusion to quartz glass stops naturally.
The Optical devices of second invention, its content is: similarly, with containing the inorganic of sodium composition and/or lithium composition is that bonding agent is installed the anode-side sealing of discharge lamp and the structure of concave mirror, this is inorganic to be that bonding agent is electrically connected with the anode of discharge lamp, and the temperature that makes the contact position on the bonding agent is 450
℃Below.At this moment, because this temperature is not the activated temperature of bonding agent, thus if continue the supply of positive charge, can prevent that also sodium composition and/or lithium composition from spreading to quartz glass, and reach the level that does not in fact have influence.
The Optical devices of the 3rd invention, its content is: structure is with above-mentioned the same, and this is inorganic to be that bonding agent is electrically connected with the anode of discharge lamp, and makes contact position on the bonding agent leave 1/20 times distance of discharge lamp rated power from illuminating part.At this moment, the same with second invention, owing to do not reach the activated temperature of bonding agent, thus if continue the supply of positive charge, can prevent that also sodium composition and/or lithium composition from spreading to quartz glass, and reach the level that does not in fact have influence.
Fig. 5 is the signal overall diagram that is used for an example of the discharge lamp on the Optical devices of the present invention.
In addition, anode 3, negative electrode 4 comprise the stem portion that combines with metal forming sometimes and show as electrode, but in the present invention, short of special reason then is called the stem portion 31 of anode, the stem portion 41 of negative electrode.
In illuminating part 10, mercury, rare gas, halogen gas have been enclosed.
Mercury is to be used to obtain necessary visible wavelengths, and for example, wavelength is the radiating light of 360～780nm, and it is not less than 0.15mg/mm by inclosure
3This enclosed volume is different because of temperature conditions, but it is not less than 150 atmospheric high steam pressures when reaching bright lamp.In addition, by enclosing more mercurys, the mercury vapour when making bright lamp is pressed to being not less than 200 atmospheric pressure, being not less than the high mercury vapour pressure discharge lamp of 300 atmospheric what is called, the high more light source that can realize being applicable to projection arrangement more of mercury vapour pressure.
Rare gas improves bright lamp startability, for example, encloses about 13kPa argon gas.
Halogen gas iodine, bromine, chlorine etc. are enclosed with the form of mercury and other metallic compounds.The enclosed volume of halogen gas, for example, can be from 10
-6～10
-2μ mol/mm
3Scope select, its function is to utilize the long lifetime of halogen cycle, but shown in discharge lamp of the present invention, minimal type and have the device of pressing in high is enclosed the effect that is considered to prevent discharge vessel breakage, devitrification with halogen so.
If enumerate the Numerical examples of such discharge lamp, for example, the external diameter of illuminating part can be selected from the scope of Φ 6.0mm～15.0mm, for example Φ 9.5mm; Interelectrode distance can be selected from the scope of 0.5～2.0mm, for example 1.5mm; The luminous tube internal volume can be from 40～300mm
3Scope in select 75mm for example
3Bright lamp condition for example, is that the tube wall load is 1.5W/mm
2, rated voltage is that 80V, rated power are 150W.
In addition, this discharge lamp is the lamp that is built in the small-sized Huade projection arrangement etc., and its unitary construction is by extremely miniaturization, and is required to have high light quantity.So the heat condition in the illuminating part is also extremely strict, its tube wall load value is 0.8～2.0W/mm
2, concrete be 1.5W/mm
2
In addition, it can be loaded into above-mentioned projection arrangement or as the projection of overhead projector with on the machine, provide color reductibility good radiating light.
The structure of electrode axis part, as shown in Figure 5, when its diameter of illuminating part is big preferably with the bound fraction miniaturization of metal forming.This is because it also becomes greatly with the bonded area of metal forming when electrode diameter is big, might because of both the combination undesirable space of generation and encouraged entering of sodium composition, lithium composition.
The external diameter of the anode shaft 31 shown in the figure is littler than anode 3, and the external diameter of anode shaft 31 also divides 2 steps to diminish.The external diameter that forms anode 3 for example is 1.8mm, and the external diameter of anode shaft 31 for example constitutes 1.4mm and 0.5mm.In addition, the volume that strengthens anode 3 can strengthen thermal capacity.Particularly, the discharge lamp of present embodiment reaches in the sealing 11 owing to anode 3 always, so can discharge the heating of illuminating part 10 well.
Optical devices of the present invention are in the extreme temperatures of illuminating part 10 and have on the discharge lamp of extremely hot condition, have considered directly to be coated in the device of the bonding agent influence on the sealing.
The employed discharge lamp of Optical devices of the present invention is the bright lamp type of a direct current discharge lamp, and the anode-side sealing is positioned at the open top of concave mirror.With the cathode side seal portion configurations in the open-topped structure of speculum, even bonding agent contacts with the metallic lamp holder, also apply, supply with negative electrical charge to bonding agent from this lamp holder.That is,, just be connected originally, so can not produce the phenomenon that spreads to quartz glass with cathodic electricity owing to be contained in the sodium composition or the lithium composition of bonding agent.Therefore, the cathode side sealing inserted the open top of speculum and the Optical devices of the structure installed, just do not have the technical task of the present invention originally as problem.
But, even the discharge lamp of the bright lamp of direct current, even when temporarily overturning polarity and bright lamp according to any reason, or exchange bright lamp, the bright lamp of square wave, with the discharge lamp of the bright lamp of other waveform, too, under temporary transient occasion, when this temporary transient bright lamp of interchange with the bright lamp of interchange, so long as be disposed at the electrode at concave mirror top is anode, just can be suitable for structure of optical means of the present invention.
For example, even in normal bright lamp, exchange the discharge lamp of bright lamp, also when starting, bright lamp uses the bright lamp of direct current.Particularly, enclosing 0.15mg/mm
3In the discharge lamp of mercury, after turning off the light, when bright lamp, use the bright lamp of direct current mostly immediately.Because the mercury steam pressure height in the illuminating part, and because common startup can not bright lamp, so utilize above-mentioned with the electric induction that triggers lead.
At this moment, be bright lamp when starting, the electrode that effectively will should be anode is disposed at the top of concave mirror, the electrode that should be negative electrode is disposed at the front openings side of concave mirror.
Optical devices of the present invention, to contain the inorganic of sodium composition or lithium composition be that bonding agent is precondition to use.At this moment, only do not comprise a wherein side of sodium composition or lithium composition, comprise two sides certainly yet.And not only sodium composition or lithium composition are necessary compositions as inscape, also are included in wherein as impurity sometimes certainly micro-ly.Particularly, the sodium in being contained in bonding agent or the concentration of lithium liken to impurity is included in sodium in the quartz glass that constitutes sealing or lithium when high, and the present invention is effective.This is because compared with easier the soaking into of diffusion.
In addition, it is desirable to use the material that does not contain sodium composition or lithium composition originally as bonding agent, and the structure that adopts bonding agent not contact with sealing, but, as mentioned above, owing to must position discharge lamp and concave mirror with high accuracy, and, need fixedly secure, not make position relation change, so the bonding agent known to is all undesirable now, and reality is directly to contact with bonding agent.
Below, the experiment about Optical devices of the present invention is described.
The maximum outside diameter of discharge lamp illuminating part is that 10mm, interelectrode distance are that 1.2mm, luminous tube internal volume are 66mm
3, anode seal portion length be that 20mm, mercury enclosed volume are 0.25mg/mm
3, the halogen enclosed volume is 4 * 10
-4μ mol/mm
3, tube wall load is 1.5W/mm
3, rated voltage is that 82V, rated power are 200W.
Experiment prepared 3 kinds of Optical devices (experimental provision 1., experimental provision 2., experimental provision 3.), each device has been carried out for several times experiment.2. 1. experimental provision be the Optical devices of structure shown in Fig. 3,4 with experimental provision, and 3. experimental provision is the Optical devices of structure as shown in Figure 1, 2.
Specifically be, 1. experimental provision uses the electroconductive component that is electrically connected with anode, and contacts with bonding agent in the position of distance illuminating part 4mm.2. experimental provision uses the electroconductive component that is electrically connected with anode, and contacts with bonding agent in the position of distance illuminating part 10mm.The distance of this moment is the distance apart from the boundary position of illuminating part and anode-side sealing, and bonding agent only uses " decimillimeter Race draws Mu ", and electroconductive component is the structure of coiling metallic coil.In addition, 3. experimental provision does not use electroconductive component, and bonding agent and anode are insulated.
According to experimental result for several times, 2. 1. experimental provision compared with experimental provision, then 1. experimental provision has produced as the luminous ruddiness of sodium in several minutes behind the bright lamp of lamp, compares experimental provision with it and does not 2. almost produce ruddiness.
And when continuing bright lamp, 1. experimental provision turned off the light because of producing the crack in the time of 40 minutes, compared experimental provision with it and 2. kept bright lamp.
In addition, when the scope of above-mentioned distance at 5mm～8mm suitably changed, and when carrying out same experiment, it has some differences on time or generation degree, but near experimental provision result 1., promptly produced the ruddiness that sodium causes, and the paillon foil of cathode side sealing floats, the crack.
Show that according to this experimental result on the 10mm of distance illuminating part distance, can sharply reduce with sodium is the ruddiness of cause, and can reduce significantly also that paillon foil floats or the generation in crack.
In addition, as a comparative example, when making the discharge lamp that does not have adhesive-applying similarly luminous, do not produce that ruddiness or paillon foil float, the crack.Therefore show that ruddiness is to be contained in due to the diffusion of sodium of bonding agent, and paillon foil floats or the crack also is subjected to the influence of sodium.
In addition, experimental provision 3., it has observed the ruddiness that produces because of sodium in initial several minutes, but it reduces gradually, disappears through about 20 minutes bright lamp ruddiness.And, do not produce that paillon foil floats or the crack.Promptly proved the diffusion that can stop the sodium composition with anodized insulation naturally.
As mentioned above, first Optical devices of the present invention, be with contain sodium composition and/or lithium composition inorganic be that bonding agent is installed the anode-side sealing of discharge lamp and the concave reflection structure through mirror, and with inorganic be the anode electric insulation of bonding agent and discharge lamp.According to this structure, though inorganic be the sodium composition and/or the lithium composition of bonding agent, to the diffusion of the quartz glass of discharge lamp and since this inorganic be that bonding agent becomes negative charge state from neutral state, so can stop this diffusion naturally to quartz glass.
In addition, second Optical devices of the present invention, equally, be with contain sodium composition and/or lithium composition inorganic be that bonding agent is installed the anode-side sealing of discharge lamp and the structure of concave mirror, even the anode of this bonding agent and discharge lamp is electrically connected, the temperature of the contact position on the bonding agent is not less than in 450 ℃.According to this structure, can make bonding agent be in the temperature of deactivation, even for example continue the supply of positive charge, can prevent that also sodium composition and/or lithium composition from reaching the level that does not in fact have influence to the quartz glass diffusion.
In addition, the 3rd Optical devices of the present invention, its above-mentioned second invention structure is identical, and inorganic is that the anode of bonding agent and discharge lamp is electrically connected, and the contact position on the bonding agent is left 1/20 times distance of discharge lamp rated power from illuminating part.According to this structure, the same with second invention, because bonding agent is in the temperature of deactivation, so, can prevent that also sodium composition and/or lithium composition from reaching the level that does not in fact have influence to the quartz glass diffusion even continue the supply of positive charge.
Claims (8)
1. Optical devices have: ultra-high pressure discharge lamp, connect a pair of sealing at the illuminating part two ends that constitute by quartz glass, and in this illuminating part, charge into and be not less than 0.15mg/mm
3Mercury, and with pair of electrodes to be not more than the distance configuration of 2.0mm; And the concave mirror that surrounds this ultra-high pressure discharge lamp, it is characterized in that:
The length of the anode-side sealing of described ultra-high pressure discharge lamp is not more than 0.115 times of numerical value of specified bright lamp power, and wherein, the unit of described specified bright lamp power is W, and the unit of the length of the anode-side sealing of described ultra-high pressure discharge lamp is mm,
This anode-side sealing be that bonding agent is touched maintenance by comprising the inorganic of sodium composition and/or lithium composition, and this is inorganic to be bonding agent and anode electric insulation under the state that inserts described concave mirror top.
2. Optical devices have: ultra-high pressure discharge lamp, connect a pair of sealing at the illuminating part two ends that constitute by quartz glass, and in this illuminating part, charge into and be not less than 0.15mg/mm
3Mercury, and with pair of electrodes to be not more than the distance configuration of 2.0mm; And the concave mirror that surrounds this ultra-high pressure discharge lamp, it is characterized in that:
The length of the anode-side sealing of described ultra-high pressure discharge lamp is not more than 0.115 times of numerical value of specified bright lamp power, and wherein, the unit of described specified bright lamp power is W, and the unit of the length of the anode-side sealing of described ultra-high pressure discharge lamp is mm,
And, the anode-side sealing of this ultra-high pressure discharge lamp is under the state that inserts described concave mirror top, by comprising the inorganic of sodium composition and/or lithium composition is that bonding agent is touched maintenance, and, inorganic at this is on the bonding agent, temperature is not higher than 450 ℃ position when the bright lamp of lamp, the electroconductive component that contact is electrically connected with anode.
3. Optical devices have: ultra-high pressure discharge lamp, connect a pair of sealing at the illuminating part two ends that constitute by quartz glass, and in this illuminating part, charge into and be no less than 0.15mg/mm
3Mercury, and with pair of electrodes to be not more than the distance configuration of 2.0mm; And the concave mirror that surrounds this ultra-high pressure discharge lamp, it is characterized in that:
The length of the anode-side sealing of described ultra-high pressure discharge lamp is not more than 0.115 times of specified bright lamp power, and the unit of the length of the anode-side sealing of described ultra-high pressure discharge lamp is mm,
And; The anode-side sealing of this ultra-high pressure discharge lamp is under the state that inserts described concave mirror top; Be that bonding agent is touched maintenance by comprising the inorganic of sodium composition and/or lithium composition; And; Inorganic at this is on the bonding agent; The electroconductive component that is electrically connected with anode leaves 1/20 of the numerical value that is not less than specified bright lamp power to this anode-side sealing from the boundary position of illuminating part and anode-side sealing; The unit of the distance that described electroconductive component leaves from the boundary position of illuminating part and anode-side sealing to this anode-side sealing is mm
Wherein, the unit of described specified bright lamp power is W.
4. according to claim 2 or 3 described Optical devices, it is characterized in that:
Described electroconductive component is the metallic lamp holder that covers the outboard end of described anode-side sealing.
5. according to each described Optical devices in the claim 1～3, it is characterized in that:
Described anode-side sealing by described inorganic be that bonding agent is held parts and keeps, and this holding member engages with the top of described concave mirror.
6. according to each described Optical devices in the claim 1～3, it is characterized in that:
Described ultra-high pressure discharge lamp has the triggering lead, and an end of this triggering lead is connected with the outer lead that stretches out from the cathode side sealing, and the other end is wound on the boundary position of anode-side sealing and illuminating part.
7. according to each described Optical devices in the claim 1～3, it is characterized in that:
Described ultra-high pressure discharge lamp is the bright lamp type of a direct current lamp.
8. according to each described Optical devices in the claim 1～3, it is characterized in that:
Described ultra-high pressure discharge lamp is at least at the bright lamp of bright lamp initial stage direct current, and after exchange the lamp of bright lamp.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003119612A JP4097204B2 (en) | 2003-04-24 | 2003-04-24 | Optical device |
| JP2003119612 | 2003-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1540711A CN1540711A (en) | 2004-10-27 |
| CN100550280C true CN100550280C (en) | 2009-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100351697A Expired - Fee Related CN100550280C (en) | 2003-04-24 | 2004-04-23 | Optical devices |
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|---|---|
| JP (1) | JP4097204B2 (en) |
| CN (1) | CN100550280C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4640215B2 (en) * | 2006-02-28 | 2011-03-02 | ウシオ電機株式会社 | Light source device |
| JP5477757B2 (en) * | 2007-07-17 | 2014-04-23 | ウシオ電機株式会社 | Light source device |
| JP4973439B2 (en) * | 2007-07-17 | 2012-07-11 | ウシオ電機株式会社 | Light source device |
| JP2009211867A (en) * | 2008-03-03 | 2009-09-17 | Ushio Inc | Extra-high pressure mercury lamp |
-
2003
- 2003-04-24 JP JP2003119612A patent/JP4097204B2/en not_active Expired - Fee Related
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2004
- 2004-04-23 CN CNB2004100351697A patent/CN100550280C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4097204B2 (en) | 2008-06-11 |
| CN1540711A (en) | 2004-10-27 |
| JP2004327207A (en) | 2004-11-18 |
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