CN202003132U - Optical device - Google Patents
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- CN202003132U CN202003132U CN2011200999883U CN201120099988U CN202003132U CN 202003132 U CN202003132 U CN 202003132U CN 2011200999883 U CN2011200999883 U CN 2011200999883U CN 201120099988 U CN201120099988 U CN 201120099988U CN 202003132 U CN202003132 U CN 202003132U
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- reflection mirror
- principal reflection
- short
- mercury lamp
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- Discharge Lamps And Accessories Thereof (AREA)
Abstract
The utility model relates to an optical device. Even under the condition that emitted light of a short-arc mercury lamp is efficiently utilized, the short-arc mercury lamp can be normally started. In the optical device, at least one of a main reflecting mirror (20), an auxiliary reflecting mirror (30) and a light-transmitting cover (40) has an ultraviolet light reflecting function, the main reflecting mirror (20) is formed by an elliptical surface, the auxiliary reflecting mirror (30) is formed by a spherical surface, and the main reflecting mirror (20) and the auxiliary reflecting mirror (30) are oppositely matched at the same first focus position, and are configured at the first focus point to surround the short-arc mercury lamp (10). The optical device disclosed by the utility model is characterized in that an auxiliary ultraviolet light source (70) is arranged on the non-reflecting surface in a light source device.
Description
Technical field
The utility model relates to a kind of optical devices.Relate in particular to a kind of optical devices that in projection arrangement, use.
Background technology
Generally speaking, there are the mode of using liquid crystal (LCD) panel and the mode of using DLP in the projection arrangement.
Use the mode of LCD panel that single piece type and three-chip type are arranged, but no matter which kind of mode all is that the emission light from light source is separated into 3 looks (RGB), sees through and the adjustment light corresponding with image information in the LCD panel, afterwards, syntheticly see through 3 kinds of colors of panel and project on the screen.
On the other hand, using the mode of DLP (registered trademark) is following mode: the convolutional filter that separates via the RGB zone from the emission light of light source, timesharing exposes to the spatial modulation element and (is also referred to as optical modulation device, specifically be called DMD element etc.) etc., utilize the specific light of this DMD element reflects to shine screen.The DMD element is that about about hundred ten thousand small mirror corresponding with each pixel closely arranged and formed, by control each small mirror towards the projection of controlling light.
Compare with the LCD mode, the optical system of DLP mode simply and not needs to use 3 LCD panels, therefore has the advantage of the whole small-sized simplification of device.
On the other hand, the light source of projection arrangement uses the short-arc mercury lamp with high vapor pressure.Press by improving mercury vapor, can obtain the light of the visible wavelength region of high output.
In addition, in order to make the image that projects screen bright, this short-arc mercury lamp (also abbreviating " lamp " hereinafter as) is assembled in the concave mirror (roughly being bowl-shape) of ellipse of revolution face shape.By using concave mirror, the light towards emission from all directions from lamp is converged bunchy, can shine on the limited screen of area high rate.
In recent years, the situation about using that has troubles down outside such as the projection arrangement that is used to demonstrate increases, and on the meaning of the transportation that can be easy to carry, need make equipment miniaturization, lightweight strongly.
When requiring the projection arrangement miniaturization, also require to be assembled into optical devices (discharge lamp or the concave mirror) miniaturization in the projection arrangement certainly.
Certainly, on the other hand,, can not reduce the radiative utilization ratio of short-arc mercury lamp even if be subjected to such size, the constraint of shape.
Figure 11 illustrates the schematic configuration of the optical devices that in the past proposed.This structure is open by Japanese kokai publication hei 11-64795 communique, main concave mirror 20 is provided with secondary catoptron 30 (auxiliary mirror) in addition, from the light 55 of the direct directive concave mirror of short-arc mercury lamp with pass the space between the electrode of illuminating part 11 towards the light 56 of the place ahead emission and overlap, and utilize as emergent light 57 to the light that concave mirror returns once more.
In addition, light transmission lid 40 technology that constitute of the light from the catoptron outgoing being carried out the function of light path correction by having are disclosed.
Along with the miniaturization of projector framework, the integration density in the projection arrangement improves, and cooling effectiveness worsens.Therefore, for the purpose of improving cooling effectiveness, the short-arc mercury lamp that is arranged in the projector is arranged near the framework wall of projector mostly.And, because the diffused light that spills from optical devices also is a problem, with chopping mechanism optical devices is surrounded, thereby be difficult to arrive short-arc mercury lamp 10 from the light of projection arrangement outside, the result, the startability of short-arc mercury lamp goes wrong.
As the technology of improving startability, TOHKEMY 2002-100323 communique discloses ultraviolet light and has started secondary light source.Yet in disclosed technology, owing to import ultraviolet light from end face, the light of launching from secondary light source has only seldom part arrival illuminating part, thereby can not confirm to have effect of sufficient.Particularly, not using under the situation of projection arrangement for a long time, can produce the problem that is difficult to start.In addition, be set in the time of directly to arrive on the position of illuminating part 11 by principal reflection mirror 20, secondary catoptron 30 and light transmission lid 40 spaces that surround and ultraviolet light, also have the problem that hinders by the light path of the light of principal reflection mirror 20 and 30 reflections of secondary catoptron.
Particularly, in the structure of Japanese kokai publication hei 11-64795 communique, be used as the catoptron of optics and light transmission lid institute all around and cover, therefore have the trend that significantly reduces from the light of the projection arrangement outside especially arrival of ultraviolet light.
Patent documentation 1: Japanese kokai publication hei 11-64795 number
Patent document 2: TOHKEMY 2002-100323 number
The utility model content
Problem to be solved in the utility model is, a kind of optical devices are provided, even under the radiative situation that can efficiently utilize short-arc mercury lamp, the startup of short-arc mercury lamp does not have problems yet.
In order to address the above problem, a kind of optical devices of the present utility model comprise: short-arc mercury lamp 10 is made of illuminating part with pair of electrodes and the closure that is arranged on the two ends of this illuminating part; Principal reflection mirror 20 is made of the ellipse of revolution face, and it is consistent with the electric arc direction of described short-arc mercury lamp 10 to be configured to optical axis, and the state that roughly is formed between the described electrode with first focus surrounds this short-arc mercury lamp 10; Secondary catoptron 30 is made of spherical mirror, is configured to surround the peristome of described principal reflection mirror 20, and be used to make from described short-arc mercury lamp 10 to the open side of described principal reflection mirror 20 directly the light of emission towards described principal reflection mirror 20 secondary reflection again; Peristome is set on the described secondary catoptron 30, is used to make the light from described principal reflection mirror 20 reflections to pass through; Light transmission lid 40 is set on the described peristome; And ultraviolet light reflection function, be set in described principal reflection mirror 20, described secondary catoptron 30 and the described light transmission lid 40 at least on any one, described optical devices are characterised in that, dispose ultraviolet light secondary light source 70,71 in the space that is surrounded by described principal reflection mirror 20, described secondary catoptron 30, described light transmission lid 40 and non-reflecting surface.
In addition, non-reflecting surface in the utility model not have the part contributed for the reflecting surface that connects this light supply apparatus and reflecting surface and to reflection of light, particularly, connect this pair catoptron 30 and the part of the face of a side that is provided with inteferometer coating of this light transmission lid 40, on this principal reflection mirror 20, keep this short-arc mercury lamp 10 neck shape portion, be connected this principal reflection mirror 20 and should pair catoptron 30 and the inteferometer coating part of interrupting etc.
In addition, be characterised in that described ultraviolet light secondary light source is configured in the surface of this non-reflecting surface.
In addition, the described principal reflection mirror 20 side openings footpath that is characterised in that described secondary catoptron 30 than the opening footpath of described principal reflection mirror 20 greatly or about equally, and the maximum outside diameter of described secondary catoptron 30 is less than the maximum outside diameter of described principal reflection mirror 20.
In addition, a kind of projector is characterized in that, has according to any described optical devices in the technical scheme 1 to 3.
According to the utility model, in the radiative optical devices that can utilize short-arc mercury lamp efficiently, by the ultraviolet light secondary light source is moved covering the face with ultraviolet light reflection function by principal reflection mirror, secondary catoptron, light transmission and be not formed with in the space that non-reflecting surface surrounded of reflecting surface, even thereby the optical devices miniaturization also can improve startability effectively.
In addition, by the ultraviolet light secondary light source is set, can under the situation that does not hinder light path, improve startability on the surface of non-reflecting surface.
In addition, the opening footpath by making principal reflection mirror is less than the opening footpath of secondary catoptron, the installation site that can guarantee the ultraviolet light secondary light source, and can under the situation that does not increase optical devices, improve startability.
Description of drawings
Fig. 1 is the integrally-built general profile chart that the optical devices that the utility model relates to are shown.
Fig. 2 is the explanation general profile chart that the situation of advancing of light in the optical devices that the utility model relates to is shown.
Fig. 3 is the skeleton diagram of the situation of advancing of ultraviolet light that the ultraviolet light secondary light source of the optical devices that relate to from the utility model is shown.
Fig. 4 is the skeleton diagram that the mounting structure of the optical devices medium ultraviolet light secondary light source that the utility model relates to is shown.
Fig. 5 is the general profile chart of other embodiment that the light transmission lid of the optical devices that the utility model relates to is shown.
Fig. 6 is other embodiment that disposes the light transmission lid of the optical devices that relate to of the utility model.
Fig. 7 is the general profile chart that the embodiment of the optical devices that the utility model relates to is shown.
Fig. 8 is the general profile chart of embodiment that the light transmission lid of the optical devices that the utility model relates to is shown.
Fig. 9 is the concept structure figure of the short-arc mercury lamp illuminating part of the optical devices that relate to of the utility model.
Figure 10 is the synoptic diagram of electrode of the short-arc mercury lamp of the optical devices that relate to of the utility model.
Figure 11 is the general profile chart that existing optical devices are shown.
Embodiment
Optical devices of the present utility model possess principal reflection mirror 20, be configured in the secondary catoptron 30 of the open side of this principal reflection mirror 20, the light transmission lid 40 that on the optical axis of these pair catoptron 30 sides, disposes, in the space that is surrounded by secondary catoptron and light transmission lid, ultraviolet light secondary light source 50 is set, on in secondary catoptron and light transmission lid any one the ultraviolet light reflection function is set, even and the position that optical devices of the present utility model are configured to can not directly to arrive at the ultraviolet light from ultraviolet light secondary light source 50 illuminating part 11 of short-arc mercury lamp 10 is provided with under the situation of ultraviolet light secondary light source 50, also can make ultraviolet light arrive illuminating part 11 by the reflection of catoptron or light transmission lid.
That is to say, optical devices are characterised in that, even the ultraviolet light that is positioned at ultraviolet light secondary light source 50 can not directly arrive the position of short-arc mercury lamp illuminating part 11, also can come one or many ground to reflect to arrive short-arc mercury lamp illuminating part 11 by being arranged at ultraviolet light reflection function that catoptron or light transmission cover.Utilize the description of drawings concrete structure hereinafter.
Fig. 1 represents the overall appearance figure of the optical devices that the utility model relates to.
Optical devices are made of short-arc mercury lamp 10, principal reflection mirror 20 and secondary catoptron 30.Principal reflection mirror 20 is configured to surround short-arc mercury lamp 10, and the electric arc direction of short-arc mercury lamp 10 is that the direction between the connection electrode front end is consistent with the optical axis of principal reflection mirror 20.In addition, principal reflection mirror 20 is the ellipse of revolution structure, and the substantial middle of electrode is made as first focal position, and secondary catoptron 30 is made of spherical mirror, and this spherical mirror is got first focus identical with principal reflection mirror 20.
Short-arc mercury lamp 10 has the illuminating part 11 that is roughly spheroid and in the closure 12 (12a, 12b) at its two ends, a closure 12a is installed in neck (top) 24 places of principal reflection mirror 20.Fixedly can use heat resistant adhesive 25 etc. when short-arc mercury lamp 10 and principal reflection mirror 20, like that both are directly installed as shown in the figure, also can use lamp holder (レ Off ベ one ス as other parts, not shown) etc., short-arc mercury lamp 10 is installed on the lamp holder, and this lamp holder is fixed on the principal reflection mirror 20.
On this pedestal, the hole that cooling air is passed through can also be set.
The reflecting part 22 of principal reflection mirror 20 is the ellipse of revolution face, forms concave (being roughly bowl-shape) on the whole.Principal reflection mirror 20 with pyroceram be pyrex as base material, form the inteferometer coating make visible light (VIS) and ultraviolet light (UV) reflect and infrared light (IR) is seen through on its inside surface.Particularly, inteferometer coating forms alternately stacked titania (TiO on base material
2) and silicon dioxide (SiO
2) and the film that obtains as ground floor, and on this ground floor, form alternately stacked hafnium oxide (HfO
2) and magnesium fluoride (MgF
2) and the film that obtains as the second layer.Thus, can in ground floor, reflect for example visible light of wavelength 400～700nm, in the second layer, reflect for example ultraviolet light of wavelength 200～400nm.
At this, the opening edge of preferred principal reflection mirror 20 and the opening edge of secondary catoptron 30 are unanimous on the whole.This is because principal reflection mirror 20 is the situation of the diameter minimum of optical devices with the roughly consistent state of the opening edge of secondary catoptron 30.In addition, because the light that secondary catoptron 30 is reflected returns short-arc mercury lamp 10 once more, and via principal reflection mirror 20 ejaculations, therefore the electrode separation of short-arc mercury lamp 10 is reduced by half in appearance substantially, the result has the advantage of the light source that can provide brighter.
Dispose light transmission lid 40 in the place ahead of principal reflection mirror 20.It is in order in short-arc mercury lamp 10 contingency damaged separation of fragments to take place to prevent under the damaged situation that light transmission lid 40 is set.
Light transmission lid is that the situation of what is called " flat board " on plane is more by the two sides, but can also use the lens that illustrate as an example in Fig. 5 (b) and Fig. 5 (c) shown in the back.By using such lens, can proofread and correct because the lens effect that the luminous containers thickness difference that uses in the illuminating part 11 is caused.Further, can also be transformed into the directional light that mainly in the LCD projection arrangement, uses to the light of assembling by oval shape mirror.That is to say, suitably select the shape of lens according to the purpose of projection arrangement.
Certainly, the combination of inteferometer coating is not limited to the combination that limits here, in addition, has under the situation of ultraviolet light reflection function at principal reflection mirror 20 and secondary catoptron 30, can omit inteferometer coating.In other words, the configuration of this inteferometer coating is the best of breed of selecting according to the installation site of ultraviolet light secondary light source 50.In like manner, can also omit the ultraviolet light reflection function of principal reflection mirror 20 and secondary catoptron 30 according to the installation site that ultraviolet light starts secondary light source 50.
In addition, this light supply apparatus is being assembled under the situation of actual projector etc., at the place ahead of light transmission lid 40 configuration liquid crystal panel or DLP with the rotation color filter.
Fig. 2 illustrates the figure that is used to illustrate the radiative travel condition of short-arc mercury lamp.In order to describe, establish principal reflection mirror 20, secondary catoptron 30 and euphotic cover 40 and possess the ultraviolet light reflection function, also be formed with the inteferometer coating of infrared light (IR) permeability on principal reflection mirror 20 and the secondary catoptron 30.
Comprise visible light (VIS), infrared light (IR) and ultraviolet light (UV) in the emission light of short-arc mercury lamp 10.The wavelength coverage of visible light (VIS) is about 400～700nm, and the wavelength coverage of infrared light (IR) is more than about 700nm, and the wavelength of ultraviolet light (UV) is approximately below the 400nm.In the drawings, represent to be incident to the light of catoptron or light transmission lid, represent visible light (VIS), represent infrared light (IR), represent ultraviolet light (UV) with little dotted line with big dotted line with dot-and-dash line with solid line.
In the emission light from short-arc mercury lamp, arrive light 53 reflect visible light (VIS) and ultraviolet light (UV) on secondary catoptron 30 of secondary catoptron 30, and see through infrared light (IR).
Then, arrive light 55 reflect visible light (VIS) and ultraviolet light (UV) on principal reflection mirror 20 of principal reflection mirror 20, and see through infrared light (IR).Although light 55 is the light from short-arc mercury lamp 10 direct outgoing, it also comprises the light that is reflected by secondary catoptron 30.
Further, the light that arrives light transmission lid 40 only sees through visible light (VIS) 51 in light transmission lid 40, and light reflection ultraviolet (UV) 52.
In the above description, the scheme that effectively utilizes from the radiative optical devices of short-arc mercury lamp 10 of the present utility model has been described, has the following describes the method for the startability of improving the ultraviolet light secondary light source.Fig. 3 is the figure that is used to illustrate the effect of ultraviolet light secondary light source.Because the structure of catoptron 20,30 and permeability lid 40 is structurally identical except the reflection function difference of these each parts, therefore omit respective description.The reflection function of each set catoptron and light transmission lid is shown.Principal reflection mirror 20 constitutes through infrared light (IR) and light reflection ultraviolet (UV) and visible light (VIS), secondary catoptron 30 constitutes through ultraviolet light (UV) and infrared light (IR) and reflect visible light, and light transmission lid 40 constitutes light reflection ultraviolet (UV) and infrared light (IR) and sees through visible light (VIS).
When the lamp device (not shown) of short-arc mercury lamp 10 was imported power supply, at first, ultraviolet light secondary light source 70 was luminous, to all the winds launches from the ultraviolet light of ultraviolet light secondary light source 70.Arrive lamp illuminating parts 11 as wherein a part of direct light 61.Ultraviolet light 63 by inteferometer coating 42 reflections on the base material 41 that is coated in light transmission lid 40 also arrives lamp illuminating part 11, in addition, also arrives lamp illuminating part 11 by 62 of 22 reflections of the inteferometer coating on the substrate 21 that is coated in principal reflection mirror 20.Compare with the situation that direct light only 61 arrives, add up from the reflected light of a plurality of directions, thereby more high-intensity ultraviolet light arrives lamp illuminating part 11, has improved the property lighted.
In addition, ultraviolet light secondary light source 70 is arranged on the non-reflecting surface that does not dispose the catoptron that principal reflection mirror 20, secondary catoptron 30 etc. reflect visible light, therefore can be with efficient utilization from the short-arc mercury lamp visible light emitted.
In addition, non-reflecting surface in the utility model is to connect the reflecting surface of this light supply apparatus and the part of reflecting surface, it is the part that reflection of light is not had contribution, in the present embodiment, non-reflecting surface is the part of face that connects a side that is provided with inteferometer coating of this pair catoptron (30) and this light transmission lid (40), is the part of inteferometer coating interruption.In addition, as this non-reflecting surface, except that above-mentioned, represent that also this principal reflection mirror (20) upward keeps the neck of this short-arc mercury lamp (10), further, expression connects the part part of this principal reflection mirror (20) and this pair catoptron (30), that inteferometer coating is interrupted etc.
Use the structure of 71 pairs of ultraviolet light secondary light sources 70 of ultraviolet light secondary light source of shape shown in Figure 4 to describe.To in its surperficial two ends configuration pair of external electrodes 701, in luminous containers, add the rare gas of argon (Ar), xenon (Xe), neon (Ne) etc., and enclose more than one nitrogen (N through the quartz glass tube of ultraviolet light as luminous containers 700
2) or helium (He).In addition, if together enclose mercury, then can utilize penning (Penning) effect to reduce and light voltage.In addition, also can utilize in position and apply high pressure and the atmospheric discharge that produces, also can utilize other UV-light luminous light sources such as the light emitting diode of emission ultraviolet light or laser instrument the electrode setting.
Fig. 5 illustrates the embodiment (a)～(c) of the light transmission lid 40 that the utility model relates to.The left side that the light transmission lid is shown respectively is the plane of incidence of light, and the right side is the exit facet of light, and the situation that is formed with the inteferometer coating 42 that the ultraviolet light from the ultraviolet light secondary light source is reflected is shown.(a) situation of sheet glass is shown, has the effect of dispersing when preventing breakage.(b) be aspheric situation, it illustrates correction and makes the equally distributed situation of light by the lens effect that luminous containers caused of short-arc mercury lamp.(c) be the situation of the shape of two curved surfaces of combination on the plane of incidence, it illustrates correction and makes the equally distributed situation of light by the lens effect that luminous containers caused of short-arc mercury lamp.
The light that uses Fig. 6 explanation in Fig. 5 (a) and Fig. 5 (c), to penetrate.The latter half of Fig. 6 illustrates the state of the light transmission lid of Fig. 5 (a), and the first half of Fig. 6 illustrates the state of the light transmission lid of Fig. 5 (c).In addition, the ray trajectory of Fig. 5 (a) is shown, the ray trajectory of Fig. 5 (c) is shown with solid line with wave-like line.
Covering under the situation of 41a and 41c incident to light transmission with same angle, light transmission lid 41a incident and shooting angle do not change, and the thickness that light transmission lid 41c covers according to light transmission reflects, and incident and shooting angle change, and are concentrated on P1 and P2 respectively.At this moment, the density of light is represented with 67 and 68 parts of being surrounded.There is deviation in the emergent light density of the lid of light transmission shown in it 41a, and the situation lower density 68 of light transmission lid 41c is even.That is to say that it is inhomogeneous wherein to be illustrated in focal point P1 punishment cloth, and is evenly distributed at focal point P2.In other words, this means that light transmission lid 41c can have equally distributed light from optical devices output.Go into the advantage of light more uniformly by using this light transmission lid, having under the situation that does not increase optical devices itself to the projection arrangement side-draw.
Fig. 7 is the embodiment that has changed the situation of the material of employed secondary catoptron 30 in the optical devices of the present utility model and shape.As above-mentioned embodiment shown in Figure 1 in, show in the secondary catoptron 30 example of pyrex, and shown in Figure 7 the embodiment of aluminium as base material as base material.By identical with Fig. 1 except secondary catoptron 30 changes in catoptron 20,30 and permeability lid 40 structures that constitute, therefore omitted corresponding explanation.
Wait by aluminium rotary pressing processing, punch process, cut and to make secondary catoptron 30, and formation and the identical shaped rotary reflection face of Fig. 1.Under the situation that pyrex is used as base material, need carry out processing as the inteferometer coating of reflection part, but in the present embodiment that is manufactured from aluminium, can inteferometer coating be set and directly use the aluminium face, the full wave light that reflection is launched from short-arc mercury lamp 10, and can also reflect from the ultraviolet light of ultraviolet light secondary light source 71 emissions.
In addition, although can reflecting surface not carried out any processing and use, can also implement to be used to protect the alumite of reflecting surface to handle or silicon dioxide (SiO
2) film processing back use.The processing part of this explanation be Fig. 7 32 shown in part.In this case, also can reflect the full wave light that sends from short-arc mercury lamp 10.
Further, with pyrex is identical as the situation that base material uses, also can form reflectance coating by inteferometer coating no problemly.
In addition, by being formed from aluminium described secondary catoptron 30, can realize thin-walled property.Therefore the pyrex base material needs the thickness about 4mm, and the thickness of aluminium base can extremely thinly reach about 1mm, can realize lightweight, even and also can not produce the problem on the physical strength and use under the situation of wall attenuation.By making the wall thickness attenuation, when adopting same external diameter, can increase the open side size that does not hinder the secondary catoptron that penetrates light, thereby can increase the light beam that can capture.
Further, directly compare with the opening of described principal reflection mirror 20, the internal diameter of this pair catoptron 30 is bigger, can form the circular portion 26 of the hollow that does not overlap between the two at both mating surface places.Part at the circular portion 26 of this hollow is provided with recess, can in this recess 27 ultraviolet light secondary light source 71 be set.The circular portion 26 of this hollow and this recess 27 become the non-reflecting surface in the utility model.Fig. 4 is the figure that the state that is provided with in the A-A section is shown.Can make the shape of ultraviolet light secondary light source 71 become the crescent shape that goes out as shown in this figure according to the state of setting.
By being formed on the state that is provided with shown in the present embodiment, illuminating part 11 inside that arrive short-arc mercury lamp 10 from the ultraviolet light of this ultraviolet light secondary light source 71 can be under the situation that does not hinder above-mentioned short-arc mercury lamp 10 and both light paths of above-mentioned catoptron, can made, thereby the startability of lamp can be improved.
Like this,, under the situation that does not change the optical devices external diameter, uses embodiment shown in Figure 7 the example of optical devices although illustrating the component differences of utilizing this principal reflection mirror 20 and this pair catoptron 30, certainly, internal diameter except this pair catoptron 30, its external diameter is set to the external diameter greater than principal reflection mirror 20, then also can similarly form recess 27 and this ultraviolet light secondary light source 71 is set at the opening side end face place of principal reflection mirror 20 with Fig. 7.
Fig. 8 is the figure that the situation of advancing of ultraviolet light under the situation that above-mentioned secondary catoptron 30 uses aluminiums and internal diameter that should pair catoptron 30 embodiment bigger than the opening footpath of above-mentioned principal reflection mirror 20 is shown.Identical with Fig. 1 except secondary catoptron 30 changes by principal reflection mirror 20, secondary catoptron 30 and permeability lid 40 structures that constitute, therefore omit corresponding explanation.
Show the reflection function of each catoptron that sets and light transmission lid.Principal reflection mirror 20 constitutes through ultraviolet light (UV) and infrared light (IR) and reflect visible light (VIS), owing to constitute secondary catoptron 30 by using aluminium and implementing alumite processing 32, so its reflect visible light (VIS), ultraviolet light (UV) and infrared light (IR), light transmission lid 40 constitutes light reflection ultraviolet (UV) and infrared light (IR) and sees through visible light (VIS).
When the lamp device (not shown) of short-arc mercury lamp 10 was imported power supply, initial ultraviolet light secondary light source 71 was luminous, to all the winds launches from the ultraviolet light of ultraviolet light secondary light source 71.Ultraviolet light secondary light source 71 is arranged in the recess 27, and therefore the direct light of launching from ultraviolet light secondary light source 71 can not arrive lamp illuminating part 11.But the ultraviolet light 65 that is reflected by the inteferometer coating 42 on the base material 41 that is coated in light transmission lid 40 arrives lamp illuminating parts 11, and further, the ultraviolet light 66 that is reflected by the substrate 31 of secondary catoptron 30 also arrives lamp illuminating part 11.
Even can not arrive lamp illuminating part 11 constituting direct light, also can utilize efficiently under the situation (not having state) of the radiative optical devices of short-arc mercury lamp 10 by ultraviolet light, in the startup of short-arc mercury lamp 10, can not go wrong from the light stimulus of outside from catoptron or the reflection of light transmission lid.
Fig. 9 illustrates the one-piece construction of short-arc mercury lamp 10.Short-arc mercury lamp 10 is so-called short arc discharge lamps, has to be roughly illuminating part 11 spherical, that form by the discharge vessel that is made of quartz glass.In this illuminating part 11, form emitting space, in the space, dispose the electrode 13b of same shape relatively with the interval of 0.5mm～2mm.Be formed with closure 12 (12a, 12b) at the both ends of illuminating part 11, in this closure 12, bury the conduction metal forming of making by molybdenum 15 (15a, 15b) airtightly underground by for example collapsed seal.One end of metal forming 15 (15a, 15b) engages with the axial region of electrode 13 (13a, 13b), and in addition, the other end of metal forming 15 engages with outside lead 14 (14a, 14b), thereby can be from the electric supply installation power supply of outside.In illuminating part 11, enclose mercury, rare gas and halogen gas are arranged.Mercury is used to obtain for example emission light of wavelength 300～360nm of required ultraviolet wavelength, encloses 0.15mg/mm
3Above, be specially 0.15～0.25mg/mm
3Mercury.This enclosed volume reaches the high vapor pressure more than the 8MPa according to temperature conditions and different when lighting.
Rare gas is for example enclosed the argon gas of about 13kPa.Its function is to improve lights startability.Enclosing iodine, bromine, chlorine etc., thereby enclose halogen with the mode of the compound of mercury or other metal.The enclosed volume of halogen is 5 * 10
-5～7 * 10
-3μ mol/mm
3Scope in select.The function of halogen is to utilize so-called halogen cycle to obtain long lifetime, when minimal type and height are lighted vapor pressure as discharge short-arc mercury lamp of the present utility model, prevents the effect of the devitrification of discharge vessel in addition.The numerical example of short-arc mercury lamp is shown, and for example, the maximum outside diameter of illuminating part 11 is 9.5mm, and electrode separation is 1.5mm, and the luminotron internal volume is 75mm
3, rated power is 200W, exchanges with 350Hz and lights.
In addition, this short-arc mercury lamp is built in the projection arrangement of miniaturization, requires the overall dimensions minimal typeization, also demanding amount of emitted light.Therefore, the heat affecting in the illuminating part is very strict.The tube wall load value of lamp is 0.8～2.0W/mm
2, be specially 1.5W/mm
2Press and the tube wall load value owing to have high like this mercury vapor, therefore, can provide colour rendering good light carrying the such demonstration of projection arrangement or elevated projecting with under the situation of equipment.In addition, the type of drive of short-arc mercury lamp is not limited to exchange and lights, and also can be that direct current is lighted.
Figure 10 is the synoptic diagram that electrode front end and jut are shown.The front end of electrode 13 (end relative with another electrode) forms projection 2b along with lighting of short-arc mercury lamp.Although may not be accurate, the phenomenon that forms projection 2b can be speculated as follows.That is to say, in the lighting of short-arc mercury lamp, the halogen that exists near the tungsten (constituent material of electrode) of the evaporation of the high-temperature part the electrode front end and the luminotron or residual oxygen combines and as the tungsten compound existence, for example, if halogen is Br, then be WBr, WBr
2, WO, WO
2, WO
2Br, WO
2Br
2Deng the tungsten thing.Be decomposed into tungsten atom or kation in the high-temperature portion near the gas phase of these compounds electrode front end.These tungsten atoms etc., because high-temperature portion from gas phase is that near the tungsten atom diffusion phenomena low-temp. portion is the electrode front end are so-called temperature diffusion and tungsten atom ionization in electric arc becoming kation and owing to carry out the electric field of negative electrode when moving and be attracted to the so-called drift phenomenon of the phenomenon of cathode direction in the electric arc, it is big that tungsten vapour density near the electrode front end the gas phase becomes, in electrode front end place deposition, thereby form projection.
According to Figure 10, electrode 13 is made of bulb 2a and axial region 2c, forms projection 2b at the front end place of bulb 2a.Even the time there is not projection 2b in the beginning of lighting in short-arc mercury lamp, but, we can say and to form this projection 2b by nature by lighting subsequently.At this, be not that all discharge lamps all can produce projection 2b.In electrode separation is to enclose in 1mm～2mm, the illuminating part 0.08mg/mm is arranged
3Above mercury, rare gas, 5 * 10
-5～7 * 10
-3μ mol/mm
3Scope in the short arc discharge lamp of halogen in, the projection phenomenon can take place, along with lighting of lamp, form projection 2b, and between projection 2b, form electric arc.
Like this, owing to form projection at the electrode place, in order to prevent to be heated unusually by the back light from the outside, short-arc mercury lamp of the present utility model makes infrared light (IR) can not turn back to illuminating part.
See through emission light as long as can reflect from the emission light of short-arc mercury lamp or according to wavelength, the principal reflection mirror 20, secondary catoptron 30 and the euphotic cover 40 that then form optical devices of the present utility model are not limited to above-mentioned certain embodiments.But,, preferably use thermotolerance, parts that anti-intensive properties is good from being used for the meaning of projection arrangement.Particularly, principal reflection mirror 20 adopts pyrex, quartz glass etc. as base material, and secondary catoptron 30 can also use heat-resistant resin materials such as metal material, polyimide resin such as aluminium except using the material of principal reflection mirror 20.Especially, require principal reflection mirror 20 to have stable on heating reason and be, principal reflection mirror 20 is heated by the heat from lamp near lamp illuminating part 11, and therefore principal reflection mirror 20 reaches about 400 ℃ high temperature when lamp is lighted.In addition, require the reason of anti-intensive properties to be,, also can prevent catoptron breakage itself, thereby the fragment etc. that can prevent short-arc mercury lamp effectively disperses even when lighting just in case under the situation of short-arc mercury lamp breakage.
In addition, except said structure, light transmission can also be covered 40 be configured to from the front surface opening portion of secondary catoptron 30 from.In this case, the advantage that can blow cooling air towards the closure 12 of short-arc mercury lamp 10 is arranged.Further, can also substitute the light transmission lid and the lens that use in the projection arrangement that is made of optical devices are installed.By such structure, can further realize miniaturization.
Claims (4)
1. optical devices comprise:
Short-arc mercury lamp (10) is made of illuminating part with pair of electrodes and the closure that is arranged on the two ends of this illuminating part;
Principal reflection mirror (20) is made of the ellipse of revolution face, and it is consistent with the electric arc direction of described short-arc mercury lamp (10) to be configured to optical axis, and the state that roughly is formed between the described electrode with first focus surrounds described short-arc mercury lamp (10);
Secondary catoptron (30), constitute by spherical mirror, be configured to surround the peristome of described principal reflection mirror (20), and be used to make from described short-arc mercury lamp (10) to the open side of described principal reflection mirror (20) directly the light of emission towards described principal reflection mirror (20) secondary reflection again;
Peristome is set on the described secondary catoptron (30), is used to make the light from described principal reflection mirror (20) reflection to pass through;
Light transmission lid (40) is set on the described peristome; And
The ultraviolet light reflection function, be set in described principal reflection mirror (20), described secondary catoptron (30) and the described light transmission lid (40) at least on any one,
Described optical devices are characterised in that,
In the space that surrounds by described principal reflection mirror (20), described secondary catoptron (30), described light transmission lid (40) and non-reflecting surface, dispose ultraviolet light secondary light source (70,71).
2. optical devices according to claim 1 is characterized in that,
Described ultraviolet light secondary light source is configured in the surface of described non-reflecting surface.
3. optical devices according to claim 1 is characterized in that,
Described principal reflection mirror (20) side opening of described secondary catoptron (30) footpath than the opening footpath of described principal reflection mirror (20) greatly or about equally, and the maximum outside diameter of described secondary catoptron (30) is less than the maximum outside diameter of described principal reflection mirror (20).
4. a projection arrangement is characterized in that, has any described optical devices in the claim 1 to 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-088636 | 2010-04-07 | ||
| JP2010088636A JP2011222217A (en) | 2010-04-07 | 2010-04-07 | Optical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202003132U true CN202003132U (en) | 2011-10-05 |
Family
ID=44705868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200999883U Expired - Lifetime CN202003132U (en) | 2010-04-07 | 2011-04-06 | Optical device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2011222217A (en) |
| CN (1) | CN202003132U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154490A (en) * | 2014-07-15 | 2014-11-19 | 无锡启晖光电科技有限公司 | Secondary reflection device of stage lamp/projection lamp |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013224237A (en) * | 2012-04-23 | 2013-10-31 | Univ Of Yamanashi | Multi-light source centralized heating apparatus |
| KR20230163552A (en) * | 2021-04-16 | 2023-11-30 | 우시오덴키 가부시키가이샤 | ultraviolet ray generator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07159897A (en) * | 1993-12-07 | 1995-06-23 | Nippondenso Co Ltd | Light source device |
| JP4722312B2 (en) * | 2001-03-30 | 2011-07-13 | 三菱電機株式会社 | Lamp, condensing optical system, and image display device |
| JP4134793B2 (en) * | 2002-08-20 | 2008-08-20 | ウシオ電機株式会社 | Light source device |
| JP5236871B2 (en) * | 2006-06-16 | 2013-07-17 | 株式会社島津製作所 | Light source device |
-
2010
- 2010-04-07 JP JP2010088636A patent/JP2011222217A/en active Pending
-
2011
- 2011-04-06 CN CN2011200999883U patent/CN202003132U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154490A (en) * | 2014-07-15 | 2014-11-19 | 无锡启晖光电科技有限公司 | Secondary reflection device of stage lamp/projection lamp |
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| Publication number | Publication date |
|---|---|
| JP2011222217A (en) | 2011-11-04 |
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