CN1892413A - Optical device and projector - Google Patents

Optical device and projector Download PDF

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Publication number
CN1892413A
CN1892413A CN 200610100555 CN200610100555A CN1892413A CN 1892413 A CN1892413 A CN 1892413A CN 200610100555 CN200610100555 CN 200610100555 CN 200610100555 A CN200610100555 A CN 200610100555A CN 1892413 A CN1892413 A CN 1892413A
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China
Prior art keywords
light
mentioned
transparent member
emitting side
polaroid
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CN 200610100555
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Chinese (zh)
Inventor
桥爪俊明
矢内宏明
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Seiko Epson Corp
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Seiko Epson Corp
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Abstract

The invention provides a better optical device which can inhibit the degradation of image quality due to temperature increasing of polaroid sheet. The optical device includes: liquid crystal devices (410R, 410G, 410B); crossing color separation prism(500); incident side polaroids (420R, 420G, 420B) at least with polarization layer configured on light emergent side of the liquid crystal devices (410R, 410G, 410B); emergent side polaroids (440R, 440G, 440B) at least with polarization layer configured on light emergent side of the liquid crystal devices (410R, 410G, 410B); first light transmission component (450R, 450G, 450B) respectively adhered to surface of light incident side of the emergent side polaroids (440R, 440G, 440B); the surface of light emergent side of the emergent side polaroids (440R, 440G, 440B) respectively adhered to light incident end surface of the crossing color separation prism(500).

Description

Optical devices and projector
Technical field
The present invention relates to optical devices and projector.
Background technology
In the projector that has as the liquid-crystal apparatus of electro-optic modulation arrangement, the light incident side of liquid-crystal apparatus dispose polaroid as the polarizer (below, be also referred to as the light incident side polaroid), dispose polaroid as analyzer (below, be also referred to as the emitting side polaroid) at the light emitting side of liquid-crystal apparatus.Yet, in the emitting side polaroid, because the light by the emitting side polaroid is not absorbed in inside, so, a large amount of heat takes place, thereby causes the temperature rising of emitting side polaroid.Therefore, emitting side polaroid deterioration, the polarization characteristic of emitting side polaroid reduces, thereby such problem occurs: the contrast of projected image is reduced or take place that contrast is fuzzy, color blurring etc., the image quality of projected image is reduced.
Therefore, as the projector that is used to solve such problem, disclose that the transparency carrier that has heat conductivity pastes on the cross dichroic prism and and then with the projector (for example, referring to patent documentation 1 and 2) of the structure of emitting side polarizing plate sticking to the transparency carrier of this heat conductivity.According to this projector, the heat that takes place in the emitting side polaroid is by the cross dichroic prism diffusion capacious of the transparency carrier thermotropism of heat conductivity, so the temperature that can suppress the emitting side polaroid rises.Therefore, thus can suppress the phenomenon that the polarization characteristic of emitting side polaroid deterioration emitting side polaroid reduces.Its result, the contrast that can suppress projected image reduces, thereby takes place that contrast is fuzzy, phenomenon that image quality that color blurring etc. makes projected image reduces.
[patent documentation 1] spy opens the 2002-90873 communique
[patent documentation 2] spy opens the 2000-352615 communique
But, in projector in recent years, along with projector is further realized high brightnessization, more than ever before heat takes place in the emitting side polaroid, thereby than the easier temperature rising that causes the emitting side polaroid in the past.Therefore, cause easily owing to the temperature of the emitting side polaroid emitting side polaroid deterioration that causes that rises reduces the polarization characteristic of emitting side polaroid, the contrast of projected image is reduced, take place that contrast is fuzzy, color blurring etc., thus the problem that the image quality of projected image is reduced.
Such problem is not only as the problem in the emitting side polaroid of analyzer, and also has same problem for the light incident side polaroid as the polarizer.That is,, there is same problem to all polaroids.
Summary of the invention
Therefore, the present invention's motion in order to solve such problem, purpose aims to provide can be than more suppressing in the past because optical devices and projector that the image quality of the projected image that the rising of the temperature of polaroid causes reduces.
Optical devices of the present invention are characterised in that: have a plurality of liquid-crystal apparatus of modulating a plurality of coloured light according to image information respectively; Will be by the synthetic cross dichroic prism of each coloured light of above-mentioned a plurality of liquid-crystal apparatus modulation; Be configured in the light incident side separately of above-mentioned a plurality of liquid-crystal apparatus, have a plurality of light incident side polaroids of polarization layer at least; Be configured in the light emitting side separately of above-mentioned a plurality of liquid-crystal apparatus, have a plurality of emitting side polaroids of polarization layer at least; Be adhered to the 1st transparent member of the face of the light incident side of at least 1 emitting side polaroid in above-mentioned a plurality of emitting side polaroid respectively; Wherein, above-mentioned cross dichroic prism has a plurality of light-incident ends and the light ejaculation end face that penetrate synthetic coloured light of difference incident by the coloured light of above-mentioned a plurality of liquid-crystal apparatus modulation, and the face of the light emitting side of above-mentioned at least 1 emitting side polaroid and the light-incident end of above-mentioned cross dichroic prism are bonding.
Projector of the present invention is characterised in that: have a plurality of liquid-crystal apparatus of modulating a plurality of coloured light according to image information respectively; Will be by the synthetic cross dichroic prism of each coloured light of above-mentioned a plurality of liquid-crystal apparatus modulation; Projection is by the projection optical system of the synthetic light of above-mentioned cross dichroic prism; Be configured in the light incident side separately of above-mentioned a plurality of liquid-crystal apparatus, have a plurality of light incident side polaroids of polarization layer at least; Be configured in the light emitting side separately of above-mentioned a plurality of liquid-crystal apparatus, have a plurality of emitting side polaroids of polarization layer at least; Be adhered to the 1st transparent member of the face of the light incident side of at least 1 emitting side polaroid in above-mentioned a plurality of emitting side polaroid respectively; Wherein, above-mentioned cross dichroic prism has a plurality of light-incident ends and the light ejaculation end face that penetrate synthetic coloured light of difference incident by the coloured light of above-mentioned a plurality of liquid-crystal apparatus modulation, and the face of the light emitting side of above-mentioned at least 1 emitting side polaroid and the light-incident end of above-mentioned cross dichroic prism are bonding.
Therefore, according to optical devices of the present invention or projector, owing to be bonded with the 1st transparent member on the face of the light incident side (liquid crystal device side) of at least 1 emitting side polaroid in a plurality of emitting side polaroids, the light-incident end of the face of the light emitting side (opposition side of liquid-crystal apparatus) of emitting side polaroid and cross dichroic prism is bonding simultaneously, so, can make the heat that in the emitting side polaroid, takes place from the emitting side polaroid two towards the 1st transparent member and cross dichroic prism transmission.Therefore, the temperature that can suppress the emitting side polaroid rises.In addition, owing to the emitting side polaroid does not contact with outer gas, so, can suppress immersion from the moisture of outer gas.Therefore, can suppress owing to the temperature of emitting side polaroid rises and the expansion and the distortion of the supporting layer of the emitting side polaroid that causes from the immersion of the moisture of outer gas, thereby the molecular orientation that can suppress supporting layer gets muddled.Its result, the polarization characteristic that can suppress the emitting side polaroid reduces the quality reduction of the light beam that passes through the emitting side polaroid that causes.
Therefore, by these optical devices are applied to for example projector, can more can suppress because the projector that the image quality of the projected image that the temperature rising of emitting side polaroid causes reduces by constituent ratio projector in the past.
In addition, according to optical devices of the present invention or projector,, rise the effect of the heat dispersion of raising projector so suppress the temperature of emitting side polaroid in addition because the bigger cross dichroic prism of emitting side polaroid and ratio of heat capacities is bonding.
In optical devices of the present invention or projector, the above-mentioned mat woven of fine bamboo strips 1 transparent member and above-mentioned emitting side polaroid and above-mentioned cross dichroic prism preferably utilize sticker and bonding agent bonding respectively.
By adopting such structure, surface reflection takes place in the interface that can suppress between each parts, thereby can improve light transmission rate.Its result, the brightness that can improve projected image.
In addition, even the linear expansion coefficient of the 1st transparent member, emitting side polaroid and intersection branch prism is not respectively not simultaneously, the mutual stickup face between each parts also is difficult for peeling off, thereby can suppress the reduction of long-term reliability.
In optical devices of the present invention or projector, above-mentioned a plurality of emitting side polaroids preferably only have the supporting layer of supporting above-mentioned polarization layer at the light emitting side of above-mentioned polarization layer.
By adopting such structure, the molecular orientation of the supporting layer of light incident side can not get muddled.That is, between polarization layer and liquid-crystal apparatus, can not exist because the birefringence that the distortion of the heat of supporting layer causes, so the light of being modulated by liquid-crystal apparatus is just with its original state arrival polarization layer.Therefore, thus can be owing to the rise polarization characteristic that make the emitting side polaroid of the temperature of emitting side polaroid significantly reduces the image quality of projected image is significantly reduced.At this moment, even hypothesis reduces a little because temperature rising causes the polarization characteristic of the supporting layer of light emitting side, the reduction of this polarization characteristic can be at polarization layer by analyzing yet, so, the image quality of projected image is significantly reduced.
And, in optical devices of the present invention or projector, as mentioned above, the face of the light incident side of at least one the emitting side polaroid in the 1st transparent member and a plurality of emitting side polaroid is bonding, and, because the light-incident end of the face of the light emitting side of at least one emitting side polaroid and cross dichroic prism is bonding, so, even a plurality of emitting side polaroids are respectively the structure that only has supporting layer at the light emitting side of polarization layer, the also physical strength that can obtain stipulating.
In optical devices of the present invention or projector, above-mentioned a plurality of emitting side polaroids also can be the polaroids with structure of the supporting layer that has omitted the light emitting side.
In optical devices of the present invention or projector, the preferred supporting layer that only has the above-mentioned polarization layer of support of above-mentioned a plurality of light incident side polaroids at the light incident side of above-mentioned polarization layer.
By adopting such structure, the molecular orientation of the supporting layer of light emitting side (liquid crystal device side) can not get muddled.That is, between polarization layer and liquid-crystal apparatus, can not exist because the birefringence that the distortion of the heat of supporting layer causes, so light consistent with the linearly polarized light that has optical axis in the direction of stipulating in polarization layer just transmits to liquid-crystal apparatus with its original state.Therefore, thus can be owing to the rise polarization characteristic that make the light incident side polaroid of the temperature of light incident side polaroid significantly reduces the image quality of projected image is significantly reduced.At this moment, owing to causing the polarization characteristic of the supporting layer of light incident side (opposition side of liquid-crystal apparatus), the temperature rising reduces a little even suppose, the reduction of this polarization characteristic also will be by the polarization layer compensation of light incident side polaroid, thereby can be by the polarization layer analyzing mistakenly of emitting side polaroid, so, the image quality of projected image is significantly reduced.
In optical devices of the present invention or projector, above-mentioned a plurality of light incident side polaroids also can be the polaroids with structure of the supporting layer that has omitted light incident side.
In optical devices of the present invention or projector, above-mentioned the 1st transparent member is preferably by sapphire or the quartzy light-transmitting substrate that constitutes.
The heat conductivity of the light-transmitting substrate that is made of these materials is very excellent, so, can be with the heat that in the emitting side polaroid, takes place effectively to system's external diffusion, thus the deterioration of the polarization characteristic that causes can further be suppressed because the temperature of emitting side polaroid rises.
In optical devices of the present invention or projector, preferably be configured to by above-mentioned sapphire or the optic axis of the quartzy light-transmitting substrate that constitutes and the polarization axle almost parallel or the approximate vertical of above-mentioned polarization layer by above-mentioned sapphire or the quartzy above-mentioned relatively emitting side polaroid of light-transmitting substrate that constitutes.
As the 1st transparent member,,, can not change by polarized state of light by sapphire or the quartzy light-transmitting substrate that constitutes by adopting said structure even use by sapphire or the quartzy light-transmitting substrate that constitutes yet.
In addition, by making big axially consistent of thermal expansion by sapphire or the quartzy light-transmitting substrate that constitutes, can suppress the thermal deformation of emitting side polaroid with the bearing of trend of emitting side polaroid.
In optical devices of the present invention or projector, the light-transmitting substrate that above-mentioned the 1st transparent member preferably is made of the sintered body of quartz glass, hard glass, sintered glass ceramics or cube crystalline substance.
Owing to the birefringence of the light-transmitting substrate that is made of these materials is little, so, quality reduction can be suppressed by the light beam of light-transmitting substrate.In addition, owing to the coefficient of thermal expansion of the light-transmitting substrate that is made of these materials is smaller, so, bonding by having with the light-transmitting substrate that constitutes by the little material of such coefficient of thermal expansion based on the emitting side polaroid of the big character of the stretching, extension/distortion of heat, can suppress the distortion of emitting side polaroid itself.
In this manual, so-called " polarization axle of polarization layer " is exactly the polarisation of light axle by polarization layer.
In projector of the present invention, further have a plurality of collector lenses of the light incident side separately that is configured in above-mentioned a plurality of liquid-crystal apparatus and be adhered to a plurality of the 2nd transparent members of face of the light emitting side of above-mentioned a plurality of light incident side polaroids.Wherein, the face of the light incident side of above-mentioned a plurality of light incident side polaroids is preferably bonding with the face of the light emitting side of above-mentioned a plurality of collector lenses respectively.
By adopting such structure, because a plurality of the 2nd transparent members are bonding with the face of the light emitting side of a plurality of light incident side polaroids respectively, simultaneously, the face of the light incident side of a plurality of light incident side polaroids is bonding with the face of the light emitting side of a plurality of collector lenses respectively, so, can make the heat that in the light incident side polaroid, takes place from the light incident side polaroid two towards the 2nd transparent member and collector lens transmission.Therefore, the temperature that can suppress the light incident side polaroid rises.In addition, owing to the light incident side polaroid does not contact with outer gas, so, can suppress immersion from the moisture of outer gas.Therefore, can suppress to rise and cause the expansion and the distortion of the supporting layer of light incident side polaroid, thereby the molecular orientation that can suppress supporting layer gets muddled from the immersion of the moisture of outer gas owing to the temperature of light incident side polaroid.Its result, thus the polarization characteristic that can suppress the light incident side polaroid reduces the quality reduction that can suppress by the light beam of light incident side polaroid.
Therefore, projector of the present invention is to suppress the projector that the image quality of the projected image that causes because the temperature of light incident side polaroid and emitting side polaroid rises reduces more than in the past projector.
In projector of the present invention, above-mentioned the 2nd transparent member is preferably by sapphire or the quartzy light-transmitting substrate that constitutes.
Owing to the heat conductivity of the light-transmitting substrate that is made of these materials is very excellent, so, can be with the heat that in the emitting side polaroid, takes place effectively to system's external diffusion, thus the deterioration of the polarization characteristic that causes can be suppressed because the temperature of emitting side polaroid rises.
In projector of the present invention, preferably be configured to by above-mentioned sapphire or the optic axis of the quartzy light-transmitting substrate that constitutes and the polarization axle almost parallel or the approximate vertical of above-mentioned polarization layer by above-mentioned sapphire or the quartzy above-mentioned relatively emitting side polaroid of light-transmitting substrate that constitutes.
As the 2nd transparent member,,, can not change by polarized state of light by sapphire or the quartzy light-transmitting substrate that constitutes by adopting said structure even use by sapphire or the quartzy light-transmitting substrate that constitutes yet.
In addition, by making, can suppress from the thermal deformation of light incident side polaroid by big axially consistent of sapphire or the quartzy thermal expansion that constitutes light-transmitting substrate with the bearing of trend of light incident side polaroid.
In projector of the present invention, the light-transmitting substrate that above-mentioned the 2nd transparent member preferably is made of the sintered body of quartz glass, hard glass, sintered glass ceramics or cube crystalline substance.
Owing to the birefringence of the light-transmitting substrate that is made of these materials is little, so, quality reduction can be suppressed by the light beam of light-transmitting substrate.In addition, owing to the coefficient of thermal expansion of the light-transmitting substrate that is made of these materials is smaller, so, bonding by having with the light-transmitting substrate that constitutes by the little material of such coefficient of thermal expansion based on the emitting side polaroid of the big character of the stretching, extension/distortion of heat, can suppress the distortion of light incident side polaroid itself.
In optical devices of the present invention or projector, as the 1st transparent member and the 2nd transparent member, also can use by other clear glasses (for example, the light-transmitting substrate of blank glass, パ イ Star Network ス formations such as (registered trademarks), the light-transmitting substrate that constitutes by the many crystallizations of YAG and light-transmitting substrate of constituting by aluminum oxynitride etc.
In projector of the present invention, further have each optical system is received into the hot heat-conduction component of transmission between inner casing and in above-mentioned the 1st transparent member at least 1 and the above-mentioned casing.
By adopting such structure, the heat that takes place in the emitting side polaroid spreads to casing by the 1st transparent member and heat-conduction component, so, can improve the heat dispersion of projector.
In projector of the present invention, further have each optical system is received into the hot heat-conduction component of transmission between inner casing and in above-mentioned the 2nd transparent member at least 1 and the above-mentioned casing.
By adopting such structure, the heat that takes place in the light incident side polaroid spreads to casing by the 2nd transparent member and heat-conduction component, so, can improve the heat dispersion of projector.
From so improve the angle of the heat dispersion of projector, be preferably between above-mentioned the 1st transparent member and the casing and between above-mentioned the 2nd transparent member and the casing heat-conduction component be set respectively.
Above-mentioned heat-conduction component preferably is made of metal.
In projector of the present invention, above-mentioned the 1st transparent member preferably only sees through from the light that above-mentioned liquid-crystal apparatus penetrates to have the linearly polarized light of optical axis and reflects other polarisation of light separate optical elements in the direction of stipulating.
By adopting such structure, direction in regulation from the light that liquid-crystal apparatus penetrates has the linearly polarized light of optical axis through the polarization separation optical element, project to by projection optical system on the projecting planes such as screen, on the other hand, other light will forbid that promptly the light of propagating to projection optical system (not seeing through the polarized component of polarization layer) by the reflection of polarization separation optical element, propagates into outside the system.Therefore, inciding the light that does not see through the polarized component of polarization layer in the light on the emitting side polaroid is almost removed by the polarization separation optical element as prime, so, can suppress the heating in the emitting side polaroid effectively, thereby the temperature that can more effectively suppress the emitting side polaroid rises.
In projector of the present invention, as above-mentioned polarization separation optical element, can use the wire grid type that the polarization separation optical element that is made of the dielectric multilayer film, a large amount of fine metal fine rules arrange the polarization separation optical element, use the polarization separation optical element etc. of XY type polarization film that will have the pellicular cascade multilayer of two direction of principal axis and make it to have the polarization characteristic of XY type.
In projector of the present invention, preferably be provided with the cooling air stream of above-mentioned the 1st transparent member of cooling.
By adopting such structure, can utilize the cooling air of cooling air stream to cool off the 1st transparent member, so the temperature that can suppress the 1st transparent member rises, thereby can remove the heat that takes place in the emitting side polaroid effectively.
At this moment, preferably and then the cooling air stream of above-mentioned the 2nd transparent member of cooling is set.
By adopting such structure, can be used to from cooling off the cooling air on distinguished and admirable road and then cooling off the 2nd transparent member, so the temperature that can suppress the 2nd transparent member rises, thereby can remove the heat that takes place in the light incident side polaroid effectively.
Description of drawings
Fig. 1 be the expression embodiment 1 projector 1000 optical system diagram.
Fig. 2 is the figure that is used to illustrate the optical devices 510 of embodiment 1.
Fig. 3 is the figure of major part that is used to illustrate the optical devices 510 of embodiment 1.
Fig. 4 is the figure of optical devices 512 that is used to illustrate the variation of embodiment 1.
Fig. 5 is the figure that is used to illustrate the optical devices 514 of embodiment 2.
Fig. 6 is the figure when seeing polarization separation optical element 460R peripheral part from the side.
Fig. 7 is the figure that is used to illustrate the projector 1006 of embodiment 3.
Fig. 8 is the figure that is used to illustrate the projector 1008 of embodiment 4.
Fig. 9 is the figure that is used to illustrate the projector 1010 of embodiment 5.
Symbol description
10 casings; The liner of 20 heat conductivities (spacer); 14,16 heat-conduction components; 20,40 polarization layers; 22,42 supporting layers; 100 lighting devices; The 100ax lighting optical axis; 110 light supply apparatuses; 112 luminotrons; 114 ellipsoidal reflector; 116 auxiliary mirrors; 118 parallelization lens; 120 the 1st lens arras; 122 the 1st lenslets; 130 the 2nd lens arras; 132 the 2nd lenslets; 140 polarized light conversion elements; 150 overlapping lens; 200 looks separate the leaded light optical system; 210,220 dichronic mirrors; 230,240,250 catoptrons; 260 light incident side lens; 270 relay lenss; 300R, 300G, 300B collector lens; 410R, 410G, 410B liquid-crystal apparatus; 412R, 412G, 412B414R, 414G, 414B glass substrate; 420R, 420G, 420B 422R, 422G, 422B light incident side polaroid; 430R, 430G, 430B the 2nd transparent member; 432R, 432G, 432B 452R, 452G, 452B liquid crystal device side transparent member; 440R, 440G, 440B 442R, 442G, 442B emitting side polaroid; 450R, 450G, 450B the 1st transparent member; 460R, 460G, 460B polarization separation optical element; 462R XY type polarization film; 464R, the 466R glass prism; The 468R light absorption units; 470R, 470G, 470B 480R, 480G, 480B opposes the side transparent member; 500 cross dichroic prism; 510,512,514,516,518,520 optical devices; 600 projection optical systems; 1000 projector; The C adhesive linkage; The D adhesive coating; The SCR screen.
Embodiment
Below, the embodiment shown in illustrates optical devices of the present invention and projector with reference to the accompanying drawings.
Embodiment 1.
Fig. 1 is the figure of optical system of the projector 1000 of expression embodiment 1.Fig. 2 is the figure that is used to illustrate the optical devices 510 of embodiment 1.Fig. 2 (a) is the figure when seeing optical devices 510 from above, and Fig. 2 (b) is the A-A sectional view of Fig. 2 (a).Fig. 3 is the figure of major part that is used to illustrate the optical devices 510 of embodiment 1.Figure (a) is the figure when seeing emitting side polaroid 440R peripheral part from the side, and Fig. 3 (b) is the figure when seeing light incident side polaroid 420R peripheral part from the side.
As shown in Figure 1, the projector 1000 of embodiment 1 is to have lighting device 100; The illuminating bundle of lighting device 100 is separated into 3 coloured light of red light, green light and blue light and separates leaded light optical system 200 to the look of illuminated regional leaded light; Have according to image information modulation by look separate 3 coloured light that leaded light optical system 200 separates as 3 liquid- crystal apparatus 410R, 410G of electro-optic modulation arrangement and 410B and will be by the optical devices 510 of the synthetic cross dichroic prism 500 of the coloured light of 3 liquid- crystal apparatus 410R, 410G and 410B modulation; Will be by the projection optical system 600 of the synthetic optical projection of cross dichroic prism 500 to the projecting planes such as screen SC R.These optical systems are accommodated in the casing 10.
Lighting device 100 comprises: as the light supply apparatus 110 that penetrates the light source of parallel illuminating bundle to illuminated area side; Have and be used for to be divided into the 1st lens arra 120 of a plurality of the 1st lenslets 122 of a plurality of segment beams from the illuminating bundle of light supply apparatus 110 ejaculations; The 2nd lens arra 130 with a plurality of 2nd lenslets 132 corresponding with a plurality of the 1st lenslets 122 of the 1st lens arra 120; To be transformed to the polarization conversion device 140 of a kind of linearly polarized light from the inconsistent illuminating bundle in polarization direction that light supply apparatus 110 penetrates; With the overlapping lens 150 that are used to make the each several part light beam that penetrates from polarization 140 at illuminated region overlapping.
Light supply apparatus 110 comprises the ellipsoidal reflector 114 as reverberator; Near the luminotron 112 of luminescent center the 1st focus of ellipsoidal reflector 114; Auxiliary mirror 116 with reflecting surface relative with the reflective concave surface of ellipsoidal reflector 114; With will be transformed to the concavees lens 118 of parallel light by the converging light of ellipsoidal reflector 114 reflection.It is the light beam of central shaft that light supply apparatus 110 penetrates with lighting optical axis 100ax.
The a pair of encapsulation that luminotron 112 has the pipe bulb and extends in the both sides in pipe bulb.
Ellipsoidal reflector 114 have the fixing tubular of the encapsulation of inserting the side be fixed in luminotron 112 capitulum and will be from the light of luminotron 112 emissions reflective concave surface to the reflection of the 2nd focal position.
The pipe bulb of luminotron 112 is clipped in the middle auxiliary mirror 116 and ellipsoidal reflector 114 relatively is provided with, and makes from the light of luminotron 112 emissions not that the light to ellipsoidal reflector 114 transmission returns luminotron 112, incides on the ellipsoidal reflector 114.
Concavees lens 118 are configured in the illuminated area side of ellipsoidal reflector 114.And, constitute make ellipsoidal reflector 114 wide and cause parallelization.
What the 1st lens arra 120 had that light with concavees lens 118 is divided into a plurality of segment beams cuts apart the function of optical element as light beam, and have with the face of lighting optical axis 100ax quadrature in have the structure that is arranged in rectangular a plurality of the 1st lenslets 122.Though omitted illustrated explanation,, the outer shape of the image forming area of the outer shape of the 1st lenslet 122 and liquid- crystal apparatus 410R, 410G, 410B is similar figures.
The 2nd lens arra 130 is optical elements of a plurality of segment beam optically focused that will be cut apart by the 1st lens arra 120, the same with the 1st lens arra 120, have with the face of lighting optical axis 100ax quadrature in have the structure that is arranged in rectangular a plurality of the 2nd lenslets 132.
Polarization conversion device 140 is that the changeable direction of polarization of the each several part light beam that will be cut apart by the 1st lens arra 120 is roughly a kind of polarization conversion device that linearly polarized light penetrates of polarization direction unanimity.
Polarization conversion device 140 comprises: the linearly polarized light composition that makes the side in the polarized component that comprises in the illuminating bundle from light supply apparatus 110 sees through and with the opposing party's the linearly polarized light composition polarization separation layer to the direction reflection vertical with lighting optical axis 100ax; The phase difference film that will become with the linearly polarized light that will be transformed to a side to the reflection horizon of the direction reflection parallel by the opposing party's of polarization separation layer reflection linearly polarized light composition by the opposing party's of reflective layer reflects linearly polarized light composition with lighting optical axis 100ax.
Overlapping lens 150 be with via a plurality of segment beam optically focused of the 1st lens arra the 120, the 2nd lens arra 130 and polarization 140 and near the image forming area of liquid- crystal apparatus 410R, 410G, 410B overlapping optical element.Overlapping lens 150 shown in Figure 1 are made of 1 lens, still, also can be made of the compound lens with a plurality of combination of lensess.
Look separates leaded light optical system 200 and comprises: dichronic mirror 210 and 220, catoptron 230,240 and 250, light incident side lens 260 and relay lens 270.Look separates leaded light optical system 200 and has 3 coloured light that will be separated into red light, green light and blue light from the illuminating bundle that lighting device 100 penetrates and the function that each coloured light is guided to the liquid-crystal apparatus 410R, the 410G that become lighting object, 410B.
Dichronic mirror 210 and 220 is the optical elements that are formed with the wavelength selective membrane of the light beam that sees through other wavelength region may to the light beam that reflects the wavelength region may of stipulating on substrate.The dichronic mirror 210 that is configured in the light path prime is reflection Red light components and see through the mirror of other coloured light composition.The dichronic mirror 220 that is configured in the light path prime is to see through the blue light composition and the mirror of reflection green light component.
, incide on the liquid-crystal apparatus 410R that red light uses by behind catoptron 230 warpages by the red light composition of dichronic mirror 210 reflection by collector lens 300R.On the other hand, see through the green light composition of dichronic mirror 210 and the green light composition in the blue light composition, incide on the liquid-crystal apparatus 410G that green light uses by collector lens 300G by dichronic mirror 220 reflections.In addition, the blue light composition that sees through dichronic mirror 220 by light incident side lens 260, relay lens 270 and catoptron 240 and 250 optically focused and warpage after.Incide on the liquid-crystal apparatus 410B that blue light uses by collector lens 300B.Light incident side lens 260, relay lens 270 and catoptron 240 and 250 have the function that the blue light composition that will see through dichronic mirror 220 direct into the liquid-crystal apparatus 410B that blue light uses.
Why such light incident side lens 260, relay lens 270 and catoptron 240 and 250 are set on the light path of blue light, being because the length of the light path of blue light is longer than the length of the light path of other coloured light, is in order to prevent because the diffusion of light etc. cause the utilization ratio reduction of light.In the projector 1000 of embodiment 1, because the length of the light path of blue light is long, so, adopted such structure, but, also can consider to make the length of light path of red light long, and light incident side lens 260, relay lens 270 and catoptron 240 and 250 are used for the structure of the light path of red light.
Optical devices 510 have: 3 liquid-crystal apparatus 410R, the 410G and the 410B that are separated 3 coloured light that leaded light optical system 200 separates according to image information modulation by look; Will be by the synthetic cross dichroic prism 500 of each coloured light of 3 liquid- crystal apparatus 410R, 410G and 410B modulation; Be configured in 3 collector lens 300R, 300G and the 300B of the light incident side of 3 liquid- crystal apparatus 410R, 410G and 410B; Be configured in 3 light incident side polaroid 420R, 420G and the 420B of the light incident side of 3 liquid- crystal apparatus 410R, 410G and 410B; 3 2nd transparent member 430R, 430G and the 430B bonding with the face of the light emitting side of 3 light incident side polaroid 420R, 420G and 420B; Be configured in 3 emitting side polaroid 440R, 440G and the 440B of the light emitting side of 3 liquid- crystal apparatus 410R, 410G and 410B; With 3 1st transparent member 450R, 450G and the 450B bonding with the face of the light incident side of 3 emitting side polaroid 440R, 440G and 440B.
Collector lens 300R is in order to be provided with for the light parallel with the chief ray of each several part light beam from the each several part optical beam transformation that the 2nd lens arra 130 penetrates.Collector lens 300R is kept by the holding member of not shown heat conductivity, and the holding member by this heat conductivity is arranged in the casing 10.The structure of other collector lens 300G and 300B is also the same with collector lens 300R.
Liquid- crystal apparatus 410R, 410G and 410B are the lighting objects of lighting device 100 according to the image information modulated illumination.
Each liquid- crystal apparatus 410R, 410G and 410B form enclosing between a pair of transparent glass substrate as the liquid crystal of electro-optical substance, for example, with multi-crystal TFT as on-off element, the polarization direction of the a kind of linearly polarized light that penetrates from light incident side polaroid 420R, 420G and 420B according to the image signal modulation of supplying with.Though diagram has been omitted liquid- crystal apparatus 410R, 410G and 410B,, be to hold them in the liquid-crystal apparatus that the die casting frame by for example aluminum constitutes to keep in the frame.
As shown in Figure 2, light incident side polaroid 420R, 420G and 420B are configured between collector lens 300R, 300G and 300B and liquid- crystal apparatus 410R, 410G and the 410B, have that linearly polarized light that the direction that only makes from the light that collector lens 300R, 300G and 300B penetrate in regulation has an optical axis sees through and the function that absorbs other light.
Shown in Fig. 3 (b), light incident side polaroid 420R has: the supporting layer 22 of polarization layer 20 and support polarization layer 20.And light incident side polaroid 420R is bonding by the light emergence face of adhesive linkage C and collector lens 300R, so that supporting layer 22 is positioned at the opposition side (collector lens 300R side) of the liquid-crystal apparatus 410R of polarization layer 20.As polarization layer 20, can use and for example polyvinyl alcohol (PVA) (PVA) be dyeed and carry out uniaxial extension and polarization layer that the molecules align of this dyestuff is formed in 1 direction with iodine or dichroic dye.The polarization layer 20 that forms like this absorbs the light of the direction parallel with above-mentioned uniaxial extension direction, and sees through the polarized light of the direction vertical with above-mentioned uniaxial extension direction.Polarization layer 20 is very big from the power that extension state reverts to original state, so, in order to limit this power, be provided with the supporting layer of supporting polarization layer 20.As supporting layer 22, can use the supporting layer that constitutes by triallyl cyanurate (TAC).Other light incident side polaroid 420G and the structure of 420B are also the same with light incident side polaroid 420R.
Liquid crystal device side (light emitting side) at light incident side polaroid 420R, 420G and 420B is respectively arranged with the 2nd transparent member 430R, 430G and 430B.The 2nd transparent member 430R, 430G and 430B are the light-transmitting substrates that is made of for example sapphire.The pyroconductivity of the light-transmitting substrate that is made of sapphire is up to about 40W/ (mK), and hardness is also very high, and coefficient of thermal expansion is little, is not easy to scratch the transparency height.For moderate brightness, when paying attention to cheapness, also can use light-transmitting substrate by the crystal formation of pyroconductivity with about 10W/ (mK).The thickness of the 2nd transparent member 430R, 430G and 430B is considered from the viewpoint of heat conductivity, more preferably greater than equaling 0.2mm, considers from the viewpoint of the miniaturization of device, preferably smaller or equal to 2.0mm.
Shown in Fig. 3 (b), the face of the face of the light incident side of light incident side polaroid 420R and the light emitting side of collector lens 300R is bonding by bonding (following) layer C.In addition, the face of the light incident side of the face of the light emitting side of light incident side polaroid 420R and the 2nd transparent member 430R is bonding mutually by adhesion (adhesion) layer D.Like this, can suppress the surface reflection at the interface between each parts, improve light transmission rate.Its result, the brightness that can improve projected image.In addition, even the linear expansion coefficient of the 2nd transparent member 430R, light incident side polaroid 420R and collector lens 300R is respectively different, the mutual bonding face between each parts also is difficult to peel off, thereby can suppress the decline of long-term reliability.The face of the face of the light incident side of light incident side polaroid 420R and the light emitting side of collector lens 300R also can be bonding mutually with sticker, and the face of the face of the light emitting side of light incident side polaroid 420R and the light incident side of the 2nd transparent member 430R also can be bonding mutually with bonding agent.The structure of the peripheral part of other light incident side polaroid 420G, the 420B also peripheral part with light incident side polaroid 420R is the same.
Around light incident side polaroid 420R, 420G and 420B, form adhesive linkage C.As the bonding agent that is used for adhesive linkage C, can use for example bonding agent of UV curable or the bonding agent of visible light short wavelength curable etc.
As shown in Figure 2, emitting side polaroid 440R, 440G and 440B are configured between liquid- crystal apparatus 410R, 410G and 410B and the cross dichroic prism 500, only have that the direction that sees through from the light that liquid- crystal apparatus 410R, 410G and 410B penetrate in regulation has the linearly polarized light of optical axis and the function that absorbs other light.
Shown in Fig. 3 (a), emitting side polaroid 440R has polarization layer 40 and supports the supporting layer 42 of polarization layer 40.And emitting side polaroid 440R is bonding by the light-incident end of adhesive linkage C and cross dichroic prism 500, makes supporting layer 42 be positioned at the opposition side (cross dichroic prism 500 sides) of the liquid-crystal apparatus 410R of polarization layer 40.As polarization layer 40 and supporting layer 42, can use identical materials with light incident side polaroid 420R.The structure of other emitting side polaroid 440G and 440B is also the same with emitting side polaroid 440R.
Liquid crystal device side (light incident side) at emitting side polaroid 440R, 440G and 440B is respectively arranged with the 1st transparent member 450R, 450G and 450B.On the face of the liquid crystal device side of the 1st transparent member 450R, 450G and 450B, be formed with not shown antireflection layer.The 1st transparent member 450R, 450G and 450B are also the same with the 2nd transparent member 430R, 430G and 430B, are the light-transmitting substrates that for example is made of sapphire.
Shown in Fig. 3 (a), the face of the light emitting side of the face of the light emitting side of the face of the light incident side of emitting side polaroid 440R and the 1st transparent member 450R and emitting side polaroid 440R and the light-incident end of cross dichroic prism 500 are undertaken bonding by adhesive linkage C respectively.Like this, can suppress the generation of the surface reflection at the interface between each parts, improve light transmission rate.Its result, the brightness that can improve projected image.In addition, even the linear expansion coefficient of the 1st transparent member 450R, emitting side polaroid 440R and cross dichroic prism 500 is different respectively, the mutual stickup face that also is difficult to take place between each parts is peeled off, thereby can suppress the reduction of long-term reliability.In addition, also can use sticker to replace bonding agent.The structure of the peripheral part of other emitting side polaroids 440G and the 440B also peripheral part with emitting side polaroid 440R is the same.
Around emitting side polaroid 440R, 440G and 440B, be formed with adhesive linkage C.
So that the mutually orthogonal mode of the direction of their polarization axle is set these light incident side polaroids of configuration 420R, 420G and 420B and emitting side polaroid 440R, 440G and 440B.
Cross dichroic prism 500 is that the optical image that will carry out modulation to each coloured light from each emitting side polaroid 440R, 440G and 440B ejaculation synthesizes and the optical element of formation coloured image.Shown in Fig. 2 (a), cross dichroic prism 500 has respectively incident and penetrates end face by 3 light-incident ends of the coloured light of liquid- crystal apparatus 410R, 410G and 410B modulation and the light that penetrates synthetic coloured light.Cross dichroic prism 500 is 4 right-angle prisms to be pasted mutually and the plane that forms is seen and is roughly foursquare shape, on the interface that is X shape roughly that right-angle prism is pasted mutually, is formed with the dielectric multilayer film.Be the roughly dielectric multilayer film reflection red light of a side's of X shape interface formation, the dielectric multilayer film reflect blue light that forms at the opposing party's interface.Red light and blue light flex into the direction consistent with the direct of travel of green light after by these dielectric multilayer films, thus synthetic 3 coloured light.
Cross dichroic prism 500 is set in the casing 10 by the liner 12 (referring to Fig. 2 (b)) of heat conductivity.
The coloured image that penetrates from cross dichroic prism 500 forms big picture image by projection optical system 600 enlarging projections on screen SC R.
Here, though diagram has been omitted, in projector 1000, be provided with at least 1 fan and a plurality of cooling air stream that are used to cool off each optical system etc.In projector 1000, circulate by these fans and a plurality of cooling air stream from projector 1000 outside inhaled airs, and discharge to the outside.As shown in Figure 2, promote optical devices 510 heat radiations from air vent (cooling air stream) leaked-in air that is arranged on the casing 10.
Like this, can remove the heat of each optical system (each parts of optical devices 510) of projector 1000 effectively.
When the projector 1000 of the such embodiment 1 that constitutes of explanation, below, for the purpose of simplifying the description, illustrate in greater detail the projector 1000 of embodiment 1 according to the structure of the parts in the light path of the red light in the light path that is configured in 3 each coloured light.
As shown in Figure 2, in the projector 1000 of embodiment 1, between liquid-crystal apparatus 410R and cross dichroic prism 500, be provided with the 1st transparent member 450R and emitting side polaroid 440R, on the face of the light incident side of emitting side polaroid 440R, be bonded with the 1st transparent member 450R, simultaneously, the light-incident end of the face of the light emitting side of emitting side polaroid 440R and cross dichroic prism 500 is bonding.
Therefore, can make the heat that in emitting side polaroid 440R, takes place from emitting side polaroid 440R two towards the 1st transparent member 450 and cross dichroic prism 500 transmission, thereby the temperature that can suppress emitting side polaroid 440R rises.In addition, owing to emitting side polaroid 440R does not contact with outer gas, so the moisture that can suppress outer gas immerses.Therefore, can suppress to rise and the supporting layer of the emitting side polaroid 440R that the immersion of the moisture of outer gas causes expands and is out of shape, thereby the molecular orientation that can suppress supporting layer gets muddled owing to the temperature of emitting side polaroid 440R.Its result, thus the polarization characteristic that can suppress the emitting side polaroid reduces the quality reduction that can suppress by the light beam of emitting side polaroid 440R.
Therefore, the projector 1000 of embodiment 1 exactly can be than more can suppress owing to the rise projector of image quality of the projected image that causes of the temperature of emitting side polaroid in the past.
In addition, in the projector 1000 of embodiment 1, because the bigger cross dichroic prism 500 of emitting side polaroid 440R and ratio of heat capacities is bonding, so the temperature that can suppress emitting side polaroid 440R rises, the heat dispersion of raising projector.In addition, owing to make cross dichroic prism 500 bonding with casing 10 by the liner 12 of heat conductivity, so, can and then increase thermal capacity, thereby can further improve the heat dispersion of projector.
In the projector 1000 of embodiment 1, shown in Fig. 3 (a), only the light emitting side at polarization layer 40 has the supporting layer 42 of supporting polarization layer 40.
Like this, the molecular orientation of the supporting layer of light incident side just can not get muddled.That is, the birefringence that between polarization layer 40 and liquid-crystal apparatus 410R, does not exist the heat distortion of supporting layer to cause, so, arrive polarization layer 40 by the light of liquid-crystal apparatus 410R modulation with maintaining the original state.Therefore, can significantly not reduce by the rise polarization characteristic of the emitting side polaroid that causes of the temperature of emitting side polaroid 440R, thereby the image quality of projected image can significantly not reduce.At this moment, even the polarization characteristic of hypothesis supporting layer 42 of light emitting side because temperature rises reduces perhaps, the reduction of its polarization characteristic does not affect the analyzing of polarization layer 40 yet, so the image quality of projected image can significantly not reduce.
In the projector 1000 of embodiment 1, as mentioned above, the face of the light incident side of the 1st transparent member 450R and emitting side polaroid 440R is bonding, simultaneously, because the face of the light emitting side of emitting side polaroid 440R and the light-incident end of cross dichroic prism 500 are bonding, so, even emitting side polaroid 440R is the structure that only has supporting layer 42 at the light emitting side of polarization layer 40, the also physical strength that can obtain stipulating.
In the projector 1000 of embodiment 1, as shown in Figure 2, between collector lens 300R and liquid-crystal apparatus 410R, be provided with light incident side polaroid 420R and the 2nd transparent member 430R, the face of the light emitting side of the 2nd transparent member 430R and light incident side polaroid 420R is bonding, simultaneously, the face of the light emitting side of the face of the light incident side of light incident side polaroid 420R and collector lens 300R is bonding.
Like this, since can make the heat that in light incident side polaroid 420R, takes place from light incident side polaroid 420R two towards the 2nd transparent member 430R and collector lens 300R transmission, so the temperature that can suppress light incident side polaroid 420R rises.In addition, owing to light incident side polaroid 420R does not contact with outer gas, so, can suppress the immersion of the moisture of outer gas.Therefore, can suppress to rise and the supporting layer of the light incident side polaroid 420R that the immersion of the moisture of outer gas causes expands and is out of shape, thereby the molecular orientation that can suppress supporting layer gets muddled owing to the temperature of light incident side polaroid 420R.Its result, thus the polarization characteristic that can suppress the light incident side polaroid reduces the quality reduction that can suppress by the light beam of light incident side polaroid 420R.
Therefore, the projector 1000 of embodiment 1 is can be than more can suppress owing to the rise projector of image quality of the projected image that causes of the temperature of light incident side polaroid in the past.
In addition, in the projector 1000 of embodiment 1, because the bigger collector lens 300R of light incident side polaroid 420R and ratio of heat capacities is bonding, so, the temperature rising of light incident side polaroid 420R can be suppressed, thereby the heat dispersion of projector can be improved.In addition, because collector lens 300R is connected with casing 10 by the holding member of heat conductivity, so, can and then increase thermal capacity, thereby can further improve the heat dispersion of projector.
In the projector 1000 of embodiment 1, shown in Fig. 3 (b), light incident side polaroid 420R only has the supporting layer 22 of supporting polarization layer 20 at the light incident side of polarization layer 20.
Like this, the molecular orientation of the supporting layer of light emitting side just can not get muddled.Promptly, between polarization layer 20 and liquid-crystal apparatus 410R, just do not exist because the birefringence that the heat distortion of supporting layer causes, so light consistent with the linearly polarized light that has optical axis in the direction of stipulating in polarization layer 20 just arrives liquid-crystal apparatus 410R with its original state transfer.Therefore, the polarization characteristic of light incident side polaroid just can not rise owing to the temperature of light incident side polaroid and significantly reduce, thereby the image quality of projected image can significantly not reduce.At this moment, even suppose because the temperature rising causes the polarization characteristic of the supporting layer 22 of light incident side to reduce a little, also since the reduction of this polarization characteristic compensate by the polarization layer 20 of light incident side polaroid 420R, can not carry out analyzing mistakenly at the polarization layer 40 of emitting side polaroid 440R, so the image quality of projected image can significantly not reduce.
In the projector 1000 of embodiment 1, as mentioned above, because the face of the light emitting side of the 2nd transparent member 430R and light incident side polaroid 420R is bonding, simultaneously, the face of the face of the light incident side of light incident side polaroid 420R and the light emitting side of collector lens 300R is bonding, so, even light incident side polaroid 420R only has supporting layer 22 at the light incident side of polarization layer 20, the also physical strength that can obtain stipulating.
In the projector 1000 of embodiment 1, the 1st transparent member 450R is the light-transmitting substrate that is made of sapphire.
Owing to the heat conductivity of the light-transmitting substrate that is made of sapphire is very excellent, so, can make the heat that in emitting side polaroid 440R, takes place to system's external diffusion effectively, thereby can further suppress because the deterioration of the polarization characteristic that the temperature rising of emitting side polaroid 440R causes.
In the projector 1000 of embodiment 1, the relative emitting side polaroid of the 1st transparent member 450R 440R is configured to the polarization axle almost parallel or the approximate vertical of optic axis and the polarization layer 40 of the 1st transparent member 450R.
As the 1st transparent member 450R, when using the light-transmitting substrate that is made of sapphire, by adopting said structure, the polarized state of light by the 1st transparent member 450R does not change.In addition, big axially consistent with the bearing of trend of emitting side polaroid 440R of the thermal expansion by making the 1st transparent member 450R can suppress the thermal deformation of emitting side polaroid 440R.
In the projector 1000 of embodiment 1, the 2nd transparent member 430R is the light-transmitting substrate that is made of sapphire.
Owing to the heat conductivity of the light-transmitting substrate that is made of sapphire is very excellent, so, can make the heat that in light incident side polaroid 420R, takes place to system's external diffusion effectively, thereby can further suppress because the deterioration of the polarization characteristic that the temperature rising of light incident side polaroid 420R causes.
In the projector 1000 of embodiment 1, the relative light incident side polaroid of the 2nd transparent member 430R 420R is configured to the polarization axle almost parallel or the approximate vertical of optic axis and the polarization layer 20 of the 2nd transparent member 430R.
As the 2nd transparent member 430R, when using the light-transmitting substrate that is made of sapphire, by adopting said structure, the polarized state of light by the 2nd transparent member 430R does not change.In addition, big axially consistent with the bearing of trend of light incident side polaroid 420R of the thermal expansion by making the 2nd transparent member 430R can suppress the thermal deformation of light incident side polaroid 420R.
In the projector 1000 of embodiment 1, between the 1st transparent member 450R and casing 10, further has the heat-conduction component 14 (referring to Fig. 3 (a)) of conduction heat.
Like this, the heat that in emitting side polaroid 440R, takes place just by the 1st transparent member 450R and heat-conduction component 14 to casing 10 diffusions, so, can improve the heat dispersion of projector.
In the projector 1000 of embodiment 1, between the 2nd transparent member 430R and casing 10, further has the heat-conduction component 16 (referring to Fig. 3 (b)) of conduction heat.
Like this, the heat that in light incident side polaroid 420R, takes place also by the 2nd transparent member 430R and heat conductivity parts 16 to casing 10 diffusions, so, can further improve the heat dispersion of projector.
As heat conductivity parts 14,16, can use for example metal such as aluminum or aluminum alloy.
In the projector 1000 of embodiment 1, be provided with the cooling air stream of cooling the 1st transparent member 450R and the 2nd transparent member 430R.
Like this, owing to can utilize the cooling air of cooling air stream to cool off the 1st transparent member 450R and the 2nd transparent member 430R, so, the temperature that can suppress the 1st transparent member 450R and the 2nd transparent member 430R rises, thereby can remove the heat that takes place in emitting side polaroid 440R and light incident side polaroid 420R effectively.
The projector 1000 of embodiment 1 can suppress the deterioration of light incident side polaroid 420R (420G, 420B) and emitting side polaroid 440R (440G, 440B), thereby becomes long-life projector.
The optical devices 510 of embodiment 1 are the parts of structure of the projector 1000 of embodiment 1, the effect that the effect that the optical devices 510 of embodiment 1 are had and the projector 1000 of embodiment 1 are had repeats, so omission is about the explanation of the effect of the optical devices 510 of embodiment 1.
Here, in the optical devices 510 of embodiment 1, emitting side polaroid 440R is the polaroid that only has supporting layer 42 at the light emitting side of polarization layer 40, light incident side polaroid 420R is the polaroid that only has supporting layer 22 at the light incident side of polarization layer 20, but, the present invention is not limited to this, for example also can be following distortion.
Fig. 4 is the figure of optical devices 512 that is used to illustrate the variation of embodiment 1.Fig. 4 (a) is the figure when seeing optical devices 512 from above, and Fig. 4 (b) is the B-B sectional view of Fig. 4 (a).In Fig. 4, be marked with identical symbol for the parts identical, and omit detailed explanation with Fig. 2.
In the optical devices 512 of variation, shown in Fig. 4 (a) and Fig. 4 (b), emitting side polaroid 442R is the polaroid of structure that has the supporting layer that has not only omitted light incident side but also omitted the supporting layer of light emitting side, and light incident side polaroid 422R is the polaroid of structure that has the supporting layer that has not only omitted the light emitting side but also omitted the supporting layer of light incident side.
Be not limited to be configured in light incident side polaroid 422R and emitting side polaroid 442R on the light path of red light, be configured in light incident side polaroid 422G and the emitting side polaroid 442G on the light path of green light and be configured in light incident side polaroid 422B on the light path of blue light and emitting side polaroid 442B too, be polaroid with said structure.
Like this, the optical devices 512 of variation are different with the situation of the optical devices 510 of embodiment 1 as the structure of the polaroid that each light incident side polaroid uses with each emitting side polaroid, but, the same with the situation of the optical devices 510 of embodiment 1, the face of the light incident side of the polarization layer 40 of the 1st transparent member 450R and emitting side polaroid 442R is bonding, the surface of the light emitting side of the polarization layer 40 of emitting side polaroid 442R and the light-incident end of cross dichroic prism 500 are bonding, simultaneously, the light emitting side of the polarization layer 20 of the 2nd transparent member 430R and light incident side polaroid 422R surperficial bonding, the face of the surface of the light incident side of the polarization layer 20 of light incident side polaroid 422R and the light emitting side of collector lens 300R is bonding, so, be can more can suppress than projector in the past because the projector that the image quality of the projected image that the temperature rising of light incident side polaroid and emitting side polaroid causes reduces.
Embodiment 2.
Fig. 5 is the figure that is used to illustrate the optical devices 514 of embodiment 2.Fig. 5 (a) is the figure when seeing optical devices 514 from above, and Fig. 5 (b) is the A-A sectional view of Fig. 5 (a).Fig. 6 is the figure when seeing polarization separation optical element 460R peripheral part from the side.In Fig. 5, be marked with identical symbol for the parts identical, and omit detailed explanation with Fig. 2.
The optical devices 514 of embodiment 2 have basically the structure similar to the optical devices 510 of embodiment 1, and are still, as shown in Figure 5 and Figure 6, different with the optical devices 510 of bonding parts of the light incident side of emitting side polaroid and embodiment 1.
Promptly, in the optical devices 510 of embodiment 1, on the face of the light incident side of emitting side polaroid 440R, 440G and 440B, be bonded with the 1st transparent member 450R, 450G and 450B respectively, in contrast, in the optical devices 514 of embodiment 2, be bonded with on the face of the light incident side of emitting side polaroid 440R, 440G and 440B that the direction that only sees through from the light that liquid- crystal apparatus 410R, 410G and 410B penetrate in regulation has the linearly polarized light of optical axis and polarisation of light separate optical element 460R, the 460G and the 460B that reflect other.
When polarization separation optical element 460R, the 460G of optical devices 514 of explanation embodiment 2 and 460B etc., below for the purpose of simplifying the description, the structure that is configured in the parts in the light path of red light in the light path according to 3 each coloured light is elaborated.
As shown in Figure 6, have will be a plurality of and have the structure that the XY type polarization film 462R of the polarization characteristic of XY type is clipped in the middle the pellicular cascade with two direction of principal axis with 2 glass prism 464R, 466R for polarization separation optical element 460R.The angle of the light entrance face of polarization separation optical element 460R and XY type polarization film 462R is set at for example 30 degree.On the face of the light incident side (liquid crystal device side) of polarization separation optical element 460R, be formed with not shown antireflection layer.
In polarization separation optical element 460R, polarized light by XY type polarized light film 462R reflection in by the polarized light of liquid-crystal apparatus 410R modulation directly penetrates from the side of polarized light separate optical element 460R, perhaps penetrates from the side of polarized light separate optical element 460R after the light entrance face reflection by polarization separation optical element 460R.At this moment, owing to be total reflection on the light entrance face of polarization separation optical element 460R, so, stray light level can be reduced.
Above polarization separation optical element 460R, be provided with the light absorption units 468R that is used to absorb by XY type polarization film 462R reflection the polarized light that penetrates from polarization separation optical element 460R.Like this, light absorption units 468R is used for catching effectively the light that is run off by XY type polarized light film 462R reflection outside system, so, parasitic light can be suppressed to take place in the projector, thereby the image quality of projected image can be further improved.In addition, because light absorption units 468R is configured in the top of polarization separation optical element 460R, so, the heat that in light absorption units 468R, takes place by convection current be lost to optical system above, thereby heat can be reduced to Min. to the influence of optical system.
Like this, the optical devices 514 of embodiment 2 are different in the situation with the optical devices 510 of embodiment 1 aspect the bonding parts of the light incident side of emitting side polaroid, but, the same with the situation of the optical devices 510 of embodiment 1, on the face of the light incident side of emitting side polaroid 440R, be bonded with polarization separation optical element 460R, simultaneously, the face of the light emitting side of emitting side polaroid 440R and the light-incident end of cross dichroic prism 500 are bonding, so, be than more can suppress in the past owing to the temperature of the emitting side polaroid projector that the image quality of the projected image that causes reduces that rises.
In the optical devices 514 of embodiment 2, from the light that liquid-crystal apparatus 410R penetrates, after seeing through polarized light separate optical element 460R, the linearly polarized light that the direction of regulation has an optical axis projects on the screen SC R (not shown) by projection optical system 600 (not shown)s, on the other hand, other light will forbid that promptly the light (not seeing through the polarized component of the polarization layer 40 of emitting side polaroid 440R) of advancing to projection optical system 600 is lost to outside the system by polarization separation optical element 460R reflection.Therefore, the polarization separation optical element 460R that the light that incides in the light on the emitting side polaroid 440R polarized component of the polarization layer 40 that does not see through emitting side polaroid 440R is used as prime almost all removes, so, can suppress the heating among the emitting side polaroid 440R effectively, thereby the temperature that can more effectively suppress emitting side polaroid 440R rises.
In addition, the XY type polarization film 462R of polarization separation optical element 460R is a reflection type polarizer, and relatively lighting optical axis 100ax (not shown) is provided with obliquely, so, as the characteristic of analyzer variation slightly.But, can utilize emitting side polaroid 440R with the image do not removed among the polarization separation optical element 460R the part of unwanted light interdict reliably, so, can access preferable image.
That is, by having shared generation by polarization separation optical element 460R and emitting side polaroid R, thereby can improve the reliability of device as the effect of analyzer and heat.
The optical devices 514 of embodiment 2 are except different with the bonding parts of the light incident side of emitting side polaroid, have the structure identical with the optical devices 510 of embodiment 1, so, have the effect identical with the optical devices 510 of embodiment 1.
Embodiment 3.
Fig. 7 is the figure that is used to illustrate the projector 1006 of embodiment 3.Fig. 7 (a) is the figure when seeing optical devices 516 from above, and Fig. 7 (b) is the A-A sectional view of Fig. 7 (a).In Fig. 7, be marked with identical symbol for the parts identical, and omit detailed explanation with Fig. 2.
The projector 1006 of embodiment 3 is the same with the projector 1000 of embodiment 1, is to have: lighting device 100; The illuminating bundle of lighting device 100 is separated into 3 coloured light of red light, green light and blue light and separates leaded light optical system 200 to the look of illuminated regional leaded light; Optical devices 516; Will be by the projector of the projection optical system 600 of the synthetic optical projection of the cross dichroic prism 500 of optical devices 516 to the projecting plane of screen SC R etc.Lighting device 100, look separation leaded light optical system 200 and projection optical system 600 are the same with explanation in embodiment 1, so, omit its detailed explanation.
Optical devices 516 comprise: 3 liquid-crystal apparatus 410R, the 410G and the 410B that are separated 3 coloured light that leaded light optical system 200 separates according to image information modulation by look; Will be by the synthetic cross dichroic prism 500 of each coloured light of 3 liquid- crystal apparatus 410R, 410G and 410B modulation; Be configured in 3 collector lens 300R, 300G and the 300B of the light incident side of 3 liquid- crystal apparatus 410R, 410G and 410B; Be configured in 3 light incident side polaroid 420R, 420G and the 420B of the light incident side of liquid- crystal apparatus 410R, 410G and 410B; 3 liquid crystal device side transparent member 432R, 432G and the 432B bonding with the face of the light emitting side of 3 light incident side polaroid 420R, 420G and 420B; Be configured in 3 emitting side polaroid 440R, 440G and the 440B of the light emitting side of 3 liquid- crystal apparatus 410R, 410G and 410B; Bonding with the face of the light incident side of 3 emitting side polaroid 440R, 440G and 440B respectively 3 liquid crystal device side transparent member 452R, 452G and 452B.
In the projector 1006 of embodiment 3, the supporting layer 22 of light incident side polaroid 420R is configured in the opposition side (light incident side) of the liquid-crystal apparatus 410R of polarization layer 20, and the supporting layer 42 of emitting side polaroid 440R is configured in the opposition side (light emitting side) of the liquid-crystal apparatus 410R of polarization layer 40.
Therefore, the molecular orientation of the supporting layer of liquid crystal device side can not get muddled.Promptly, there is not the birefringence that causes by the distortion of the heat of supporting layer between polarization layer 20 and the liquid-crystal apparatus 410R and between polarization layer 40 and the liquid-crystal apparatus 410R, so, polarization characteristic as polaroid can not rise owing to the temperature of light incident side polaroid and emitting side polaroid and significantly reduce, thereby the image quality of projected image can significantly not reduce.
At this moment, even reduce a little owing to the temperature rising makes the polarization characteristic of the supporting layer 42 of emitting side polaroid 440R, the polarization layer 40 of emitting side polaroid 440R also analyzing less than the reduction of its polarization characteristic, so the image quality of projected image can significantly not reduce.In addition, even suppose because the polarization characteristic of the supporting layer 22 of temperature rising light incident side polaroid 420R reduces a little, the reduction of this polarization characteristic is also compensated by the polarization layer 20 of light incident side polaroid 420R, the polarization layer 40 of emitting side polaroid 440R can not carry out analyzing mistakenly yet, so the image quality of projected image can significantly not reduce.
In the projector 1006 of embodiment 3, liquid crystal device side transparent member 432R, 432G and 432B are bonding with the face of the liquid crystal device side of light incident side polaroid 420R, 420G and 420B respectively, so, the heat that takes place in light incident side polaroid 420R, 420G and 420B can be transmitted to liquid crystal device side transparent member 432R, 432G and 432B, thereby the temperature that can suppress light incident side polaroid 420R, 420G and 420B rises.
In the projector 1006 of embodiment 3, liquid crystal device side transparent member 452R, 452G and 452B are bonding with the face of the liquid crystal device side of emitting side polaroid 440R, 440G and 440B respectively, so, the heat that takes place in emitting side polaroid 440R, 440G and 440B can be transmitted to liquid crystal device side transparent member 452R, 452G and 452B, thereby the temperature that can suppress emitting side polaroid 440R, 440G and 440B rises.
In the projector 1006 of embodiment 3, liquid crystal device side transparent member 432R, 432G, 432B, 452R, 452G, 452B are the light-transmitting substrates that is made of sapphire.
Owing to the heat conductivity of the light-transmitting substrate that is made of sapphire is very excellent, so, can be effectively with the heat that in light incident side polaroid 420R, 420G and 420B and emitting side polaroid 440R, 440G and 440B, takes place to system's external diffusion, thereby the temperature that can suppress light incident side polaroid 420R, 420G and 420B and emitting side polaroid 440R, 440G and 440B effectively rises.
In the projector 1006 of embodiment 3, liquid crystal device side transparent member 432R, 432G and the relative light incident side polaroid of 432B 420R, 420G and 420B are configured to the polarization axle almost parallel or the approximate vertical of optic axis and the polarization layer 20 of liquid crystal device side transparent member 432R, 432G and 432B.In addition, liquid crystal device side transparent member 452R, 452G and the relative emitting side polaroid of 452B 440R, 440G and 440B are configured to the polarization axle almost parallel or the approximate vertical of optic axis and the polarization layer 40 of liquid crystal device side transparent member 452R, 452G and 452B.
As liquid crystal device side transparent member 432R, 432G, 432B, 452R, 452G, 452B, even when using the light-transmitting substrate that constitutes by sapphire, by adopting said structure, the polarized state of light by liquid crystal device side transparent member 432R, 432G, 432B, 452R, 452G, 452B is not changed.
In addition, big axially consistent with the bearing of trend of light incident side polaroid 420R, 420G and 420B or emitting side polaroid 440R, 440G and 440B of thermal expansion by making liquid crystal device side transparent member 432R, 432G, 432B, 452R, 452G and 452B can suppress the thermal deformation of light incident side polaroid 420R, 420G and 420B or emitting side polaroid 440R, 440G and 440B.
The projector 1006 of embodiment 3 can suppress the deterioration of light incident side polaroid 420R, 420G and 420B or emitting side polaroid 440R, 440G and 440B, so, be long-life projector.
In the projector 1006 of embodiment 3, as liquid crystal device side transparent member 452R, 452G and 452B, used the light-transmitting substrate that constitutes by sapphire, still, the present invention is not limited to this, also can use the polarization separation optical element of explanation in embodiment 2.At this moment, can obtain and the identical effect of polarization separation optical element that in embodiment 2, illustrates.
Embodiment 4.
Fig. 8 is the figure that is used to illustrate the projector 1008 of embodiment 4.Fig. 8 (a) is the figure when seeing optical devices 518 from above, and Fig. 8 (b) is the A-A sectional view of Fig. 8 (a).In Fig. 8, be marked with identical symbol for the parts identical with Fig. 7, omit detailed explanation.
Projector 1008 (not shown)s of embodiment 4 have the structure substantially the same with the projector 1006 of embodiment 3, and still, opposition side transparent member this point is different with the situation of the projector 1006 of embodiment 3 further having.
Promptly, in the projector 1008 of embodiment 4, as shown in Figure 8, opposition side transparent member 470R, 470G and 470B are bonding with the face of the opposition side of the face of the liquid crystal device side of light incident side polaroid 420R, 420G and 420B respectively, and opposition side transparent member 480R, 480G and 480B are bonding with the face (light emergence face) of the opposition side of the face of the liquid crystal device side of emitting side polaroid 440R, 440G and 440B respectively.
Like this, the projector 1008 of embodiment 4 further has the opposition side transparent member, different with the situation of the projector 1006 of embodiment 3, but, different with the situation of the projector 1006 of embodiment 3, the supporting layer 22 of light incident side polaroid 420R is configured in the opposition side (light incident side) of the liquid-crystal apparatus 410R of polarization layer 20, and the supporting layer 42 of emitting side polaroid 440R is configured in the opposition side (light emitting side) of the liquid-crystal apparatus 410R of polarization layer 40.Therefore, the molecular orientation of the supporting layer of liquid crystal device side can not get muddled.Promptly, there is not the birefringence that causes by the distortion of the heat of supporting layer between polarization layer 20 and the liquid-crystal apparatus 410R and between polarization layer 40 and the liquid-crystal apparatus 410R, so, the polarization characteristic of polaroid can not rise owing to the temperature of light incident side polaroid and emitting side polaroid and significantly reduce, thereby the image quality of projected image can significantly not reduce.
In the projector 1008 of embodiment 4, on the light entrance face of light incident side polaroid 420R, 420G and 420B, be bonded with opposition side transparent member 470R, 470G and 470B respectively, so, can make the heat that in light incident side polaroid 420R, 420G and 420B, takes place to opposition side light transparent member 470R, 470G and 470B transmission, thereby the temperature that can suppress light incident side polaroid 420R, 420G and 420B rise.
In addition, because the supporting layer 22 of light incident side polaroid 420R, 420G and 420B is not exposed to the outside, so, can suppress because the temperature of light incident side polaroid 420R, 420G and 420B rises and the immersion of the moisture of outer gas causes that supporting layer 22 expands and is out of shape.Therefore, the molecule that can suppress supporting layer 22 gets muddled, the result, and the image quality that can suppress projected image reduces.
In addition, because light incident side polaroid 420R, 420G and 420B and opposition side transparent member 470R, 470G and 470B are bonding, so, even each light incident side polaroid 420R, 420G and 420B are the polaroid of 2 layers of structure being made of polarization layer 20 and 1 supporting layer 22, the also physical strength that can obtain stipulating.At this moment, owing to be the structure of utilizing liquid crystal device side transparent member 432R, 432G and 432B and opposition side transparent member 470R, 470G and 470B light incident side polaroid 420R, 420G and 420B to be clipped in the middle from the two sides, so, can further improve physical strength.
In the projector 1008 of embodiment 4, opposition side transparent member 480R, 480G and 480B are bonding with the light emergence face of emitting side polaroid 440R, 440G and 440B respectively, so, the heat that takes place in emitting side polaroid 440R, 440G and 440B can be transmitted to opposition side transparent member 480R, 480G and 480B, thereby the temperature that can suppress emitting side polaroid 440R, 440G and 440B rises.
In addition, because the supporting layer 42 of emitting side polaroid 440R, 440G and 440B is not exposed to the outside, so, can suppress because the temperature of light incident side polaroid 440R, 440G and 440B rises and the immersion of the moisture of outer gas causes that supporting layer 42 expands and is out of shape.Therefore, the molecule that can suppress supporting layer 42 gets muddled, the result, and the image quality that can suppress projected image reduces.
In addition, because emitting side polaroid 440R, 440G and 440B and opposition side transparent member 480R, 480G and 480B are bonding, so, even each emitting side polaroid 440R, 440G and 440B are the polaroid of 2 layers of structure being made of polarization layer 40 and 1 supporting layer 42, the also physical strength that can obtain stipulating.At this moment, owing to be the structure of utilizing liquid crystal device side transparent member 452R, 452G and 452B and opposition side transparent member 480R, 480G and 480B emitting side polaroid 440R, 440G and 440B to be clipped in the middle from the two sides, so, can further improve physical strength.
In the projector 1008 of embodiment 4, opposition side transparent member 470R, 470G, 470B, 480R, 480G, 480B are the light-transmitting substrates that is made of sapphire.
Owing to the heat conductivity of the light-transmitting substrate that is made of sapphire is very excellent, so, can be effectively with the heat that in light incident side polaroid 420R, 420G and 420B and emitting side polaroid 440R, 440G and 440B, takes place to system's external diffusion, thereby the temperature that can suppress light incident side polaroid 420R, 420G and 420B and emitting side polaroid 440R, 440G and 440B effectively rises.
In the projector 1008 of embodiment 4, opposition side transparent member 470R, 470G and the relative light incident side polaroid of 470B 420R, 420G and 420B are configured to the polarization axle almost parallel or the approximate vertical of optic axis and the polarization layer 20 of opposition side transparent member 470R, 470G and 470B.In addition, opposition side transparent member 480R, 480G and the relative emitting side polaroid of 480B 440R, 440G and 440B are configured to the polarization axle almost parallel or the approximate vertical of optic axis and the polarization layer 40 of opposition side transparent member 480R, 480G and 480B.
Even as opposition side transparent member 470R, 470G, 470B, 480R, 480G, 480B, during light-transmitting substrate that use is made of sapphire, by adopting said structure, the polarized state of light by opposition side transparent member 470R, 470G, 470B, 480R, 480G, 480B is not changed.
In addition, big axially consistent with the bearing of trend of light incident side polaroid 420R, 420G and 420B or emitting side polaroid 440R, 440G and 440B of thermal expansion by making opposition side transparent member 470R, 470G, 470B, 480R, 480G, 480B can suppress the thermal deformation of light incident side polaroid 420R, 420G and 420B or emitting side polaroid 440R, 440G and 440B.
Because the projector 1008 of embodiment 4 can suppress the deterioration of light incident side polaroid 420R, 420G and 420B and emitting side polaroid 440R, 440G and 440B, so, be long-life projector.
The projector 1008 of embodiment 4 has the structure identical with the projector 1006 of embodiment 3 except further having the opposition side transparent member, so, have the effect identical with the projector 1006 of embodiment 3.
In the projector 1008 of embodiment 4, liquid crystal device side transparent member 432R, 432G and 432B respectively with light incident side polaroid 420R, the light emergence face of 420G and 420B is bonding, opposition side transparent member 470R, 470G and 470B respectively with light incident side polaroid 420R, the light entrance face of 420G and 420B is bonding, liquid crystal device side transparent member 452R, 452G and 452B respectively with emitting side polaroid 440R, the light entrance face of 440G and 440B is bonding, opposition side transparent member 480R, 480G and 480B respectively with emitting side polaroid 440R, the light emergence face of 440G and 440B is bonding, but, the present invention is not limited to this, also can adopt following structure.
For example, in the projector 1008 of embodiment 4, as liquid crystal device side transparent member 452R, 452G and the 452B bonding with the light entrance face of emitting side polaroid 440R, 440G and 440B, used the light-transmitting substrate that constitutes by sapphire, but, also can use the polarization separation optical element of explanation in embodiment 2, replace said structure.At this moment, direction in regulation from the light of liquid-crystal apparatus 410R, 410G and 410B ejaculation has the linearly polarized light of optical axis through after the polarized light separate optical element, project on the screen SC R (not shown) by projection optical system 600 (not shown)s, on the other hand, other light will forbid that promptly the light (not seeing through the polarized component of the polarization layer 40 of emitting side polaroid 440R, 440G and 440B) of advancing to projection optical system 600 is lost to outside the system by the reflection of polarization separation optical element.Therefore, inciding the light that does not see through the polarized component of polarization layer 40 in the light on emitting side polaroid 440R, 440G and the 440B is almost all removed by the polarization separation optical element as prime, so, can suppress the heating of emitting side polaroid 440R, 440G and 440B effectively, thereby the temperature that can suppress emitting side polaroid 440R, 440G and 440B effectively rises.
In addition, in the projector 1008 of embodiment 4, as opposition side transparent member 470R, 470G and the 470B bonding with the light entrance face of light incident side polaroid 420R, 420G and 420B, used the light-transmitting substrate that constitutes by sapphire, but, also can use the polarization separation optical element of explanation in embodiment 2, replace said structure.At this moment, the linearly polarized light that has an optical axis in the direction of regulation from the light that collector lens 300R, 300G and 300B penetrate sees through the polarized light separate optical element and incides on light incident side polaroid 420R, 420G and the 420B, on the other hand, other light will forbid that promptly the light (not seeing through the polarized component of the polarization layer 20 of light incident side polaroid 420R, 420G, 420B) of advancing to light incident side polaroid 420R, 420G and 420B is by the reflection of polarization separation optical element and be lost to outside the system.Therefore, the light of polarized component that does not see through the polarization layer 20 of light incident side polaroid 420R, 420G and 420B from the light that collector lens 300R, 300G and 300B penetrate is almost all removed by the polarization separation optical element as prime, so, can suppress the heating of light incident side polaroid 420R, 420G and 420B effectively, thereby the temperature that can suppress light incident side polaroid 420R, 420G and 420B effectively rises.
As the polarization separation optical element, can use the polarization separation optical element that constitutes by the dielectric multilayer film, arrange the polarization separation optical element of the wire grid type that forms and use the pellicular cascade that will have two direction of principal axis a plurality of and have a polarization separation optical element etc. of XY type polarization film of the polarization characteristic of XY type by a large amount of fine metal fine rules.
In addition, in the projector 1008 of embodiment 4, opposition side transparent member 480R, 480G that the light emergence face of emitting side polaroid 440R, 440G and 440B is bonding and 480B and cross dichroic prism 500 compartment of terrain configuration respectively, but, also can opposition side transparent member 480R, 480G and 480B bonding with a plurality of light-incident ends of cross dichroic prism 500 respectively.At this moment, the heat that takes place in emitting side polaroid 440R, 440G and 440B is transmitted to cross dichroic prism 500 by opposition side transparent member 480R, 480G and 480B, so the temperature that can further suppress emitting side polaroid 440R, 440G and 440B rises.In addition, because the cross dichroic prism 500 that opposition side transparent member 480R, 480G and 480B and ratio of heat capacities are bigger is bonding, so, the temperature that can suppress opposition side transparent member 480R, 480G and 480B and emitting side polaroid 440R, 440G and 440B rises, thereby can improve the heat dispersion of projector.
In addition, in the projector 1008 of embodiment 4, opposition side transparent member 470R, 470G and 470B and collector lens 300R, 300G and the 300B respectively compartment of terrain configuration bonding with the light entrance face of light incident side polaroid 420R, 420G and 420B, but opposition side transparent member 470R, 470G and 470B also can be bonding with the light emergence face of collector lens 300R, 300G and 300B respectively.At this moment, the heat that takes place in light incident side polaroid 420R, 420G and 420B is transmitted to collector lens 300R, 300G and 300B by opposition side transparent member 470R, 470G and 470B, so the temperature that can further suppress light incident side polaroid 420R, 420G and 420B rises.In addition, because collector lens 300R, 300G and 300B that opposition side transparent member 470R, 470G and 470B and ratio of heat capacities are bigger are bonding, so, the temperature that can suppress opposition side transparent member 470R, 470G and 470B and light incident side polaroid 420R, 420G and 420B rises, thereby can improve the heat dispersion of projector.
Embodiment 5.
Fig. 9 is the figure that is used to illustrate the projector 1010 of embodiment 5.Fig. 9 (a) is the figure when seeing optical devices 520 from above, and Fig. 9 (b) is the A-A sectional view of Fig. 9 (a).In Fig. 9, be marked with identical symbol for the parts identical, and omit its detailed explanation with Fig. 2.
Projector 1010 (not shown)s of embodiment 5 have the structure substantially the same with the projector 1008 of embodiment 4, and are still, different with the projector 1008 of embodiment 4 on the supporting layer this point of omitting polaroid.
That is, in the projector 1010 of embodiment 5, as shown in Figure 9, as the light incident side polaroid, used light incident side polaroid 424R, the 424G and the 424B that constitute by polarization layer 20,, used emitting side polaroid 444R, the 444G and the 444B that constitute by polarization layer 40 as the emitting side polaroid.
Therefore, according to the projector 1010 of embodiment 5, because light incident side polaroid 424R, 424G and 424B do not have supporting layer, so, the problem that does not exist the molecular orientation of supporting layer to get muddled.Promptly, between polarization layer 20 and liquid- crystal apparatus 410R, 410G and 410B, there is not the birefringence that causes by the distortion of the heat of supporting layer, so, the polarization characteristic of light incident side polaroid can not rise owing to the temperature of light incident side polaroid 424R, 424G and 424B and significantly reduce, thereby the image quality of projected image can significantly not reduce.
In addition, according to the projector 1010 of embodiment 5, because emitting side polaroid 444R, 444G and 444B do not have supporting layer yet, so, the phenomenon that does not exist the molecular orientation of supporting layer to get muddled.Promptly, between polarization layer 40 and liquid- crystal apparatus 410R, 410G and 410B, there is not the birefringence that causes by the distortion of the heat of supporting layer, so, the polarization characteristic of emitting side polaroid can not rise owing to the temperature of emitting side polaroid 444R, 444G and 444B and significantly reduce, thereby the image quality of projected image can significantly not reduce.
Usually, because the supporting layer that polaroid uses is an organic component, so pyroconductivity is low, temperature rises easily.In addition, by supporting layer easy deterioration under hot and humid condition that organic component constitutes, molecular orientation gets muddled easily.Therefore, have the polaroid of the supporting layer that is made of organic component, its polarization characteristic reduces significantly owing to heat, thereby the image quality of projected image will significantly reduce.
But, according to the projector 1010 of embodiment 5, because light incident side polaroid 424R, 424G and 424B and emitting side polaroid 444R, 444G and 444B do not have supporting layer, so, such situation can not take place.That is, can suppress the reduction of the image quality of projected image.
The projector 1010 of embodiment 5 can suppress the deterioration of light incident side polaroid 424R, 424G and 424B and emitting side polaroid 444R, 444G and 444B, so, be long-life projector.
The projector 1010 of embodiment 5 has the structure identical with the projector 1008 of embodiment 4 except the supporting layer that has omitted polaroid, so, have the effect identical with the projector 1008 of embodiment 4.
In the projector 1010 of embodiment 5, liquid crystal device side transparent member 432R, 432G and 432B respectively with light incident side polaroid 424R, the light emitting side surface of the polarization layer 20 of 424G and 424B is bonding, opposition side transparent member 470R, 470G and 470B respectively with light incident side polaroid 424R, the light incident side surface of the polarization layer 20 of 424G and 424B is bonding, liquid crystal device side transparent member 452R, 452G and 452B respectively with emitting side polaroid 444R, the light incident side surface of the polarization layer 40 of 444G and 444B is bonding, opposition side transparent member 480R, 480G and 480B respectively with emitting side polaroid 444R, the light emitting side surface of the polarization layer 40 of 444G and 444B is bonding, but, the present invention is not limited to this, also can adopt following structure.
For example, in the projector 1010 of embodiment 5, as with bonding liquid crystal device side transparent member 452R, 452G and the 452B in light incident side surface of the polarization layer 40 of emitting side polaroid 444R, 444G and 444B, used the transparent member that constitutes by sapphire, but, also can use the polarization separation optical element of explanation in embodiment 2, replace said structure.
In addition, in the projector 1010 of embodiment 5, as opposition side transparent member 470R, 470G and the 470B bonding with the light entrance face of light incident side polaroid 424R, 424G and 424B, used the light-transmitting substrate that constitutes by sapphire, but, also can use the polarization separation optical element of explanation in embodiment 2, replace said structure.
In addition, in the projector 1010 of embodiment 5, bonding opposition side transparent member 480R, 480G and 480B and the cross dichroic prism 500 of light emergence face of the configuration of difference compartment of terrain and emitting side polaroid 444R, 444G and 444B, but opposition side transparent member 480R, 480G and 480B also can be bonding with a plurality of light-incident ends of cross dichroic prism 500 respectively.
In addition, in the projector 1010 of embodiment 5, bonding opposition side transparent member 470R, 470G and 470B and collector lens 300R, 300G and the 300B of light entrance face of the configuration of difference compartment of terrain and light incident side polaroid 424R, 424G and 424B, but opposition side transparent member 470R, 470G and 470B are also can be respectively bonding with collector lens 300R, 300G, 300B.
More than, according to the respective embodiments described above projector of the present invention has been described, still, the invention is not restricted to the respective embodiments described above, in the scope that does not break away from purport of the present invention, can implement various forms, for example, can be following distortion.
(1), still, the invention is not restricted to this although understand the example that optical devices of the present invention is applied to projector.Also optical devices of the present invention can be applied to use other optical instrument of polarized light.
(2) in above-mentioned embodiment 1 and 2, illustrated and had the projector 1000 that emitting side polaroid 440R, 440G and 440B is clipped in the structure between the 1st transparent member 450R, 450G and 450B and the cross dichroic prism 500 or light incident side polaroid 420R, 420G and 420B is clipped in the structure between the 2nd transparent member 430R, 430G and 430B and collector lens 300R, 300G and the 300B, but, the present invention is not limited to this, has the projector that polaroid is clipped in the structure between transparent member and other optical elements and is also contained in the scope of the present invention.
(3) above-mentioned embodiment 1 and 2 projector 1000, the material as the 1st transparent member 450R, 450G and 450B and the 2nd transparent member 430R, 430G and 430B has all used sapphire, and still, the present invention is not limited to this.Material as the 1st transparent member 450R, 450G and 450B and the 2nd transparent member 430R, 430G and 430B except sapphire, also can use the sintered body of crystal, quartz glass, hard glass, sintered glass ceramics or cube crystalline substance.As the material of the 1st transparent member or the 2nd transparent member, use when quartzy identical effect in the time of can obtaining with sapphire.In addition, material as the 1st transparent member or the 2nd transparent member, when using the sintered body of quartz glass, hard glass, sintered glass ceramics or cube crystalline substance, because the birefringence of these materials is little, so, can suppress quality reduction by the light beam of the 1st transparent member and the 2nd transparent member.In addition, because these material coefficient of thermal expansion rates are smaller, so, bonding by having with the 1st transparent member or the 2nd transparent member that constitute by the little material of such coefficient of thermal expansion based on the polaroid of the big character of the stretching, extension/distortion of heat, can suppress the distortion of polaroid itself.In addition, as the material of the 1st transparent member and the 2nd transparent member, also can use other clear glass (for example blank glass, borosilicate glass etc. (registered trademark) etc.), the many crystallizations of YAG, aluminium oxide etc.That is, as long as the 1st transparent member 450R, 450G and 450B and the 2nd transparent member 430R, 430G and 430B are inorganic material.As the sintered body of cube crystalline substance, can adopt for example light transmission sintered glass of YAG.
The liquid crystal device side transparent member 432R of the projector 1006～1010 of above-mentioned embodiment 3～5,432G, 432B, 452R, 452G, 452B or opposition side transparent member 470R, 470G, 470B, 480R, 480G, 480B equally also can suitably select from above-mentioned inorganic material.
(4) in the projector 1008,1010 of above-mentioned embodiment 4 and 5, the optic axis that liquid crystal device side transparent member 432R, 432G and 432B and opposition side transparent member 470R, 470G and 470B are configured to make liquid crystal device side transparent member 432R, 432G and 432B and opposition side transparent member 470R, 470G and 470B all with polarization layer 20 polarization axle almost parallel or approximate vertical, but the present invention is not limited to this.In addition, in the projector 1008,1010 of above-mentioned embodiment 4 and 5, the optic axis that liquid crystal device side transparent member 452R, 452G and 452B and opposition side transparent member 480R, 480G and 480B are configured to make liquid crystal device side transparent member 452R, 452G and 452B and opposition side transparent member 480R, 480G and 480B all with the polarization axle almost parallel or the approximate vertical of polarization layer 40, but the present invention is not limited to this.Also can be configured to make the optic axis of liquid crystal device side transparent member 432R, 432G and 432B more parallel or more vertical with opposition side transparent member 470R, 470G and 470B liquid crystal device side transparent member 432R, 432G and 432B than the polarization axle of opposition side transparent member 470R, 470G and the relative polarization layer 20 of 470B.In addition, also liquid crystal device side transparent member 452R, 452G and 452B and opposition side transparent member 480R, 480G and 480B can be configured to make liquid crystal device side transparent member 452R, 452G and 452B more parallel or more vertical than the polarization axle of opposition side transparent member 480R, 480G and the relative polarization layer 40 of 480B.
This is because departing from the influence of the contrast of image of the optic axis of the departure ratio opposition side transparent member 470R of the optic axis of liquid crystal device side transparent member 432R, 432G, 432B, 452R, 452G, 452B, 470G, 470B, 480R, 480G, 480B is big.On the other hand, big the departing from of the optic axis of opposition side transparent member 470R, 470G and 470B is the reason that upsets the ejaculation light of polarization conversion device, in addition, big the departing from of the optic axis of opposition side transparent member 480R, 480G and 480B is the reason of the transmitance reduction of synthetic prisms.
For example, for about 500: 1 projector of contrast, in order to be suppressed to about 1 one-tenth to the influence of the contrast of projector, the bias of the parallel axle of the optic axis that can make liquid crystal device side transparent member 432R, 432G and 432B and the polarization axle of polarization layer 20 or vertical axle is limited in 0.5 degree, the bias that makes the optic axis of liquid crystal device side transparent member 452R, 452G and 452B axle parallel or vertical axle with the polarization axle of polarization layer 40 0.5 spend in.In addition, for example, in order to suppress the influence of the light utilization ratio of projector is 1～2%, the bias of the axle that the optic axis that can make opposition side transparent member 470R, 470G and 470B is parallel or vertical with the polarization axle of polarization layer 20 in 5 degree, the bias of the axle that the optic axis of opposition side transparent member 480R, 480G and 480B is parallel or vertical with the polarization axle of polarization layer 40 be limited in 5 spend in.
Therefore, the bias that can make the optic axis of liquid crystal device side transparent member 432R, 432G and 432B axle parallel or vertical axle with the polarization axle of polarization layer 20 less than the polarization axle of the optic axis of opposition side transparent member 470R, 470G and 470B and polarization layer 20 parallel or vertical spool bias.In addition, equally, the bias of the parallel axle of the optic axis that can make liquid crystal device side transparent member 452R, 452G and 452B and the polarization axle of polarization layer 40 or vertical axle less than the polarization axle of the optic axis of opposition side transparent member 480R, 480G and 480B and polarization layer 40 parallel or vertical spool bias.
(5) in the projector 1008,1010 of above-mentioned embodiment 4 and 5, as liquid crystal device side transparent member 432R, 432G, 432B, 452R, 452G, 452B and opposition side transparent member 470R, 470G, 470B, 480R, 480G, 480B, all used the light-transmitting substrate that constitutes by sapphire, but the present invention is not limited to this.For example, the transparent member of a side in liquid crystal device side transparent member and the opposition side transparent member can be the light-transmitting substrate that the sintered body by quartz glass, hard glass, sintered glass ceramics or cube crystalline substance constitutes, and the opposing party's transparent member is by sapphire or the quartzy light-transmitting substrate that constitutes.
When the temperature of polaroid periphery is higher than assigned temperature, consider from the viewpoint of the load of the heat that alleviates polaroid, liquid crystal device side transparent member 432R, 432G, 432B, 452R, 452G, 452B are preferably by sapphire or the quartzy light-transmitting substrate that constitutes, consider the light-transmitting substrate that opposition side transparent member 470R, 470G, 470B, 480R, 480G, 480B preferably are made of the sintered body of quartz glass, hard glass, sintered glass ceramics or cube crystalline substance from the viewpoint that the quality of the light beam that suppresses to incide the light beam on the polaroid or penetrate from polaroid reduces.
When the temperature of polaroid periphery is lower than assigned temperature, consider from the viewpoint that the quality of the light beam that suppresses to incide the light beam on the polaroid or penetrate from polaroid reduces, the light-transmitting substrate that liquid crystal device side transparent member 432R, 432G, 432B, 452R, 452G, 452B preferably are made of the sintered body of quartz glass, hard glass, sintered glass ceramics or cube crystalline substance, consider that from the viewpoint of the load of the heat that alleviates polaroid opposition side transparent member 470R, 470G, 470B, 480R, 480G, 480B are preferably by sapphire or the quartzy light-transmitting substrate that constitutes.
As the sintered body of cube crystalline substance, can adopt for example light transmission sintered glass of YAG.
(6) in the optical devices 514 of above-mentioned embodiment 2, as the polarization separation optical element, illustrated to use and had a pellicular cascade of two direction of principal axis and have polarization separation optical element 460R, 460G and the 460B of XY type polarization film of the polarization characteristic of XY type a plurality of, but the present invention is not limited to this.As the polarization separation optical element, can use the polarization separation optical element that for example constitutes, a large amount of fine metal fine rules to arrange the polarization separation optical element etc. of the wire grid type that forms by the dielectric multilayer film.
(7) in above-mentioned embodiment 1, illustrated that light incident side polaroid 420R, 420G and 420B with the light incident side that is configured in liquid- crystal apparatus 410R, 410G and 410B are clipped between the 2nd transparent member 430R, 430G and 430B and collector lens 300R, 300G and the 300B respectively, and be configured in emitting side polaroid 440R, the 440G of light emitting side of liquid- crystal apparatus 410R, 410G and 410B and the optical devices 510 that 440B is sandwiched in the structure between the 1st transparent member 450R, 450G and 450B and the cross dichroic prism 500, but the present invention is not limited to this.At least 1 the light incident side polaroid that has among light incident side polaroid 420R, 420G and the 420B is clipped between the 2nd transparent member 430R, 430G and 430B and collector lens 300R, 300G and the 300B, is also contained in the scope of the present invention and at least 1 emitting side polaroid among emitting side polaroid 440R, 440G and the 440B is clipped in the optical devices of the structure between the 1st transparent member 450R, 450G and 450B and the cross dichroic prism 500.
(8) in above-mentioned embodiment 2, the optical devices 514 that emitting side polaroid 440R, 440G with the light emitting side that is configured in liquid- crystal apparatus 410R, 410G, 410B and 440B are sandwiched in the structure between polarization optical element 460R, 460G and 460B and the cross dichroic prism 500 have been described, but the present invention is not limited to this.Having the optical devices that at least 1 emitting side polaroid among emitting side polaroid 440R, 440G and the 440B is clipped in the structure between polarization optical element 460R, 460G and 460B and the cross dichroic prism 500 is also contained in the scope of the present invention.
(9) in above-mentioned embodiment 3, illustrated that light incident side polaroid 420R, 420G and 420B with the light incident side that is configured in liquid- crystal apparatus 410R, 410G and 410B are bonding with liquid crystal device side transparent member 432R, 432G and 432B, and be configured in emitting side polaroid 440R, the 440G of light emitting side of liquid- crystal apparatus 410R, 410G and 410B and 440B all with the optical devices 518 of the bonding structure of liquid crystal device side transparent member 452R, 452G and 452B, but the present invention is not limited to this.At least 1 light incident side polaroid among light incident side polaroid 420R, 420G and the 420B and liquid crystal device side transparent member 432R, 432G and 432B are bonding, and the optical devices of the bonding structure of at least 1 emitting side polaroid among emitting side polaroid 440R, 440G and the 440B and liquid crystal device side transparent member 452R, 452G and 452B are also contained in the pump scope.
(10) in above-mentioned embodiment 4, illustrated and had the liquid-crystal apparatus of being configured in 410R, the light incident side polaroid 420R of the light incident side of 410G and 410B, 420G and 420B are sandwiched in liquid crystal device side transparent member 432R, 432G and 432B and opposition side transparent member 470R, between 470G and the 470B, and be configured in liquid-crystal apparatus 410R, the emitting side polaroid 440R of the light emitting side of 410G and 410B, 440G and 440B are sandwiched in liquid crystal device side transparent member 452R, 452G and 452B and opposition side transparent member 480R, the optical devices 518 of the structure between 480G and the 480B, but the present invention is not limited to this.At least 1 the light incident side polaroid that has among light incident side polaroid 420R, 420G and the 420B is clipped between liquid crystal device side transparent member 432R, 432G and 432B and opposition side transparent member 470R, 470G and the 470B, is also contained in the scope of the present invention and at least 1 emitting side polaroid among emitting side polaroid 440R, 440G and the 440B is clipped in the optical devices of the structure between liquid crystal device side transparent member 452R, 452G and 452B and opposition side transparent member 480R, 480G and the 480B.
(11) in above-mentioned embodiment 5, illustrated and had the liquid-crystal apparatus of being configured in 410R, the light incident side polaroid 424R of the light incident side of 410G and 410B, 424G and 424B are sandwiched in liquid crystal device side transparent member 432R, 432G and 432B and opposition side transparent member 470R, between 470G and the 470B, and be configured in liquid-crystal apparatus 410R, the emitting side polaroid 440R of the light emitting side of 410G and 410B, 440G and 440B are sandwiched in liquid crystal device side transparent member 452R, 452G and 452B and opposition side transparent member 480R, the optical devices 520 of the structure between 480G and the 480B, but the present invention is not limited to this.At least 1 the light incident side polaroid that has among light incident side polaroid 424R, 424G and the 424B is clipped between liquid crystal device side transparent member 432R, 432G and 432B and opposition side transparent member 470R, 470G and the 470B, is also contained in the scope of the present invention and at least 1 emitting side polaroid among emitting side polaroid 440R, 440G and the 440B is clipped in the optical devices of the structure between liquid crystal device side transparent member 452R, 452G and 452B and opposition side transparent member 480R, 480G and the 480B.
(12) in the variation of above-mentioned embodiment 1, to have the supporting layer that has not only omitted light incident side but also omit polaroid (polarization layer 20) and the 1st transparent member of structure of supporting layer of light emitting side and cross dichroic prism when bonding, at first, by bonding agent that any one party in polarization layer 20 and the 1st transparent member and the cross dichroic prism is bonding, heat-treat then and bonding with the opposing party.In addition, polarization layer 20 and the 2nd transparent member and collector lens is when bonding, at first bonding with any one party in polarization layer and the 2nd transparent member and the collector lens by bonding agent, heat-treat then and bonding with the opposing party.At this moment, thermal treatment can be placed 0.5～10 hour in the environment of 80 degree～110 degree Celsius.Like this, because the heat of polarization layer 20 has been carried out initial contraction, so, be subjected to rayed in the projector 1000 and added heat even be assembled into, also can prevent the damage of the polarization layer 20 that thermal stress causes.
(13) in above-mentioned embodiment 5, with the polarization layer 20 that do not have a supporting layer and liquid crystal device side transparent member and opposition side transparent member when bonding, at first, by bonding agent that polarization layer 20 is bonding with any one party in liquid crystal device side transparent member and the opposition side transparent member, heat-treat then and bonding with the opposing party.At this moment, thermal treatment has been because the heat of polarization layer 20 has been carried out initial contraction, so, be subjected to rayed in the projector 1010 and added heat even be assembled into, also can prevent the damage of the polarization layer 20 that thermal stress causes.
(14) in the projector 1000 of above-mentioned embodiment 1, as light supply apparatus, used and had: ellipsoidal reflector 114, have the luminotron 112 of luminescent center and the light supply apparatus 110 of concavees lens 118 near the 1st focus of ellipsoidal reflector 114, still, the present invention is not limited to this.Also can use near the light supply apparatus that has paraboloid and the focus of paraboloid, have the luminotron of luminescent center.
(15) in the projector 1000 of above-mentioned embodiment 1, the structure that disposes in luminotron 112 as the auxiliary mirror 116 of reflector element has been described, still, the present invention is not limited to this.Even not being set, auxiliary mirror can not use the present invention in luminotron yet.
(16) in the projector 1000 of above-mentioned embodiment 1, as the optical system of light uniformization, used the lens integrator optical system that constitutes by lens arra, still, the present invention is not limited to this, also can use the excellent integrator optical system that is made of pole member.
(17) in the respective embodiments described above, the projector that uses 3 liquid- crystal apparatus 410R, 410G and 410B has been described, still, the present invention is not limited to this.Use 1, the projector of the liquid-crystal apparatus more than 2 or 4 or 4 also can use the present invention.
(18) the present invention can be applied to from the front projection type projector of a lateral projection of observing projected image, also can be applied to from the rear projection projector of the opposition side projection of observing projected image.

Claims (20)

1. optical devices is characterized in that possessing:
Modulate a plurality of liquid-crystal apparatus of a plurality of coloured light respectively according to image information;
Will be by the synthetic cross dichroic prism of each coloured light of above-mentioned a plurality of liquid-crystal apparatus modulation;
Be configured in the light incident side separately of above-mentioned a plurality of liquid-crystal apparatus, have a plurality of light incident side polaroids of polarization layer at least;
Be configured in the light emitting side separately of above-mentioned a plurality of liquid-crystal apparatus, have a plurality of emitting side polaroids of polarization layer at least; And
Be adhered to the 1st transparent member of the face of the light incident side of at least 1 emitting side polaroid in above-mentioned a plurality of emitting side polaroid respectively;
Wherein, above-mentioned cross dichroic prism has a plurality of light-incident ends and the light ejaculation end face that penetrate synthetic coloured light of difference incident by the coloured light of above-mentioned a plurality of liquid-crystal apparatus modulation,
The face of the light emitting side of above-mentioned at least 1 emitting side polaroid and the light-incident end of above-mentioned cross dichroic prism are bonding.
2. by the described optical devices of claim 1, it is characterized in that: above-mentioned a plurality of emitting side polaroids only have the supporting layer of supporting above-mentioned polarization layer at the light emitting side of above-mentioned polarization layer.
3. by claim 1 or 2 described optical devices, it is characterized in that: above-mentioned a plurality of light incident side polaroids only have the supporting layer of supporting above-mentioned polarization layer at the light incident side of above-mentioned polarization layer.
4. by any described optical devices of claim 1～3, it is characterized in that: above-mentioned the 1st transparent member is by sapphire or the quartzy light-transmitting substrate that constitutes.
5. by the described optical devices of claim 4, it is characterized in that: so that by optic axis and the polarization axle almost parallel of above-mentioned polarization layer or the mode of approximate vertical of above-mentioned sapphire or the quartzy light-transmitting substrate that constitutes, the light-transmitting substrate that above-mentioned relatively emitting side polaroid configuration is made of above-mentioned sapphire or crystal.
6. by any described optical devices of claim 1～3, it is characterized in that: above-mentioned the 1st transparent member is the light-transmitting substrate that the sintered body by quartz glass, hard glass, sintered glass ceramics or cube crystalline substance constitutes.
7. projector is characterized in that having:
Modulate a plurality of liquid-crystal apparatus of a plurality of coloured light respectively according to image information;
Will be by the synthetic cross dichroic prism of each coloured light of above-mentioned a plurality of liquid-crystal apparatus modulation;
Projection is by the projection optical system of the synthetic light of above-mentioned cross dichroic prism;
Be configured in the light incident side separately of above-mentioned a plurality of liquid-crystal apparatus, have a plurality of light incident side polaroids of polarization layer at least;
Be configured in the light emitting side separately of above-mentioned a plurality of liquid-crystal apparatus, have a plurality of emitting side polaroids of polarization layer at least; And
Be adhered to the 1st transparent member of the face of the light incident side of at least 1 emitting side polaroid in above-mentioned a plurality of emitting side polaroid respectively;
Wherein, above-mentioned cross dichroic prism has a plurality of light-incident ends and the light ejaculation end face that penetrate synthetic coloured light of difference incident by the coloured light of above-mentioned a plurality of liquid-crystal apparatus modulation,
The face of the light emitting side of above-mentioned at least 1 emitting side polaroid and the light-incident end of above-mentioned cross dichroic prism are bonding.
8. by the described projector of claim 7, it is characterized in that: above-mentioned a plurality of emitting side polaroids only have the supporting layer of supporting above-mentioned polarization layer at the light emitting side of above-mentioned polarization layer.
9. by claim 7 or 8 described projector, it is characterized in that: above-mentioned a plurality of light incident side polaroids only have the supporting layer of supporting above-mentioned polarization layer at the light incident side of above-mentioned polarization layer.
10. by any described projector of claim 7～9, it is characterized in that further having:
Be configured in a plurality of collector lenses of the light incident side separately of above-mentioned a plurality of liquid-crystal apparatus; With
Be adhered to a plurality of the 2nd transparent members of face of the light emitting side of above-mentioned a plurality of light incident side polaroids;
Wherein, the face of the light incident side of above-mentioned a plurality of light incident side polaroids is bonding with the face of the light emitting side of above-mentioned a plurality of collector lenses respectively.
11. by the described projector of claim 10, it is characterized in that: above-mentioned the 2nd transparent member is by sapphire or the quartzy light-transmitting substrate that constitutes.
12. by the described projector of claim 11, it is characterized in that: so that by optic axis and the polarization axle almost parallel of above-mentioned polarization layer or the mode of approximate vertical of above-mentioned sapphire or the quartzy light-transmitting substrate that constitutes, the light-transmitting substrate that above-mentioned relatively light incident side polaroid configuration is made of above-mentioned sapphire or crystal.
13. by the described projector of claim 10, it is characterized in that: above-mentioned the 2nd transparent member is the light-transmitting substrate that the sintered body by quartz glass, hard glass, sintered glass ceramics or cube crystalline substance constitutes.
14. any described projector by claim 7～13 is characterized in that: above-mentioned the 1st transparent member is by sapphire or the quartzy light-transmitting substrate that constitutes.
15. by the described projector of claim 14, it is characterized in that: so that by optic axis and the polarization axle almost parallel of above-mentioned polarization layer or the mode of approximate vertical of above-mentioned sapphire or the quartzy light-transmitting substrate that constitutes, the light-transmitting substrate that above-mentioned relatively emitting side polaroid configuration is made of above-mentioned sapphire or crystal.
16. by any described projector of claim 7～13, it is characterized in that: above-mentioned the 1st transparent member is the light-transmitting substrate that the sintered body by quartz glass, hard glass, sintered glass ceramics or cube crystalline substance constitutes.
17. any described projector by claim 7～13 is characterized in that further having:
Each optical system is received into inner casing; With
The heat-conduction component of transmission heat between in above-mentioned the 1st transparent member at least 1 and the above-mentioned casing.
18. any described projector by claim 10～17 is characterized in that further having:
Each optical system is received into inner casing; And
The heat-conduction component of transmission heat between in above-mentioned the 2nd transparent member at least 1 and the above-mentioned casing.
19. any described projector by claim 7～18 is characterized in that: above-mentioned the 1st transparent member is only to see through from the light that above-mentioned liquid-crystal apparatus penetrates to have the linearly polarized light of optical axis and reflect other polarisation of light separate optical elements in the direction of stipulating.
20. any described projector by claim 7～19 is characterized in that: the cooling air stream that is provided with above-mentioned the 1st transparent member of cooling.
CN 200610100555 2005-07-01 2006-07-03 Optical device and projector Pending CN1892413A (en)

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
JP193440/2005 2005-07-01
JP2005193440 2005-07-01
JP047872/2006 2006-02-24
JP047873/2006 2006-02-24
JP047871/2006 2006-02-24
JP121652/2006 2006-04-26
JP121651/2006 2006-04-26
JP121650/2006 2006-04-26
JP172246/2006 2006-06-22
JP172244/2006 2006-06-22
JP172245/2006 2006-06-22

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CNB200610100553XA Active CN100555065C (en) 2005-07-01 2006-07-03 Projector
CN 200610100550 Pending CN1892411A (en) 2005-07-01 2006-07-03 Projector
CN 200610100555 Pending CN1892413A (en) 2005-07-01 2006-07-03 Optical device and projector

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103676289A (en) * 2012-08-31 2014-03-26 松下电器产业株式会社 Liquid crystal display
CN107209442A (en) * 2015-02-05 2017-09-26 索尼公司 Projecting apparatus and optical unit
CN111624802A (en) * 2019-02-28 2020-09-04 精工爱普生株式会社 Light modulation device, optical module, and projector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4816799B2 (en) * 2009-04-03 2011-11-16 セイコーエプソン株式会社 projector
KR102377888B1 (en) * 2016-07-29 2022-03-23 소니그룹주식회사 Synthetic optics unit and projector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103676289A (en) * 2012-08-31 2014-03-26 松下电器产业株式会社 Liquid crystal display
CN103676289B (en) * 2012-08-31 2017-09-29 松下电器产业株式会社 Liquid crystal display device
CN107209442A (en) * 2015-02-05 2017-09-26 索尼公司 Projecting apparatus and optical unit
CN111624802A (en) * 2019-02-28 2020-09-04 精工爱普生株式会社 Light modulation device, optical module, and projector
CN111624802B (en) * 2019-02-28 2023-06-02 精工爱普生株式会社 Light modulation device, optical module, and projector

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CN1892411A (en) 2007-01-10
CN100555065C (en) 2009-10-28

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