JP2017044836A - Organic polarization element and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic polarization element capable of suppressing deterioration caused by heat, and a projector.SOLUTION: An organic polarization element (emission side polarization element 6) of the present invention includes: light-transmitting first substrate 61 and second substrate 62; an organic polarization layer 63 sandwiched between the first substrate 61 and the second substrate 62; and a third substrate 64 coming into contact in a heat conductive manner with a surface, of at least one substrate to be contacted of the first substrate 61 and the second substrate 62, on a side opposite to a side of the organic polarization layer 63. The third substrate 64 has heat conductivity higher than heat conductivity of the substrate to be contacted.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an organic polarizing element and a projector.

Conventionally, an illumination device, a light modulation device that modulates light emitted from the illumination device to form an image according to image information, and a projection optical device that enlarges and projects the image on a projection surface such as a screen Are known.
As such a projector, a projector including three liquid crystal light valves is known (see, for example, Patent Document 1).

  Each of the three liquid crystal light valves in the projector described in Patent Document 1 includes an incident-side polarizing plate, a liquid crystal panel unit, and an output-side polarizing plate. Among these, since the temperature of the output side polarizing plate rises when light modulated by the liquid crystal panel is incident, the output side polarizing plate is made of an inorganic material in order to suppress deterioration due to the temperature increase. In many cases, a configured inorganic polarizing plate (inorganic polarizing element) is employed.

JP 2002-90877 A

By the way, the inorganic polarizing element is often inferior in polarization separation characteristics as compared with an organic polarizing plate (organic polarizing element) composed of an organic material, and the organic polarizing element is used to increase the contrast of a projected image. It is preferable.
However, since the organic polarizing element is easily deteriorated by heat as compared with the inorganic polarizing element, the image projected through the deteriorated organic polarizing element has problems such as color unevenness and a decrease in luminance. . For this reason, the organic polarizing element (organic polarizing plate) which can suppress deterioration by a heat | fever was desired.

  SUMMARY An advantage of some aspects of the invention is that it provides an organic polarizing element and a projector that can suppress deterioration due to heat.

  The organic polarizing element according to the first aspect of the present invention includes a first substrate and a second substrate having translucency, an organic polarizing layer sandwiched between the first substrate and the second substrate, the first substrate, and the second substrate. A third substrate in contact with the surface of the second substrate opposite to the organic polarizing layer side of at least one of the contacted substrates so as to be able to conduct heat; and the thermal conductivity of the third substrate is It is characterized by being higher than the thermal conductivity of the contacted substrate.

  According to the first aspect, when the temperature of the organic polarizing layer increases, the heat of the organic polarizing layer is conducted to the first substrate and the second substrate. In addition, the third substrate is in contact with at least one of the first substrate and the second substrate so as to be able to conduct heat, and the thermal conductivity of the third substrate is either the first substrate or the second substrate. Therefore, the heat conducted to the contacted substrate is conducted to the third substrate and radiated. Thus, since the heat | fever of an organic polarizing layer is thermally radiated from a 3rd board | substrate, degradation by the heat | fever of an organic polarizing layer can be suppressed. Therefore, deterioration of the organic polarizing element can be suppressed.

In the first aspect, the third substrate is in contact with the first substrate out of the first substrate and the second substrate, and a total value of thickness dimensions of the first substrate and the third substrate is It is preferable that the thickness is equal to or less than the thickness dimension of the second substrate.
Here, when the total value of the thickness dimension of the first substrate and the third substrate exceeds the thickness dimension of the second substrate, for example, than a polarizing element having a structure in which the organic polarizing layer is sandwiched between a pair of substrates. Since the thickness dimension of the organic polarizing element becomes large, it is difficult to use the organic polarizing element instead of the polarizing element. For example, when the organic polarizing element is employed in a projector or the like, since the thickness dimension of the organic polarizing element is different, it is necessary to design the lens position of the projection optical device of the projector again, which is complicated.
On the other hand, according to the said 1st aspect, the sum total value of the thickness dimension of a 1st board | substrate and a 3rd board | substrate is below the thickness dimension of a 2nd board | substrate. For this reason, the said organic polarizing element can be arrange | positioned in the space where the polarizing element used conventionally was arrange | positioned. According to this, since the organic polarizing element can be used for an electronic apparatus such as a conventional projector without designing the lens position, the manufacturing cost of the electronic apparatus using the organic polarizing element can be reduced.

In the first aspect, the first substrate is fixed via the organic polarizing layer and the adhesive layer, and the second substrate is bonded to the Si skeleton having an Si structure having an atomic structure including a siloxane bond. It is preferable that it is bonded to the organic polarizing layer by bonding including a group.
Note that examples of the bonding including the Si skeleton having an atomic structure including the siloxane bond and the leaving group bonded to the Si skeleton include bonding with an inorganic substance.
According to the first aspect, each of the first substrate and the second substrate is fixed to the organic polarizing layer via the inorganic substance and the adhesive layer, so that the heat of the organic polarizing layer is transferred to the first substrate and the second substrate. Each can be reliably conducted. In particular, since the first substrate and the organic polarizing layer are fixed via the adhesive layer, the heat of the organic polarizing layer is conducted to the first substrate via the adhesive layer. Accordingly, since the heat of the organic polarizing layer is reliably conducted to the third substrate through the first substrate, the heat of the organic polarizing layer can be reliably radiated from the third substrate.

In the first aspect, it is preferable to have a holding member that holds and integrates the first substrate, the second substrate, and the third substrate.
Here, when the temperature of the organic polarizing layer is increased by the incident light, the first substrate and the second substrate fixed with the organic polarizing layer interposed therebetween are slightly enlarged due to thermal expansion. In this case, if the third substrate is fixed to the first substrate via an adhesive layer or the like, the thermal expansion coefficient of the first substrate is different from the thermal expansion coefficient of the third substrate. May peel off, and the heat of the organic polarizing layer may not be reliably conducted to the third substrate.
On the other hand, in the first aspect, since the holding member holds and integrates the first substrate, the second substrate, and the third substrate, the temperature of the organic polarizing layer rises so that the first substrate becomes the heat substrate. Even if it expand | swells by this, since the said possibility can be suppressed, the said heat can be reliably conducted to a 3rd board | substrate. Therefore, the heat of the organic polarizing layer can be reliably radiated from the third substrate, so that the deterioration of the organic polarizing element can be reliably suppressed.

In the first aspect, the third substrate is preferably a sapphire substrate.
According to the first aspect, since the third substrate is formed of a sapphire substrate, for example, the thermal conductivity of the third substrate is increased as compared with the case where the third substrate is formed of crystal or the like. Can do. Thereby, since the heat of the organic polarizing layer can be reliably radiated from the third substrate, the organic polarizing layer can be cooled more reliably. Therefore, deterioration of the organic polarizing element can be suppressed more reliably.

A projector according to a second aspect of the present invention includes a light source, a light modulation device that modulates light emitted from the light source, a projection optical device that projects light modulated by the light modulation device, and the organic polarizing element. And.
According to the second aspect, since an organic polarizing element having superior polarization separation characteristics compared to an inorganic polarizing element can be used in a projector, light incident on the organic polarizing element can be reliably polarized and separated by the organic polarizing element. The brightness and contrast of the image projected through the organic polarizing element and the light modulation element can be improved.

In the second aspect, it is preferable that the light modulation device is a liquid crystal panel, and the organic polarizing element is disposed on a light emission side of the liquid crystal panel.
In the said 2nd aspect, since the light radiate | emitted from the liquid crystal panel injects into the said organic polarizing element, the light light-modulated by the liquid crystal panel with the said organic polarizing element can be polarization-separated reliably. Therefore, the brightness and contrast of the projected image can be reliably improved.

In the second aspect, a color synthesizing device that synthesizes the plurality of color lights incident from the plurality of light modulation devices provided according to each of the plurality of color lights emitted from the light source, and a cooling gas are circulated. A cooling device, and the cooling gas preferably flows between the color composition device and the third substrate.
According to the said 2nd aspect, since the cooling gas from a cooling device distribute | circulates between a color synthesis apparatus and a 3rd board | substrate, a 3rd board | substrate and a color synthesis apparatus can be cooled more reliably. Therefore, since the organic polarizing element can be efficiently cooled, deterioration of the image projected by the organic polarizing element, and hence the projector, can be suppressed.

1 is a schematic diagram showing an outline of a projector according to an embodiment of the invention. The schematic diagram which shows the incident side polarizing element, liquid crystal panel, output side polarizing plate, and dichroic prism which concern on the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Projector configuration]
FIG. 1 is a schematic diagram illustrating a schematic configuration of a projector 1 according to the present embodiment.
The projector 1 according to the present embodiment is a projection display device that modulates light emitted from a lighting device to form an image according to image information, and enlarges and projects the image on a projection surface such as a screen. As shown in FIG. 1, the projector 1 includes an exterior housing 2 that forms an exterior, and an apparatus body 3 that is housed in the exterior housing 2.

[Device configuration]
The apparatus main body 3 includes a cooling device 9 that cools an image forming apparatus 4 and a cooling target that constitutes the projector 1. In addition, although not shown, the apparatus main body 3 includes a control device that controls the operation of the entire projector 1 and a power supply device that supplies power to the electronic components constituting the projector 1.

[Configuration of Image Forming Apparatus]
The image forming apparatus 4 forms and projects an image according to image information under the control of the control device. As shown in FIG. 1, the image forming apparatus 4 includes an illuminating device 41, a uniformizing device 42, a color separating device 43, a relay device 44, an electro-optical device 45, a projection optical device 46, and the devices 41 to 45. And an optical component casing 47 housed therein.

The illuminating device 41 emits a light beam to the homogenizing device 42. The illuminating device 41 includes an arc tube 411, a reflector 412 and a collimating lens 413, and a housing 414 that accommodates them. The lighting device 41 corresponds to the light source of the present invention.
The homogenizer 42 uniformizes the illuminance in the plane orthogonal to the central axis of the light beam emitted from the illumination device 41. The homogenizer 42 includes a first lens array 421, a dimmer 422, a second lens array 423, a polarization conversion element 424, and a superimposing lens 425 in the order of incidence of light from the illumination device 41.

The color separation device 43 separates the light beam incident from the uniformizing device 42 into three color lights of red (R), green (G), and blue (B). The color separation device 43 includes dichroic mirrors 431 and 432 and a reflection mirror 433.
The relay device 44 is provided on an optical path of red light having a longer optical path than other color lights among the three separated color lights. The relay device 44 includes an incident side lens 441, a relay lens 443, and reflection mirrors 442 and 444.

  The electro-optical device 45 modulates the separated color lights according to the image information, and then synthesizes the color lights. The electro-optical device 45 includes a field lens 451 provided for each color light, an incident-side polarizing element 5, and a liquid crystal panel 452 as a light modulation device (red, green, and blue liquid crystal panels are referred to as 452R, 452G, and 452B, respectively). ), And the output side polarization element 6, and a dichroic prism 453 as a color synthesis device that synthesizes each modulated color light to form a projected image. The configuration of the incident side polarizing element 5 and the outgoing side polarizing element 6 (particularly, the configuration of the outgoing side polarizing element 6) will be described in detail later.

The projection optical device 46 enlarges and projects the formed projection image on the projection surface. The projection optical device 46 is configured as a combined lens including a plurality of lenses (not shown) and a lens barrel 461 that accommodates the plurality of lenses therein.
Although not shown in detail, the optical component casing 47 includes a component storage member that stores various optical components, and a lid-like member that closes an opening for storing the component formed in the component storage member. . The optical component casing 47 has an illumination optical axis AX set therein, and the devices 41 to 46 are arranged at predetermined positions with respect to the illumination optical axis AX. For this reason, when the illumination device 41 is arranged in the optical component casing 47, the central axis of the light emitted from the illumination device 41 coincides with the illumination optical axis AX.

  In the following description, the Z direction indicates the traveling direction of light emitted from the illumination device 41 and reflected by the reflecting mirror 444, and the X direction and the Y direction are orthogonal to the Z direction and orthogonal to each other. Indicates. In the present embodiment, when the projector 1 is arranged in the above-described normal posture and the Z direction is along the horizontal direction, the Y direction is a direction from bottom to top along the vertical direction, and the X direction is Z When viewed from the direction side, the direction is from right to left along the horizontal direction. Furthermore, the Z direction side refers to the downstream side in the Z direction (Z direction tip side), and the opposite side to the Z direction refers to the upstream side in the Z direction (Z direction base end side). The same applies to the other directions.

[Configuration of incident-side polarizing element]
FIG. 2 is a schematic diagram showing the incident-side polarizing element 5 and the liquid crystal panel 452 (452R), the emitting-side polarizing element 6 and the dichroic prism 453 constituting the electro-optical device 45.
As shown in FIG. 2, the incident-side polarizing element 5 is an organic polarizing plate disposed between the illumination device 41 and the liquid crystal panel 452R, that is, on the opposite side to the Z direction from the liquid crystal panel 452R. The incident side polarizing element 5 has a function of transmitting polarized light in a predetermined direction out of light incident on the incident side polarizing element 5 and absorbing polarized light substantially orthogonal to the predetermined direction. The incident side polarizing element 5 includes a pair of substrates 51 and 52 and a polarizing layer 53. The light that is incident on and emitted from the incident-side polarizing element 5 enters the outgoing-side polarizing element 6 through the liquid crystal panel 452 (453R).

[Configuration of output-side polarizing element]
The output side polarizing element 6 is an organic polarizing element disposed between the liquid crystal panel 452R and the dichroic prism 453, that is, on the Z direction side from the liquid crystal panel 452R. The exit-side polarizing element 6 has a function of transmitting polarized light having a predetermined wavelength among light incident on the exit-side polarizing element 6 and absorbing polarized light having a wavelength other than the predetermined wavelength.
The output side polarizing element 6 includes a first substrate 61, a second substrate 62, an organic polarizing layer 63, a third substrate 64, and a holding member 65.
The first substrate 61 and the second substrate 62 are made of a light-transmitting substrate and are integrated with the organic polarizing layer 63 sandwiched from both sides. The first substrate 61 and the second substrate 62 are each formed in a rectangular plate shape. The dimension along the Z direction of the first substrate 61 is 700 μm ± 100 μm (600 μm or more and 800 μm or less), and the dimension along the Z direction of the second substrate 62 is 1400 μm ± 100 μm (1300 μm or more and 1500 μm or less). is there. That is, the second substrate 62 has a thickness dimension approximately twice that of the first substrate 61.

Moreover, as a material of the 1st board | substrate 61 and the 2nd board | substrate 62, an inorganic type translucent material is mentioned, for example. Examples of the translucent material include silicate glass, borosilicate glass, titanium silicate glass, fluoride glass such as zirconium fluoride, fused quartz, crystal, YAG crystal, fluorite, magnesia, spinel (MgO · Al ₂ Examples include O ₃ ). By forming the first substrate 61 and the second substrate 62 from these inorganic materials, the flatness of each of the substrates 61 and 62 can be improved, and the improvement of the regularity can be achieved. Among these, those having a thermal conductivity of 5 W / mK or more are preferable from the viewpoint of efficiently radiating heat generated from the organic polarizing layer 63 to the outside and lowering the temperature of the organic polarizing layer 63. For this reason, in this embodiment, the 1st board | substrate 61 and the 2nd board | substrate 62 are comprised by the crystal | crystallization (thermal conductivity: 8 W / mK).

The organic polarizing layer 63 is a polarizer composed of a synthetic resin such as polyvinyl alcohol (PVA), polycarbonate, and polyolefin, and has a thickness dimension of 25 μm ± 10 μm (15 μm or more and 35 μm or less) along the Z direction, and is rectangular. It is a film-like member formed in a plate shape.
The organic polarizing layer 63 includes a type called a K-type polarizer, a K sheet, and a KE film, and a type called an H-type polarizer.
For example, a type called a K-type polarizer is a polarizer in which a PVA-based resin is dehydrated to generate a double bond in the main chain. In order to produce a K-type polarizer, for example, the polarizer is uniaxially stretched from a polymer sheet containing a hydroxylated linear polymer such as PVA, and the hydroxylated linear polymer of this polymer sheet is oriented along the stretching direction. And a method of forming a light-absorbing vinylene block segment in the polymer by treating the oriented sheet supported under conditions sufficient to cause contact dehydration of the oriented sheet and bonding to the oriented sheet support.
A type referred to as an H-type polarizer is one in which, for example, iodine or a dye showing dichroism is used for a stretched PVA resin, and a PVA chain is crosslinked with boric acid to obtain a polarizer.

[Junction structure of first substrate and organic polarizing layer]
The 1st board | substrate 61 and the organic polarizing layer 63 are fixed by the adhesion layer, and the 2nd board | substrate 62 and the organic polarizing layer 63 are joined by the inorganic substance.
Specifically, the surface 612 of the first substrate 61 opposite to the Z direction and the surface 631 of the organic polarizing layer 63 on the Z direction side are fixed by an adhesive layer made of an acrylic or silicon adhesive.

[Junction structure of second substrate and organic polarizing layer]
On the other hand, the surface 621 on the Z direction side of the second substrate 62 and the surface 632 on the opposite side to the Z direction of the organic polarizing layer 63 are composed of an Si skeleton having an atomic structure including a siloxane (Si—O) bond, and this Si They are joined by a bond containing a leaving group bonded to the skeleton.
More specifically, a Si skeleton formed by a plasma polymerization method, formed on the surface 632 of the organic polarizing layer 63, including a siloxane (Si—O) bond, and having a crystallinity of 45% or less, and the Si skeleton A first adherend (not shown) having a first bonding layer including a leaving group composed of an organic group bonded to the first substrate and a surface 621 of the second substrate 62 by a plasma polymerization method. By efficiently activating the surface of a plasma polymerized film having a second adherend (not shown) having a first bonding layer and a second bonding layer of the same material, the first bonding layer and the second bonding layer This refers to bonding by developing adhesiveness on the surface. By exhibiting such adhesiveness, the first bonding layer and the second bonding layer can be firmly bonded. The crystallinity of the Si skeleton of the first bonding layer or the second bonding layer is preferably 45% or less, and more preferably 40% or less. As a result, the Si skeleton includes a sufficiently random atomic structure, thereby revealing the characteristics of the Si skeleton.
Here, “activate” means a bond that is not terminated in the Si skeleton (hereinafter referred to as “unbonded bond”) due to elimination of leaving groups on the surface and inside of the first bonding layer and the second bonding layer. ”Or“ dangling bond ”), a state in which this dangling bond is terminated by a hydroxyl group (OH group), or a state in which these states are mixed.
Accordingly, the active hand means an unbonded hand (dangling bond) or a bond in which the unbonded hand is terminated by a hydroxyl group. According to such an active hand, the first bonding layer and the second bonding layer are used. And firmly joined. That is, the surface 621 of the second substrate 62 and the surface 632 of the organic polarizing layer 63 are firmly bonded with an inorganic substance.

[Configuration of third substrate]
The third substrate 64 is a substrate having translucency and disposed on the Z direction side of the first substrate 61. That is, the third substrate 64 is disposed at a position facing the dichroic prism 453 so as to cover substantially the entire surface 611 of the first substrate 61. The third substrate 64 is formed in the same shape as the first substrate 61, and the dimension in the direction along the Z direction of the third substrate 64 is 700 μm ± 100 μm (600 μm or more and 800 μm or less). That is, the third substrate 64 has substantially the same thickness as the first substrate 61 (contacted substrate).
More specifically, since the total value of the thickness dimension of the third substrate 64 and the thickness dimension of the first substrate 61 is 1400 ± 100 μm, the total value is 1400 μm ± 100 μm or less of the thickness dimension of the second substrate 62. It is. In other words, the thickness dimension of the substrate (second substrate 62) opposite to the Z direction of the organic polarizing layer 63, and the substrate (first substrate 61 and third substrate 64) of the organic polarizing layer 63 on the Z direction side. The total value of the thickness dimensions is substantially the same.

  The third substrate 64 is made of a material (heat conductivity: 8 W / mK) that forms the first substrate 61 because heat generated from the organic polarizing layer 63 is conducted through the first substrate 61. It is preferable to be made of a material having high conductivity. For this reason, in the present embodiment, the third substrate 64 is configured by a sapphire substrate (thermal conductivity: 40 W / mK).

  The holding member 65 has a function of holding the first substrate 61 and the second substrate 62 that sandwich the organic polarizing layer 63, and the third substrate 64. The holding member 65 is a substantially clip-like member that fixes the end portions on the Y direction side and the end portions on the opposite side to the Y direction of the first substrate 61, the second substrate 62, and the third substrate 64. In this way, the holding member 65 is fixed in a state where the surface 611 of the first substrate 61 and the surface 641 of the third substrate 64 opposite to the Z direction are in contact with each other, thereby fixing one organic material. An output side polarizing element 6 which is a polarizing element is configured.

[Thermal conduction path in the output side polarization element]
The heat generated in the organic polarizing layer 63 by the incident light is conducted to the first substrate 61 and the second substrate 62 that sandwich the organic polarizing layer 63. Among these, the heat conducted to the second substrate 62 located on the light incident side is radiated by the second substrate 62. On the other hand, the heat conducted to the first substrate 61 located on the light emitting side is conducted to the third substrate 64 in contact with the first substrate 61 so as to be capable of conducting heat, and is radiated by the third substrate 64.

Here, when the temperature rises due to light incident on the organic polarizing layer 63, the first substrate 61 and the second substrate 62 fixed to the organic polarizing layer 63 are slightly enlarged due to thermal expansion. In this case, if the surface 641 on the opposite side to the Z direction of the third substrate 64 is fixed by the surface 611 of the first substrate 61 and any of the adhesive layer and the inorganic material, the third substrate 64 is formed of quartz. Since the thermal expansion coefficient of the first substrate 61 is different from the thermal expansion coefficient of the third substrate 64 formed of sapphire, the third substrate 64 may be peeled off from the surface 611 of the first substrate 61, and the third substrate 64 is surely attached to the third substrate 64. There is a possibility that the heat of the organic polarizing layer 63 cannot be conducted.
On the other hand, in the present embodiment, the first substrate 61, the second substrate 62, and the third substrate 64 in a state where the surface 641 of the third substrate 64 and the surface 611 of the first substrate 61 are in contact with each other by the holding member 65. Are integrated. Thereby, even if the temperature of the organic polarizing layer 63 rises and the first substrate 61 expands due to the heat, the first substrate 61 and the third substrate 64 can be prevented from being separated from each other. The heat can be conducted.

[Cooling gas flow path]
The cooling device 9 is disposed in the exterior housing 2 of the projector 1 and has a function of circulating the cooling gas toward various devices.
For example, the cooling gas R1 flowing from the cooling device 9 flows between the dichroic prism 453 and the exit-side polarizing element 6 in the Y direction as shown in FIG. Specifically, the cooling gas R1 flows between the surface of the dichroic prism 453 opposite to the Z direction and the surface 642 of the output side polarizing element 6 on the Z direction side of the third substrate 64. As a result, the dichroic prism 453 and the third substrate 64 (exit-side polarizing element 6) are cooled.

The projector 1 according to the present embodiment described above has the following effects.
When the temperature of the organic polarizing layer 63 rises, 63 heat of the organic polarizing layer is conducted to the first substrate 61 and the second substrate 62. Further, the third substrate 64 is in contact with the first substrate 61 and the second substrate 62 so as to be capable of conducting heat, and the thermal conductivity of the third substrate 64 is greater than the thermal conductivity of the first substrate 61 and the second substrate 62. Since it is high, the heat conducted to the first substrate 61 is conducted to the third substrate 64 and dissipated. Thus, since the heat of the organic polarizing layer 63 is radiated from the third substrate 64, deterioration of the organic polarizing layer 63 due to the heat can be suppressed. Accordingly, it is possible to suppress the deterioration of the output side polarizing element 6.

Here, when the total thickness dimension of the first substrate 61 and the third substrate 64 exceeds the thickness dimension of the second substrate 62, for example, polarized light having a structure in which the organic polarizing layer is sandwiched between the pair of substrates. Since the thickness dimension of the output-side polarizing element is larger than that of the element, it is difficult to use the output-side polarizing element instead of the polarizing element. For example, when the exit-side polarizing element is employed in a projector or the like, the thickness dimension of the exit-side polarizing element is different, so it is necessary to design the lens position of the projection optical device in the projector again, which is complicated.
On the other hand, according to the present embodiment, the total value of the thickness dimensions of the first substrate 61 and the third substrate 64 is equal to or less than the thickness dimension of the second substrate 62. For this reason, the said output side polarizing element 6 can be arrange | positioned in the space where the conventionally used polarizing element was arrange | positioned. According to this, since the output-side polarizing element 6 can be used in an electronic apparatus such as a conventional projector without designing the lens position, the manufacturing cost of the projector 1 using the output-side polarizing element 6 can be reduced. Can be reduced.

  Since each of the first substrate 61 and the second substrate 62 is fixed to the organic polarizing layer 63 via the inorganic substance and the adhesive layer, the heat of the organic polarizing layer 63 is applied to each of the first substrate 61 and the second substrate 62. Can conduct reliably. In particular, since the first substrate 61 and the organic polarizing layer 63 are fixed via the adhesive layer, the heat of the organic polarizing layer 63 is conducted to the first substrate 61 via the adhesive layer. Therefore, the heat of the organic polarizing layer 63 is reliably conducted to the third substrate 64 through the first substrate 61, and thus the heat of the organic polarizing layer 63 can be reliably radiated from the third substrate 64.

Here, when the temperature of the organic polarizing layer 63 is increased by the incident light, the first substrate 61 and the second substrate 62 fixed with the organic polarizing layer 63 interposed therebetween are slightly enlarged due to thermal expansion. In this case, if the third substrate 64 is fixed to the first substrate 61 via an adhesive layer or the like, the first substrate 61 and the third substrate 64 have different thermal expansion coefficients. The third substrate 64 may be peeled off from 61, and the heat of the organic polarizing layer 63 may not be reliably conducted to the third substrate 64.
On the other hand, in this embodiment, since the holding member 65 holds and integrates the first substrate 61, the second substrate 62, and the third substrate 64, the temperature of the organic polarizing layer 63 increases to increase the first. Even if the substrate 61 expands due to the heat, the heat can be reliably conducted to the third substrate 64. Therefore, since the heat of the organic polarizing layer 63 can be reliably radiated from the third substrate 64, the deterioration of the output side polarizing element 6 can be reliably suppressed.

  Since the third substrate 64 is made of a sapphire substrate, for example, the thermal conductivity of the third substrate 64 can be increased as compared with the case where the third substrate 64 is made of quartz or the like. Thereby, since the heat of the organic polarizing layer 63 can be reliably radiated from the third substrate 64, the organic polarizing layer 63 can be cooled more reliably. Therefore, it is possible to more reliably suppress the deterioration of the output side polarizing element 6.

  Since an organic polarizing element (outgoing side polarizing element 6) having superior polarization separation characteristics as compared with an inorganic polarizing element can be used in the projector 1, the light incident on the outgoing side polarizing element 6 is reliably polarized by the outgoing side polarizing element 6. Since it can be separated, the brightness and contrast of the image projected through the output side polarizing element 6 and the liquid crystal panel 452 can be improved.

  Since the light emitted from the liquid crystal panel 452 enters the output-side polarizing element 6, the light modulated by the liquid crystal panel 452 by the output-side polarizing element 6 can be reliably polarized and separated. Therefore, the brightness and contrast of the projected image can be reliably improved.

  Since the cooling gas R1 from the cooling device 9 flows between the dichroic prism 453 and the third substrate 64, the third substrate 64 and the dichroic prism 453 can be cooled more reliably. Therefore, since the output side polarizing element 6 can be efficiently cooled, deterioration of the image projected by the output side polarizing element 6 and by extension, the projector 1 can be suppressed.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the said embodiment, the 3rd board | substrate 64 decided to have translucency. However, the present invention is not limited to this. For example, the third substrate 64 may not have translucency. In this case, the third substrate 64 only needs to be formed in a substantially donut shape that covers the outer edge of the first substrate 61. According to this, the heat of the first substrate 61 is conducted to the third substrate 64 through the outer edge, and the heat of the organic polarizing layer 63 is radiated from the third substrate 64. There is an effect.

  In the above embodiment, the third substrate 64 is fixed so as to contact the first substrate 61. However, the present invention is not limited to this. For example, in addition to the first substrate 61, the second substrate 62 may be fixed so that the third substrate 64 (sapphire substrate) is in contact therewith. In this case, since the heat of the organic polarizing layer 63 conducted to the second substrate 62 is dissipated from the third substrate 64, the emission side polarizing element 6 can be cooled more efficiently. Therefore, it is possible to further suppress the deterioration of the output side polarizing element 6. In this case, the second substrate 62 may also be formed in the same shape as the first substrate 61.

  In the embodiment, the total value of the thickness dimension of the first substrate 61 and the thickness dimension of the third substrate 64 is equal to or less than the value of the thickness dimension of the second substrate 62 that is not in contact with the third substrate 64. It was. However, the present invention is not limited to this. For example, the total value of the thickness dimension of the third substrate 64 and the thickness dimension of the first substrate 61 may exceed the value of the thickness dimension of the second substrate 62. Even in this case, since the heat of the organic polarizing layer 63 can be radiated from the third substrate 64, the same effect as the above embodiment can be obtained.

In the above embodiment, the third substrate 64, the first substrate 61, and the second substrate 62 are held by the holding member 65 and integrated. However, the present invention is not limited to this. For example, only the third substrate 64 and the first substrate 61 may be held and integrated.
In addition, the holding member 65 holds the third substrate 64, the end portions on the Y direction side of the first substrate 61 and the second substrate 62, and the end portions on the opposite side to the Y direction. However, the present invention is not limited to this. For example, only one of the ends may be held.

  In the above embodiment, the second substrate 62 is bonded to the organic polarizing layer 63 with an inorganic material, and the first substrate 61 is fixed via the organic polarizing layer 63 and the adhesive layer. However, the present invention is not limited to this. For example, both the first substrate 61 and the second substrate 62 may be bonded to the organic polarizing layer 63 with an inorganic substance, or may be fixed via an adhesive layer. Further, the first substrate 61 may be fixed via the organic polarizing layer 63 and the adhesive layer, and the second substrate 62 may be bonded to the organic polarizing layer 63 by an inorganic material.

  In the above embodiment, the third substrate 64 is configured by a sapphire substrate. However, the present invention is not limited to this. For example, the third substrate 64 may be made of a material that partially contains sapphire, or may be made of a material that does not contain sapphire. If necessary, it may be made of a material having higher thermal conductivity than the first substrate 61 and the second substrate 62.

In the said embodiment, the incident side polarizing element 5 was provided. However, the present invention is not limited to this. For example, the incident side polarizing element 5 may not be provided.
The incident side polarizing element 5 is an organic polarizing element. However, the present invention is not limited to this. For example, the incident side polarizing element 5 may be an inorganic polarizing element.

  In the above embodiment, the cooling gas R <b> 1 flowing from the cooling device 9 flows between the dichroic prism 453 and the exit side polarization element 6. However, the present invention is not limited to this. For example, the cooling gas R <b> 1 may flow between the output-side polarizing element 6 and the liquid crystal panel 452. In this case, the third substrate 64 may be held by the holding member 65 so as to be able to conduct heat to the second substrate 62.

  In the embodiment described above, the output-side polarizing element 6 corresponding to the red light liquid crystal panel 452R has the above-described configuration. However, the present invention is not limited to this. For example, the output side polarizing element 6 corresponding to each of the liquid crystal panel 452G for green light and the liquid crystal panel 452G for blue light may have the above-described configuration. The emission-side polarizing elements corresponding to the green light liquid crystal panel 452G and the blue light liquid crystal panel 452G may be inorganic polarizing plates.

  In the above embodiment, the transmissive liquid crystal panel 452 (452R, 452G, 452B) is used as the light modulation device. However, the present invention is not limited to this. For example, instead of the transmissive liquid crystal panel 452 (452R, 452G, 452B), a reflective liquid crystal panel may be used.

In the above embodiment, the projector 1 includes the three liquid crystal panels 452 (452R, 452G, and 452B), but the present invention is not limited to this. That is, the present invention can also be applied to a projector using two or less or four or more liquid crystal panels. Further, a digital micromirror device or the like may be used instead of the liquid crystal panel.
In the above embodiment, the lighting device 41 includes the arc tube 411 and the reflector 412. However, the present invention is not limited to this. For example, the illumination device 41 may include an LED (Light Emitting Diode), an LD (Laser Diode), and the like.

  In the above embodiment, the projector 1 includes the lighting device 41 including one light source device including the arc tube 411 and the reflector 412. However, the present invention is not limited to this. For example, the number of the light source devices may be two or four.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 4 ... Image forming apparatus, 41 ... Illumination device (light source), 45 ... Electro-optical device, 452, 452G, 452R, 452B ... Liquid crystal panel (light modulation device), 453 ... Dichroic prism (color synthesis device), 46: projection optical device, 5: incident side polarizing element, 51 ... substrate, 53 ... polarizing layer, 6 ... emitting side polarizing element (organic polarizing element), 61 ... first substrate (contacted substrate), 62 ... second substrate 63 ... Organic polarizing layer, 64 ... Third substrate, 65 ... Holding member, 9 ... Cooling device, R1 ... Cooling gas.

Claims (8)

A first substrate and a second substrate having translucency;
An organic polarizing layer sandwiched between the first substrate and the second substrate;
A third substrate in contact with the surface of the contacted substrate of at least one of the first substrate and the second substrate opposite to the organic polarizing layer side so as to be able to conduct heat;
The organic polarizing element, wherein the thermal conductivity of the third substrate is higher than the thermal conductivity of the contacted substrate. The organic polarizing element according to claim 1,
The third substrate is in contact with the first substrate of the first substrate and the second substrate;
The organic polarizing element, wherein a total value of thickness dimensions of the first substrate and the third substrate is equal to or less than a thickness dimension of the second substrate. The organic polarizing element according to claim 2,
The first substrate is fixed via the organic polarizing layer and the adhesive layer,
The organic polarizing element, wherein the second substrate is bonded to the organic polarizing layer by bonding including a Si skeleton having an atomic structure including a siloxane bond and a leaving group bonded to the Si skeleton. In the organic polarizing element as described in any one of Claims 1-3,
An organic polarizing element comprising: a holding member that holds and integrates the first substrate, the second substrate, and the third substrate. In the organic polarizing element as described in any one of Claims 1-4,
The organic polarizing element, wherein the third substrate is a sapphire substrate. A light source;
A light modulation device for modulating light emitted from the light source;
A projection optical device for projecting light modulated by the light modulation device;
A projector comprising: the organic polarizing element according to claim 1. The projector according to claim 6,
The light modulation device is a liquid crystal panel,
The projector according to claim 1, wherein the organic polarizing element is disposed on a light emitting side of the liquid crystal panel. The projector according to claim 7,
A color synthesizing device that synthesizes the plurality of color lights incident from a plurality of the light modulation devices provided in accordance with each of the plurality of color lights emitted from the light source;
A cooling device for circulating a cooling gas,
The projector is characterized in that the cooling gas flows between the color composition device and the third substrate.