Optical device and projection device using the optical device which reduce registration shift caused by heat
First Claim
1. An optical device comprising:
- a light synthesis prism that synthesizes incident light beams which are incident to a plurality of incidence surfaces and outputs the synthesized light beams;
a light modulation unit that includes an optical compensation element and a reflective light modulation device; and
a fixing member that fixes a reflective polarization element and the light modulation unit to the light synthesis prism so as to correspond to one of the incidence surfaces,wherein the light modulation unit includesa light blocking member that blocks light from reaching the light modulation unit and limits light with which the optical compensation element and the reflective light modulation device are irradiated, to light passing an aperture portion; and
a heat insulating member that comes into contact with the light blocking member and the fixing member,wherein the light blocking member includes;
a heat insulating member contact portion that comes into contact with the heat insulating member; and
a light blocking portion that has the aperture, andwherein the light blocking portion and the heat insulating member contact portion have a step difference of a predetermined height.
2 Assignments
0 Petitions
Accused Products
Abstract
An optical device includes: a light synthesis prism that synthesizes incident light beams which are incident to a plurality of incidence surfaces and outputs the synthesized light beams; a light modulation unit that includes an optical compensation element and a reflective light modulation device; and a fixing member that fixes a reflective polarization element and the light modulation unit to the light synthesis prism so as to correspond to one of the incidence surfaces, wherein the light modulation unit includes a light blocking member that blocks light from reaching the light modulation unit and limits light with which the optical compensation element and the reflective light modulation device are irradiated, to light passing an aperture portion; and a heat insulating member that comes into contact with the light blocking member and the fixing member.
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Citations
9 Claims
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1. An optical device comprising:
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a light synthesis prism that synthesizes incident light beams which are incident to a plurality of incidence surfaces and outputs the synthesized light beams; a light modulation unit that includes an optical compensation element and a reflective light modulation device; and a fixing member that fixes a reflective polarization element and the light modulation unit to the light synthesis prism so as to correspond to one of the incidence surfaces, wherein the light modulation unit includes a light blocking member that blocks light from reaching the light modulation unit and limits light with which the optical compensation element and the reflective light modulation device are irradiated, to light passing an aperture portion; and a heat insulating member that comes into contact with the light blocking member and the fixing member, wherein the light blocking member includes; a heat insulating member contact portion that comes into contact with the heat insulating member; and a light blocking portion that has the aperture, and wherein the light blocking portion and the heat insulating member contact portion have a step difference of a predetermined height. - View Dependent Claims (2, 3, 4)
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5. An optical device comprising:
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a light synthesis prism that synthesizes incident light beams which are incident to a plurality of incidence surfaces and outputs the synthesized light beams; a light modulation unit that includes an optical compensation element and a reflective light modulation device; and a fixing member that fixes a reflective polarization element and the light modulation unit to the light synthesis prism so as to correspond to one of the incidence surfaces, wherein the light modulation unit includes a light blocking member that blocks light from reaching the light modulation unit and limits light with which the optical compensation element and the reflective light modulation device are irradiated, to light passing an aperture portion; and a heat insulating member that comes into contact with the light blocking member and the fixing member, wherein the light blocking member can change between a first state and a second state which are different from each other in an amount of limiting light which passes the aperture portion. - View Dependent Claims (6, 7)
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8. A projection device comprising:
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a light source; an optical device that separates light beams emitted from the light source according to wavelength bands for modulation and synthesizes and emits the modulated light beams; and a projection means for projecting and outputs the light beams emitted from the optical device, wherein the optical device includes a light synthesis prism that synthesizes incident light beams which are incident to a plurality of incidence surfaces and outputs the synthesized light beams; a light modulation unit that has an optical compensation element and a reflective light modulation device; and a fixing member that fixes a reflective polarization element and the light modulation unit to the light synthesis prism so as to correspond to one of the incidence surfaces, and the light modulation unit includes a light blocking member that blocks light from reaching the light modulation unit and limits light with which the optical compensation element and the reflective light modulation device are irradiated, to light passing an aperture portion; and a heat insulating member that comes into contact with the light blocking member and the fixing member, and the light blocking member includes a heat insulating member contact portion that comes into contact with the heat insulating member; and a light blocking portion that has the aperture, in which the light blocking portion and the heat insulating member contact portion have a step difference of a predetermined height. - View Dependent Claims (9)
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Specification