发明名称 |
Projection type color liquid crystal optical apparatus |
摘要 |
A light source optical system for projection 1, dichroic mirrors 21, 22 disposed to have a predetermined included angle beta , a reflection type liquid crystal optical element blocks 31-33 each including a closely contacted converging lens and having a reflection surface and a projection optical system 4 are provided, wherein the normal line of a dichroic mirror surface and the optical axis of incident light form an included angle alpha ; the normal line of the reflection surface and the optical axis of incident light form an included angle gamma ; light emitted from a light source is color-separated so as to become color lights; the color lights are rendered to be parallel light beams, and are modulated and reflected by means of the reflection type liquid crystal optical elements; the reflected light beams are color-synthesized; and the color-synthesized light is projected through a projection lens. A projection type color liquid crystal optical apparatus having a compact shape and a high brightness is obtainable.
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申请公布号 |
US5648860(A) |
申请公布日期 |
1997.07.15 |
申请号 |
US19940198275 |
申请日期 |
1994.02.18 |
申请人 |
AG TECHNOLOGY CO., LTD. |
发明人 |
OOI, YOSHIHARU;WAKABAYASHI, TSUNEO;SERIZAWA, SHIGEYUKI;SONDA, YOSHIYUKI;KUNIGITA, MASAYA;HIRAI, YOSHINORI |
分类号 |
H04N9/31;(IPC1-7):G02F1/133 |
主分类号 |
H04N9/31 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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