发明名称 |
POLARIZATION CONVERSION DEVICE, POLARIZATION CONVERSION UNIT, AND PROJECTION TYPE VIDEO APPARATUS |
摘要 |
A polarization separation device includes a transmissive substrate formed of crystalline material having a birefringent property and an optical rotatory property, and a polarization separation portion that is provided on an incidence-side surface of the transmissive substrate and transmits P-polarized light and reflects S-polarized light. A reflective element, which reflects the S-polarized light reflected by the polarization separation portion, is disposed substantially in parallel with the transmissive substrate. A phase difference plate is disposed at an emission-side of the transmissive substrate. The P-polarized light, which is transmitted through the polarization separation portion and is incident to the transmissive substrate, is made to be emitted from an emission-side surface of the transmissive substrate while maintaining a polarization plane thereof, and the polarization plane of the P-polarized light transmitted through the transmissive substrate is converted to be as S-polarized light in the phase difference plate.
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申请公布号 |
US2012188471(A1) |
申请公布日期 |
2012.07.26 |
申请号 |
US201113313546 |
申请日期 |
2011.12.07 |
申请人 |
KOBAYASHI SHUHO;MIYABARA MITSURU;SAKURAI MAKOTO;SEIKO EPSON CORPORATION |
发明人 |
KOBAYASHI SHUHO;MIYABARA MITSURU;SAKURAI MAKOTO |
分类号 |
G02F1/13363;G02B27/28;G03B21/14 |
主分类号 |
G02F1/13363 |
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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