发明名称 |
Optical element, polarization illumination device, and projector |
摘要 |
Two polarization conversion element arrays are disclosed. Each polarization conversion element array is composed of a plurality of polarization conversion elements for converting light incident upon the polarization conversion element array to a linearly polarized light beam with a predetermined polarization direction. The plurality of polarization conversion elements are disposed opposite to each other with a predetermined space provided between at about the center of the light-outgoing surface of a lens array in the direction of arrangement. Of the light beams (s-polarized+p-polarized light beams) gathered by the lens array, light beam that is not incident upon the polarization conversion element and passes through the predetermined space is a light beam including a predetermined polarized light beam (s-polarized light beam) that is primarily made to leave the array 320a and an ineffective polarized light beam (p-polarized light beam). Of the light passing through and leaving the space, the required polarized light beam alone can be made to leave as an effective light beam by providing a polarization plate or the like at the light-outgoing side of the space.
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申请公布号 |
USRE39243(E1) |
申请公布日期 |
2006.08.22 |
申请号 |
US20010985390 |
申请日期 |
2001.11.02 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
OGAWA YASUNORI;YAJIMA AKITAKA;USHIYAMA TOMIYOSHI |
分类号 |
G02B5/30;G02B27/28;G02F1/13;G02F1/1335;G02F1/13357;G03B21/00;H04N9/31 |
主分类号 |
G02B5/30 |
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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