- 专利标题: Illumination optical system and projection display optical system
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申请号: US10774812申请日: 2004-02-09
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公开(公告)号: US07114812B2公开(公告)日: 2006-10-03
- 发明人: Jun Koide
- 申请人: Jun Koide
- 申请人地址: JP Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JP Tokyo
- 代理机构: Morgan & Finnegan, LLP
- 优先权: JP2003-034422 20030212
- 主分类号: G03B21/26
- IPC分类号: G03B21/26 ; G03B21/14 ; G03B21/00 ; G03B21/20
摘要:
An illumination optical system which can use light from a light source with high efficiency and can provide an illumination luminous flux with highly uniform illuminance, is disclosed. The illumination optical system illuminates an illumination surface with a generally telecentric illumination luminous flux. In light intensity distribution of illumination light on the illumination surface changing depending on a deviation angle of an incident ray with respect to a normal to the illumination surface, the illumination optical system operates the illumination luminous flux such that a ratio of angle widths at which light intensity reaches half of a peak value in each of two axis directions orthogonal to each other on the illumination surface is an aspect ratio of 2:1.