发明申请
US20070052928A1 Optical element, illuminating device, and projection type video display
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光学元件,照明装置和投影型视频显示器
- 专利标题: Optical element, illuminating device, and projection type video display
- 专利标题(中): 光学元件,照明装置和投影型视频显示器
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申请号: US11511218申请日: 2006-08-29
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公开(公告)号: US20070052928A1公开(公告)日: 2007-03-08
- 发明人: Makoto Maeda , Takashi Ikeda
- 申请人: Makoto Maeda , Takashi Ikeda
- 申请人地址: JP Moriguchi City
- 专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人地址: JP Moriguchi City
- 优先权: JP2005-252697 20050831; JP2005-252713 20050831
- 主分类号: G03B21/14
- IPC分类号: G03B21/14
摘要:
An optical element includes a dichroic surface formed by a multilayer dielectric film or the like and a polarized beam splitter surface formed by a multilayer dielectric film or the like. The dichroic surface transmits light (G and R) from a green wavelength band to a red wavelength band irrespective of the polarization directions of light, and reflects light (B) in a blue wavelength band. The polarized beam splitter surface reflects an S-polarized light (Gs) in a green wavelength band. Furthermore, the polarized beam splitter surface transmits an S-polarized light (Bs) and a P-polarized light (Bp) in the blue wavelength band, and also transmits the S-polarized light (Rs) and P-polarized light (Rp) in the red wavelength band.