发明名称 |
Beam splitting for camera using a multilayer film |
摘要 |
A beam splitter for a digital camera splits light passed through a photographing lens into beams directed to a CCD and a finder optical system. The beam splitter includes at least one optical element provided with a beam splitting surface that is inclined with respect to an optical axis of the photographing lens, and a multi-layer film including a plurality of layers of dielectric materials is formed on the beam splitting surface. The multi-layer film is configured such that the beam splitting surface exhibits a substantially constant reflectivity at least for visible light that is incident on the beam splitting surface at any incident angle within a predetermined range.
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申请公布号 |
US6661579(B2) |
申请公布日期 |
2003.12.09 |
申请号 |
US20010772967 |
申请日期 |
2001.01.31 |
申请人 |
PENTAX CORPORATION |
发明人 |
ARAKI KIYOSHI;ITO TAKU;OKUDA ISAO;OONO MASAHIRO;KANAI MORIYASU |
分类号 |
G02B23/14;G02B27/14;(IPC1-7):G02B27/14;H04N5/225 |
主分类号 |
G02B23/14 |
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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