- 专利标题： Anti-reflection coating, optical member, exchange lens unit and imaging device
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申请号： US12392297申请日： 2009-02-25
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公开(公告)号： US08125714B2公开(公告)日： 2012-02-28
- 发明人: Kazuhiro Yamada , Hiroyuki Nakayama , Mineta Suzuki
- 申请人： Kazuhiro Yamada , Hiroyuki Nakayama , Mineta Suzuki
- 申请人地址： JP Tokyo
- 专利权人： Pentax Ricoh Imaging Company, Ltd.
- 当前专利权人： Pentax Ricoh Imaging Company, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Greenblum & Bernstein, PLC
- 优先权： JP2008-047421 20080228
- 主分类号： G02B1/10
- IPC分类号： G02B1/10
摘要：
An anti-reflection coating comprising first to seventh layers formed on a substrate in this order, the first layer being an alumina-based layer, the seventh layer being a porous, silica-based layer, and each of the first to seventh layers having predetermined refractive index and optical thickness in a wavelength range of 400-700 nm.