发明授权
- 专利标题： Diffraction grating lens and method of producing the same, and imaging device in which the same is used
- 专利标题（中）： 衍射光栅透镜及其制造方法以及使用其的成像装置
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申请号： US13143928申请日： 2010-12-28
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公开(公告)号： US08649095B2公开(公告)日： 2014-02-11
- 发明人: Takamasa Ando , Tsuguhiro Korenaga
- 申请人： Takamasa Ando , Tsuguhiro Korenaga
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 代理机构： Renner, Otto, Boisselle & Sklar, LLP
- 优先权： JP2010-004710 20100113
- 国际申请： PCT/JP2010/007601 WO 20101228
- 国际公布： WO2011/086654 WO 20110721
- 主分类号： G02B27/44
- IPC分类号： G02B27/44 ; G02B3/08
摘要：
A diffraction grating lens according to the present invention includes a lens body and a diffraction grating provided on the surface of the lens body, the diffraction grating including a plurality of annular zones having slopes inclined along a width direction and a plurality of step surfaces respectively located between the plurality of annular zones. At least one of the plurality of annular zones is light-transmissive across its entire area along the width direction, and in the at least one annular zone, a light transmittance near at least one of two ends along the width direction is smaller than a light transmittance near a central portion along the width direction.