发明申请
US20090225215A1 DIFFRACTIVE IMAGING LENS, DIFFRACTIVE IMAGING LENS OPTICAL SYSTEM, AND IMAGING APPARATUS USING THE DIFFRACTIVE IMAGING LENS OPTICAL SYSTEM
有权
衍射成像镜头，衍射成像镜头光学系统，以及使用差分成像镜头光学系统的成像设备
- 专利标题： DIFFRACTIVE IMAGING LENS, DIFFRACTIVE IMAGING LENS OPTICAL SYSTEM, AND IMAGING APPARATUS USING THE DIFFRACTIVE IMAGING LENS OPTICAL SYSTEM
- 专利标题（中）： 衍射成像镜头，衍射成像镜头光学系统，以及使用差分成像镜头光学系统的成像设备
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申请号： US12300732申请日： 2007-05-11
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公开(公告)号： US20090225215A1公开(公告)日： 2009-09-10
- 发明人: Tsuguhiro Korenaga , Takamasa Ando , Masa-aki Suzuki
- 申请人： Tsuguhiro Korenaga , Takamasa Ando , Masa-aki Suzuki
- 申请人地址： JP Kadoma-shi, Osaka
- 专利权人： PANASONIC CORPORATION
- 当前专利权人： PANASONIC CORPORATION
- 当前专利权人地址： JP Kadoma-shi, Osaka
- 优先权： JP2006-135577 20060515
- 国际申请： PCT/JP2007/059772 WO 20070511
- 主分类号： H04N5/225
- IPC分类号： H04N5/225 ; G02B5/18 ; G02B1/10 ; G02B27/44
摘要：
A diffractive imaging lens 10 includes a surface on which a diffraction grating pattern is formed. The diffraction grating pattern is formed of a plurality of steps formed concentrically with an optical axis (25) at a center. The diffraction grating pattern is formed such that a first portion where amounts (di) of the steps are substantially the same in a radial direction of concentric circles and a second portion, outside of the first portion, where amounts (di) of the steps decrease with distance from the optical axis 25 are provided, or such that the amounts (di) of the steps decrease with distance from the optical axis 25 over the entire diffraction grating pattern.