Invention Grant
- Patent Title: Diffraction optical system using free curve surface prism, and image capturing device
- Patent Title (中): 衍射光学系统采用自由曲面棱镜和摄像装置
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Application No.: US13982788Application Date: 2012-01-18
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Publication No.: US09459384B2Publication Date: 2016-10-04
- Inventor: Kenzaburo Suzuki
- Applicant: Kenzaburo Suzuki
- Applicant Address: JP Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP Tokyo
- Agency: Shapiro, Gabor and Rosenberger, PLLC
- Priority: JP2011-024279 20110207
- International Application: PCT/JP2012/000256 WO 20120118
- International Announcement: WO2012/108126 WO 20120816
- Main IPC: G02B5/18
- IPC: G02B5/18 ; G02B17/08 ; G02B27/00 ; G02B27/42
Abstract:
A diffraction optical system comprises a free curve surface prism (14), and a multilayer diffractive optical element in which a plurality of diffractive element members (121, 122) are laminated together and a diffractive optical surface (DM) having a grating structure is formed at the interface thereof. The diffraction optical system further satisfies the following conditional expression: 0.005
Public/Granted literature
- US20130308191A1 DIFFRACTION OPTICAL SYSTEM USING FREE CURVE SURFACE PRISM, AND IMAGE CAPTURING DEVICE Public/Granted day:2013-11-21
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