Invention Grant
- Patent Title: Phase filter, imaging optical system, and imaging system
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Application No.: US14780972Application Date: 2013-10-16
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Publication No.: US09967441B2Publication Date: 2018-05-08
- Inventor: Takeshi Shimano , Kouichi Sakita , Mitsuhiko Oota
- Applicant: HITACHI MAXELL, LTD.
- Applicant Address: JP Kyoto
- Assignee: MAXELL, LTD.
- Current Assignee: MAXELL, LTD.
- Current Assignee Address: JP Kyoto
- Agency: Miles & Stockbridge P.C.
- Priority: JP2013-072388 20130329
- International Application: PCT/JP2013/078090 WO 20131016
- International Announcement: WO2014/155790 WO 20141002
- Main IPC: G02B3/00
- IPC: G02B3/00 ; G02B27/00 ; G02B27/12 ; G02B3/08 ; G02B27/46 ; H04N5/225 ; H04N5/232 ; H04N5/222 ; G06K9/00 ; G08G1/16
Abstract:
A phase filter 101 is configured to comprise an annular structure rotationally symmetrical about an optical axis, each annular zone including a cross-sectional shape of substantially parabola for uniformly extending incident rays of light on a focal plane and letting the rays overlap with each other.
Public/Granted literature
- US20160057337A1 PHASE FILTER, IMAGING OPTICAL SYSTEM, AND IMAGING SYSTEM Public/Granted day:2016-02-25
Information query
