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Title:
PHASE FILTER, IMAGING OPTICAL SYSTEM, AND IMAGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2014/155790
Kind Code:
A1
Abstract:
A phase filter (101) comprises a structure of annular rings with rotational symmetry around the optical axis, the annular rings each having substantially parabolic cross-sections such that incident light beams are uniformly magnified on a focal plane and mutually overlap.

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Inventors:
SHIMANO TAKESHI (JP)
SAKITA KOUICHI (JP)
OOTA MITSUHIKO (JP)
Application Number:
PCT/JP2013/078090
Publication Date:
October 02, 2014
Filing Date:
October 16, 2013
Export Citation:
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Assignee:
HITACHI MAXELL (JP)
International Classes:
G02B5/02; A61B5/117; A61B10/00; B60R1/00; G02B3/08; G02B3/10; G02B5/04; G02B5/18; G03B11/00; G08G1/16; H04N5/232
Foreign References:
JP2007327966A2007-12-20
JP2005331784A2005-12-02
JPH03107799U1991-11-06
JPH07198909A1995-08-01
JP2002244050A2002-08-28
JP2011128238A2011-06-30
Attorney, Agent or Firm:
ISSHIKI & CO. (JP)
All international patent business corporation (JP)
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