Title:
IMAGING OPTICAL SYSTEM AND IMAGING DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2010/055599
Kind Code:
A1
Abstract:
Provided is an imaging optical system wherein generation of flare and ghost which cause image quality deterioration can be sufficiently suppressed. An imaging optical system (7) is provided with, in sequence from an object side to an image surface side, an aperture stop (5), a biconvex first lens (1) having a positive power as an optical member, a second lens (2) which has a negative power and is composed of a meniscus lens having a concave lens surface on the image surface side, a third lens (3) which has a positive power and is composed of a meniscus lens having a convex lens surface on the image surface side, and a fourth lens (4) which has a negative power and has a concave lens surface in the vicinity of an optical axis on the image surface side. On an effective aperture section on a lens surface (e) on the image surface side of the second lens (2), a total reflection surface which totally reflects incoming beams outside the angle of view is provided.
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Inventors:
IBA TAKUMI
YAMASHITA MASATOSHI
YAMASHITA MASATOSHI
Application Number:
PCT/JP2009/003752
Publication Date:
May 20, 2010
Filing Date:
August 05, 2009
Export Citation:
Assignee:
PANASONIC CORP (JP)
IBA TAKUMI
YAMASHITA MASATOSHI
IBA TAKUMI
YAMASHITA MASATOSHI
International Classes:
G02B13/18; G02B13/00; G03B11/00; H04N5/225
Foreign References:
| JPH11337709A | 1999-12-10 | |||
| JP2005025074A | 2005-01-27 |
Attorney, Agent or Firm:
IKEUCHI SATO & PARTNER PATENT ATTORNEYS (JP)
Patent business corporation Ikeuchi and Sato and partners (JP)
Patent business corporation Ikeuchi and Sato and partners (JP)
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