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Patent Searching and Data


Title:
OPTICAL SYSTEM, IMAGE DISPLAY DEVICE, AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/063410
Kind Code:
A1
Abstract:
This optical system (100) is provided with a prism (12) and a diffracting optical element (12). Also, the prism (12) has a non-rotationally-symmetric aspheric surface that corrects eccentric aberration, and the diffracting optical element (13) includes a diffracting optical surface (DM) having a lattice structure that is asymmetrical around the optical axis (Ax) of the optical system (100). Considering the refractive index difference of the diffracting optical surface (DM) at the e-line (546.074 nm) to be ΔNe, the following condition is satisfied: 0.53 > ΔNe > 0.005.

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Inventors:
SUZUKI, Kenzaburo (C/O NIKON CORPORATION, 12-1 Yurakucho 1-chome, Chiyoda-k, Tokyo 31, 〒1008331, JP)
Application Number:
JP2011/005831
Publication Date:
May 18, 2012
Filing Date:
October 19, 2011
Export Citation:
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Assignee:
NIKON CORPORATION (12-1, Yurakucho 1-chome Chiyoda-k, Tokyo 31, 〒1008331, JP)
株式会社ニコン (〒31 東京都千代田区有楽町一丁目12番1号 Tokyo, 〒1008331, JP)
International Classes:
G02B17/08; G02B27/02
Domestic Patent References:
WO2009096389A12009-08-06
Foreign References:
JP2001142025A2001-05-25
JPH09258104A1997-10-03
JP2009139897A2009-06-25
JP2001100101A2001-04-13
JP3559624B22004-09-02
Other References:
See also references of EP 2639616A4
Attorney, Agent or Firm:
OHNISHI, Shogo (S.OHNISHI & ASSOCIATES, HIGASHI-IKEBUKURO SS BUILDING 1F 3-20-3, Higashi-Ikebukuro, Toshima-k, Tokyo 13, 〒1700013, JP)
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Claims: