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Title:
DIFFRACTION OPTICAL ASSEMBLY USING FREE CURVE SURFACE PRISM, AND IMAGE CAPTURE DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/108126
Kind Code:
A1
Abstract:
A diffraction optical assembly comprises: a free curve surface prism (14); and a multilayered diffraction optical device wherein a plurality of diffraction device elements (121, 122) are layered on each other and a grating structure diffraction optical face (DM) formed at the interface thereof. The diffraction optical assembly further satisfies the conditional formula 0.005 < (ΔNg + ΔNs) / 2 < 0.45, where ΔNg is the refraction difference in the diffraction optical face (DM) on a g line, and ΔNs is the refraction difference in the diffraction optical face (DM) on an s line.

Inventors:
SUZUKI, Kenzaburo (C/O NIKON CORPORATION, 12-1 Yurakucho 1-chome, Chiyoda-k, Tokyo 31, 〒1008331, JP)
Application Number:
JP2012/000256
Publication Date:
August 16, 2012
Filing Date:
January 18, 2012
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:
G02B5/18; G02B5/04; G02B13/18; G02B17/08; G02B27/42; H04N5/225
Domestic Patent References:
WO2009078357A12009-06-25
Foreign References:
JP2009139897A2009-06-25
JP2009216858A2009-09-24
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:



 
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