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Title:
CATADIOPTRIC IMAGING LENS
Document Type and Number:
WIPO Patent Application WO/2013/005620
Kind Code:
A1
Abstract:
This catadioptric imaging lens has, in order from the object side, a first reflective mirror, a second reflective mirror, and a lens group, which are disposed such that the light reflected by the first reflective mirror passes through the lens group after being reflected by the second reflective mirror and forms an image of the object on a prescribed image surface. The first reflective mirror and second reflective mirror are eccentric within a reference plane. The reflective surface of the first reflective mirror is an aspheric surface that is rotationally asymmetrical and has a shape that has a concave surface on the object side within the reference plane and within a first orthogonal plane. The reflective surface of the second reflective mirror is an aspheric surface that is rotationally asymmetrical and has a shape that has a convex surface on the first reflective mirror side within the reference plane and within a second orthogonal plane. The surface of the lens group on the side closest to the second reflective lens is an aspheric surface that is rotationally asymmetrical and has a shape that has concave surface on the second reflective mirror side within the reference plane and has a convex surface on the second reflective mirror side within a third orthogonal plane.

Inventors:
MATSUMOTO, Miho (12-1 Yurakucho 1-chome, Chiyoda-k, Tokyo 31, 〒1008331, JP)
松本 実保 (〒31 東京都千代田区有楽町一丁目12番1号 株式会社ニコン内 Tokyo, 〒1008331, JP)
HIRAYAMA, Yoshikazu (12-1 Yurakucho 1-chome, Chiyoda-k, Tokyo 31, 〒1008331, JP)
平山 義一 (〒31 東京都千代田区有楽町一丁目12番1号 株式会社ニコン内 Tokyo, 〒1008331, JP)
Application Number:
JP2012/066392
Publication Date:
January 10, 2013
Filing Date:
June 27, 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)
MATSUMOTO, Miho (12-1 Yurakucho 1-chome, Chiyoda-k, Tokyo 31, 〒1008331, JP)
松本 実保 (〒31 東京都千代田区有楽町一丁目12番1号 株式会社ニコン内 Tokyo, 〒1008331, JP)
HIRAYAMA, Yoshikazu (12-1 Yurakucho 1-chome, Chiyoda-k, Tokyo 31, 〒1008331, JP)
International Classes:
G02B17/08; G02B5/18
Domestic Patent References:
WO2001006295A12001-01-25
Foreign References:
JP2008268978A2008-11-06
JP2005003804A2005-01-06
JP2008242025A2008-10-09
JP2008242028A2008-10-09
JP2003344772A2003-12-03
JP2004226997A2004-08-12
JP2007164007A2007-06-28
JP2007322811A2007-12-13
JP2001100101A2001-04-13
JP2004233907A2004-08-19
Attorney, Agent or Firm:
NAGAI, Fuyuki et al. (Fukoku Seimei Building 2-2-2, Uchisaiwaicho, Chiyoda-k, Tokyo 11, 〒1000011, JP)
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Claims: