Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
INFRARED IMAGE CAPTURE DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/124316
Kind Code:
A1
Abstract:
An infrared optical assembly (10) comprises: an object optical assembly (13), further comprising a primary mirror (11) and an auxiliary mirror (12) which are positioned opposite one another along an optical axis (AX), wherein infrared rays from a detected object (not shown) are reflected first by the primary mirror (11), then the auxiliary mirror (12), forming an intermediate image of the detected object. A non-transmitting portion (12f) is present at the center part of the auxiliary mirror (12) whereupon the infrared rays from the detected object are not transmitted. The non-transmitting portion (12f) of the center part of the auxiliary mirror (12) is formed in a concave surface shape which satisfies formula (1), hereinafter: L / 1.2 < R < 1.5L (1); where R is the absolute value of the radius of curvature of the center part of the auxiliary mirror (12) which corresponds to the non-transmitting portion (12f), and L is the distance from the intermediate image formation site to the center part of the auxiliary mirror which corresponds to the non-transmitting portion.

Inventors:
SUDO, Kenta (C/O NIKON CORPORATION, 12-1 Yurakucho 1-chome, Chiyoda-k, Tokyo 31, 〒1008331, JP)
Application Number:
JP2012/001767
Publication Date:
September 20, 2012
Filing Date:
March 14, 2012
Export Citation:
Click for automatic bibliography generation   Help
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; G02B13/14; G02B23/02
Foreign References:
JPH10206986A1998-08-07
JPH08129135A1996-05-21
JPH0756089A1995-03-03
JPS5768811A1982-04-27
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)
Download PDF:
Claims: