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Patent Searching and Data


Title:
ENDOSCOPE OBJECTIVE OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/163447
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an endoscope objective optical system capable of changing a field of view to an arbitrarily defined direction without curving an endoscope even in a narrow space. Provided is an endoscope objective optical system which comprises an optical path deflecting prism group PG and a lens group LNS, and a viewing direction A of which is made variable by moving prisms within the optical path deflecting prism group PG, wherein the optical path deflecting prism group PG comprises, in order from the object side, three prisms of a first prism P1, a second prism P2 and a third prism P3, the first prism P1, the second prism P2 and the third prism P3 are disposed close to each other, the viewing direction A is made variable in a first direction DR1 by the rotational movement of the first prism P1 with respect to the second prism P2, and further the viewing direction A is made variable in a second direction DR2 different from the first direction DR1 by the rotational movement of the first prism P1 and the second prism P2 as one piece with respect to the third prism P3.

Inventors:
MORITA Kazuo (2951 Ishikawa-machi, Hachioji-sh, Tokyo 07, 〒1928507, JP)
Application Number:
JP2016/061368
Publication Date:
October 13, 2016
Filing Date:
April 07, 2016
Export Citation:
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Assignee:
OLYMPUS CORPORATION (2951, Ishikawa-machi Hachioji-sh, Tokyo 07, 〒1928507, JP)
International Classes:
G02B13/04; A61B1/00; G02B23/26
Domestic Patent References:
WO2012081349A12012-06-21
WO2011027622A12011-03-10
Foreign References:
JPS4953847A1974-05-25
JP2006204924A2006-08-10
JPH0961722A1997-03-07
JPS50141347A1975-11-13
JP2013215560A2013-10-24
JPS63262613A1988-10-28
Attorney, Agent or Firm:
SAITO Keisuke et al. (Surugadai-shita MK Bldg. 6F, 41-3 Kanda-jimbocho 1-chome, Chiyoda-k, Tokyo 51, 〒1010051, JP)
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