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Patent Searching and Data


Title:
LIGHT PATH DEFLECTION PRISM FOR ENDOSCOPE, AND OBLIQUE-VIEWING ENDOSCOPE OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/193933
Kind Code:
A1
Abstract:
The present invention is configured by bonding a first prism PR1 and a second prism PR2. The first prism PR1 comprises a first polished surface 11a and a second polished surface 11b. The second prism PR2 comprises a third polished surface 11c, a fourth polished surface 11d and a fifth polished surface 11e. A first reflective surface RF1, on which a light beam incident on a light path deflection prism 10 for an endoscope is reflected for the first time, is present on the fifth polished surface 11e of the second prism PR2. A second reflective surface RF2, on which a light beam incident on the light path deflection prism 10 for an endoscope is reflected for the second time, is present on either the second polished surface 11b of the first prism PR1 or the third polished surface 11c of the second prism PR2. A first angle A, which is formed between the first reflective surface RF1 and the second reflective surface RF2, and a second angle B, which is formed between the direction of a normal vector N of the second reflective surface RF2 and the direction of an optical axis AX2 of a lens group 100 positioned on the light beam exit side of the light path deflection prism 10 for an endoscope, satisfy a specified condition.

Inventors:
MORITA Kazuo (2951 Ishikawa-machi, Hachioji-sh, Tokyo 07, 〒1928507, JP)
Application Number:
JP2019/009710
Publication Date:
October 10, 2019
Filing Date:
March 11, 2019
Export Citation:
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Assignee:
OLYMPUS CORPORATION (2951, Ishikawa-machi Hachioji-sh, Tokyo 07, 〒1928507, JP)
International Classes:
G02B23/26; A61B1/00; G02B5/04
Foreign References:
JP2006039259A2006-02-09
JPS62179716U1987-11-14
JPH0882766A1996-03-26
US20140135577A12014-05-15
Attorney, Agent or Firm:
SAITO Keisuke (Surugadai-shita MK Bldg. 6F, 41-3 Kanda-jimbocho 1-chome, Chiyoda-k, Tokyo 51, 〒1010051, JP)
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