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Title:
ENDOSCOPE
Document Type and Number:
WIPO Patent Application WO/2018/207539
Kind Code:
A1
Abstract:
The present invention provides an endoscope capable of maintaining a favorable field of view during dusting in transurethral lithotripsy. The endoscope has a lighting system 101 and an imaging optical system 102 at the tip end and satisfies the following conditional expression (1): 0.1 ≤ (2 × LLI × fL / φL) / LO ≤ 0.9 (1) Where LLI represents the distance between the center OL and the center OIM, OL represents the center of the lighting system 101 closest to the imaging optical system 102, OIM represents the center of the imaging optical system 102, LO represents the observation distance to an object, fL represents the absolute value of the focal length of the lighting system 101, and φL represents the diameter of the light flux of the illumination light incident on the lighting system 101 from a light source.

Inventors:
OZAO Akihiko (2951 Ishikawa-machi, Hachioji-sh, Tokyo 07, 〒1928507, JP)
Application Number:
JP2018/015245
Publication Date:
November 15, 2018
Filing Date:
April 11, 2018
Export Citation:
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Assignee:
OLYMPUS CORPORATION (2951, Ishikawa-machi Hachioji-sh, Tokyo 07, 〒1928507, JP)
International Classes:
G02B23/26; A61B1/00; A61B1/07; G02B13/00
Domestic Patent References:
WO2015107844A12015-07-23
WO2013080831A12013-06-06
Foreign References:
JP2011200428A2011-10-13
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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