Distal end part of endoscope

Details Distal end part of endoscope Distal end part of endoscope

1989-07-07

1990-07-24

Grieb, William H.

Surgery

Truss

Perineal

A61B 106

Patent

active

049428675

ABSTRACT:
A distal end part of an endoscope which is provided at the distal end of the insert part of the endoscope, comprising an illuminating window through which illuminating light is emitted, a viewing window disposed side by side with the illuminating window to take a light image into an objective optical system, and a single transparent cover continuously covering the respective surfaces of the illuminating and viewing windows, the cover being formed such that the wall thickness thereof is gradually changed at the portion thereof which extends between the illuminating and viewing windows. Accordingly, no illuminating light enters the visual field of the viewing optical system through the transparent cover and it is therefore possible to obtain a clear observation field of view which is free from a ghost or flare.

REFERENCES:
patent: 4500181 (1985-02-01), Takahashi
patent: 4562831 (1986-01-01), Murakoshi et al.

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