Optical system for an endoscope

Details Optical system for an endoscope Optical system for an endoscope

1986-02-05

1987-07-28

Grieb, William H.

Surgery

Truss

Perineal

A61B 100

Patent

active

046825851

ABSTRACT:
The shaft of an endoscope for passing through a trocar sleeve or a guiding shaft is tapered towards the distal extremity, and this taper is followed proximally by at least one shallowly concave peripheral constriction. The distal objective of the endoscope is thus spaced from the inner walls and distal edges of the trocar sleeve or guiding shaft, so that residues on these inner walls or edges do not contaminate or obscure objective but are instead scraped off by the peripheral constriction.

REFERENCES:
patent: 4215678 (1980-08-01), Heine et al.
patent: 4589404 (1986-05-01), Barath et al.

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