Optical system for an endoscope

Details Optical system for an endoscope Optical system for an endoscope

1977-03-14

1978-09-05

Crowder, Clifford D.

Surgery

Truss

Pad

128 6, 350208, A61B 106, G02B 912

Patent

active

041115295

ABSTRACT:
An optical system for an endoscope having the optical axis of an objective parallely shifted from the center line of an image fiber so that the center of the field of observation of the objective coincides with the position of a forceps means or with the center of the field of illumination of a light guide. The objective comprises first, second and third lens components wherein the first is a negative singlet, the second a positive singlet meniscus and the third a cemented positive doublet and wherein the stop is between the first and second components.

REFERENCES:
patent: 1085868 (1914-02-01), Konig
patent: 1680490 (1928-08-01), Wappler
patent: 2182390 (1939-12-01), Reardon
patent: 2224464 (1940-12-01), Wolf
patent: 2363701 (1944-11-01), Soetbeer
patent: 2519760 (1950-08-01), Hett
patent: 2772601 (1956-12-01), Bertele
patent: 2927574 (1960-03-01), Scholz
patent: 2987960 (1961-06-01), Sheldon
patent: 3279460 (1966-10-01), Sheldon
patent: 3637282 (1972-01-01), Hayamizu et al.
patent: 3871365 (1975-03-01), Chikama

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