Image transmission optical system for an endoscope

Details Image transmission optical system for an endoscope Image transmission optical system for an endoscope

1985-09-19

1987-09-15

Corbin, John K.

350573, G02B 934, G02B 2300

Patent

active

046935681

ABSTRACT:
An image transmission optical system for an inflexible-type endoscope comprising two rod-like biconvex lenses, and two thick meniscus lenses which are arranged between the two rod-like biconvex lenses so that convex surfaces of the two thick meniscus lenses face each other, the image transmission optical system being arranged that the brightness is uniform, and curvature of field and astigmatic difference are corrected favorably.

REFERENCES:
patent: 4168882 (1979-09-01), Hopkins

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