Objective lens assembly

Details Objective lens assembly Objective lens assembly

1986-07-01

1988-10-25

Punter, William H.

350525, 350414, G02B 704, G02B 2106, G02B 2102

Patent

active

047799676

ABSTRACT:
An objective lens system having a pair of plano-convex lenses disposed adjacent each other with the convex surfaces facing each other and aligned along common optical axis. A plurality of optical fibers surround the plan-convex lenses to convey light and illuminate an object to be viewed by the objective lens assembly. Adjustably positioned adjacent the second plano-convex lens is a field lens system including an elongate rod lens for conducting the intermediate image from the plano-convex lenses and to relay it to an ocular lens system for viewing by the user.

REFERENCES:
patent: 1848788 (1932-03-01), Loeck
patent: 2533371 (1950-12-01), Heine
patent: 3514186 (1970-05-01), Poncelet
patent: 3861786 (1975-01-01), Badgett
patent: 4664486 (1987-05-01), Landre et al.
Ellsworth et al., "Macroscope Dark Field Illumination System" IBM Tech. Disc. Bull., 9-1976, pp. 1274-1275.

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