Optical information recording/reproducing element

Details Optical information recording/reproducing element Optical information recording/reproducing element

1985-01-10

1987-02-17

Corbin, John K.

G02B 300

Patent

active

046435352

ABSTRACT:
An element of the invention focuses and projects a parallel or substantially parallel light beam onto an optical information recording medium. The element consists of a transparent columnar body having a convex surface as the input surface and a flat surface as the output surface.

REFERENCES:
patent: 2216965 (1940-10-01), Sukumlyn
patent: 3486808 (1969-12-01), Hamblen
patent: 3729253 (1973-04-01), Moore et al.

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