Lens for use with an optical disk

Details Lens for use with an optical disk Lens for use with an optical disk

1986-05-30

1988-06-28

Corbin, John K.

G02B 906, G02B 912

Patent

active

047535245

ABSTRACT:
A lens system for use with an optical disk comprises, in order from the side of a light source, a front group composed of a cemented lens made up of positive and negative lenses, and a rear group composed of a single positive lens or one positive and one negative lens. The lens system satisfying the following conditions:

REFERENCES:
patent: 4572623 (1986-02-01), Tanaka et al.
patent: 4632520 (1986-12-01), Yamakawa

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