Playback optical system for video discs

Details Playback optical system for video discs Playback optical system for video discs

1983-05-04

1985-03-26

Faber, Alan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369118, G11B 712

Patent

active

045077720

ABSTRACT:
A playback optical system for video discs comprising a light shield plate arranged in the vicinity of the pupil of the read-out lens, said optical system facilitating design of said read-out lens and permitting adjustment of focal length.

REFERENCES:
patent: 3497704 (1970-02-01), Holmes
patent: 3809478 (1974-05-01), Talbot
patent: 3891968 (1975-06-01), McMahon
patent: 3956582 (1976-05-01), Bouwhuis
patent: 3969575 (1976-07-01), Gerritsen
patent: 4037965 (1977-07-01), Weiss
patent: 4062623 (1977-12-01), Suzuki
patent: 4160269 (1979-07-01), Kramer
"Simple Optical Experiments in which Spoiled Filtering Removes the Noise from Pictures" by Jearl Walker, Scientific American, Nov., 1982, pp. 194-206.

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