Self-compensating focus system for optical video playback device

Details Self-compensating focus system for optical video playback device Self-compensating focus system for optical video playback device

1975-01-29

1976-05-25

Cardillo, Jr., Raymond F.

Telegraphy

Systems

Simplex-reversing periodic

178 66DD, 178 67A, 1791003V, 250201, H04N 576, G11B 712

Patent

active

039595811

ABSTRACT:
An optical video playback device having a self-compensating focus system Photographic one or more afocal relays for increasing the operating range of such a system.

REFERENCES:
patent: 2972660 (1961-02-01), Toulon
patent: 3588218 (1971-01-01), Hunt et al.
patent: 3673412 (1972-06-01), Olson
patent: 3743395 (1973-07-01), Preuss
patent: 3833769 (1974-09-01), Compaan et al.
patent: 3848095 (1974-11-01), Wohlmut et al.
patent: 3873763 (1975-03-01), Janssen
patent: 3876841 (1975-04-01), Kramer et al.
patent: 3876842 (1975-04-01), Bouwhuis
Rice et al., An Experimental Television Recording and Playback System using photographic Discs, Jour of the SMPTE, Vol. 79, No. 11, pp. 997-1002, 11/70.

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