Videodisc play-back apparatus with variable width beam

Details Videodisc play-back apparatus with variable width beam Videodisc play-back apparatus with variable width beam

1976-11-01

1978-11-14

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, 17910041L, G11B 712

Patent

active

041258592

ABSTRACT:
Information play-back apparatus comprising a laser source, an information recorded medium, optical means for guiding a laser beam from the laser source to an information recorded track on the information recorded medium, and means for varying the size of the spot of the laser beam on the information recorded track in dependence on the position of the track on the information recorded medium.

REFERENCES:
patent: 1917003 (1933-07-01), Williams
patent: 3829622 (1974-08-01), Elliot
patent: 3894179 (1975-07-01), Jacobs
patent: 3963863 (1976-06-01), Malissin
patent: 3971002 (1976-07-01), Bricot
patent: 3983317 (1976-09-01), Glorioso
patent: 4011400 (1977-03-01), Simons

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