Focus control system with movable mirror

Details Focus control system with movable mirror Focus control system with movable mirror

1976-06-15

1977-09-27

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, H04N 576, G11B 712

Patent

active

040515290

ABSTRACT:
A focus control system for an optical record carrier in which a light beam is reflected by a movable mirror through one objective lens and then directed to the carrier through another objective lens so that the light beam remains focused on the record carrier in spite of fluctuations of the carrier.

REFERENCES:
patent: 3673412 (1972-06-01), Olson
patent: 3873763 (1975-03-01), Janssen

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