Signal noise filtration for laser beam recording system

Details Signal noise filtration for laser beam recording system Signal noise filtration for laser beam recording system

1976-12-21

1978-10-31

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003GN, 1791003P, 1791003V, 346 76L, 346108, H04N 576, G11B 712

Patent

active

041237803

ABSTRACT:
The invention provides a system for optically recording information on a recording medium. A light source emits a laser light beam and an optical system, including a lens, focuses the laser beam spot on the recording medium. The light intensity of the laser beam is modulated responsive to an information signal. The light modulator is in a path between the light source and the optical system. A noise component is detected in the laser light beam passing through the light path and removed therefrom. The optical system records the information on the recording medium by the laser light beam, in which the noise component has been removed, and on which the information has been applied by the light modulator.

REFERENCES:
patent: 2297450 (1942-09-01), Becker
patent: 3654624 (1972-04-01), Becker et al.

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