Flat field optical scanning system

Details Flat field optical scanning system Flat field optical scanning system

1977-02-23

1978-07-11

Corbin, John K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

350 66, 358143, G02B 2717

Patent

active

040998290

ABSTRACT:
An optical system for scanning a light beam on a flat field surface includes a source of a diverging light beam, a scanner for redirecting the light beam over the surface of the flat field and a single converging meniscus lens disposed in the optical path between the scanner and the flat field surface for focusing the diverging light beam as a point at all locations on the flat field. The diverging light beam which may be from a laser light source and the scanner have the effect of making the source appear to move along a spherical path which compensates for the petzval curvature of the converging lens, thereby providing focusing on a flat field surface with a single focusing element.

REFERENCES:
patent: 3087987 (1963-04-01), Stone
patent: 3172941 (1965-03-01), Norman
patent: 3520586 (1970-07-01), Bousky
patent: 3870394 (1975-03-01), Ploeckl
patent: 3973825 (1976-08-01), Starkweather
patent: 4019804 (1977-04-01), Collier

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