Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-06-30
1978-10-31
Corbin, John K.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358199, G02B 2717
Patent
active
041231350
ABSTRACT:
This optical system permits larger tolerances in mirror facet pitch angles for rotating mirror line scanning apparatus without the use of expensive lenses having toroidal and like complex surfaces or lenses employing elements that have one cylindrical surface whose center of curvature lies on or very near the axis of the scanned surface. A lens system having a negative cylindrical element with its axis perpendicular to the plane of deflection is employed in a rotating mirror scanning arrangement. The lens system images the rotating mirror surface on the scan line in an azimuth perpendicular to the plane of deflection of the beam while ringing the collimated rays of the light source in the plane of deflection of the beam to focus in the one scan line.
REFERENCES:
patent: 1962892 (1934-06-01), Chretien
patent: 2944464 (1960-07-01), Rosin
patent: 3750189 (1973-07-01), Fleischer
patent: 3930729 (1976-01-01), Gunn
patent: 3995110 (1976-11-01), Starkweather
Corbin John K.
DEL LOS Reyes B. W.
International Business Machines - Corporation
Roush George E.
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