Optical printer with character magnification

Details Optical printer with character magnification Optical printer with character magnification

1976-06-14

1978-05-09

Hix, L. T.

Recorders

Record receiver deforming

354 10, 346108, 340324AD, 358300, 178 30, 178 15, H04N 580, H04N 584, G03B 2300

Patent

active

040890082

ABSTRACT:
An optical printer comprises a mechanical scanner, which scans a modulated light beam across a recording medium in a main or horizontal direction at a fixed speed. An acousto-optic deflector performs auxiliary scanning of the beam in a vertical direction onto the mechanical scanner at a constant rate and is connected to a deflection signal generator. The deflection signal generator adjusts the stroke length of auxiliary scan in accordance with the magnification ratio and simultaneously adjusts the frequency of auxiliary scanning by the reciprocal of the magnification rate of the character to be printed. Furthermore, optical density is maintained constant for various character sizes by providing auxiliary gate pulses proportional to the square of the relative character size, which are AND gated with a character information signal to effect a light modulation signal for modulating the beam.

REFERENCES:
patent: 3653067 (1972-03-01), Anderson et al.
patent: 3800303 (1974-03-01), Picquendar et al.
patent: 3820123 (1974-06-01), Ammann
patent: 4000493 (1976-12-01), Spaulding et al.
patent: 4019186 (1977-04-01), Dressen et al.

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