Pattern generation system

Details Pattern generation system Pattern generation system

1988-08-26

1990-09-11

Reinhart, Mark J.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

350433, 2504921, 358298, G01D 1516, H04N 121, G02B 304, A61N 500

Patent

active

049566504

ABSTRACT:
An improved pattern generation system. The pattern generation system of the present invention discloses an improved optical system for correcting problems of astigmatism and ellipticity in a radiant energy beam used for generating patterns on a workpiece. The present invention further discloses improved control circuitry for controlling modulation of said beams. The control circuitry corrects for problems of isofocal bias caused by non-linearities in the turn-on/turn-off of the beams.

REFERENCES:
patent: 3974507 (1976-08-01), Chemelli
patent: 4700201 (1987-10-01), Sato
patent: 4727430 (1988-02-01), Miwa
patent: 4796038 (1989-01-01), Allen et al.

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