Laser computer output microfilmer

Details Laser computer output microfilmer Laser computer output microfilmer

1977-05-12

1978-08-22

Gellner, Michael L.

Recorders

Record receiver deforming

346108, 358302, G03B 4100, G01D 942

Patent

active

041092562

ABSTRACT:
A laser driven computer output microfilmer is operable in an optical registration and focus monitoring mode at a higher than normal (recording) frame repetition rate, to thereby avoid flickering in the eyes of the observer. Such increased repetition rate is implemented by selectively feeding a preprogrammed, abbreviated test pattern to the system input, and the test pattern signal also contains instructions for controlling the vertical scan or deflection mirror in a multi-stepped manner such that the mirror advances through or skips over groups of omitted or blanked frame rows.

REFERENCES:
patent: 3448458 (1969-06-01), Carlson et al.
patent: 3965476 (1976-06-01), Wenander et al.
patent: 3985439 (1976-10-01), Keimle

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