Light quantity compensation apparatus

Details Light quantity compensation apparatus Light quantity compensation apparatus

1983-11-10

1985-10-22

Goldberg, E. A.

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Printing, dotting, or punching marker

Ink transfer support or moving means

369106, G01D 942

Patent

active

045491909

ABSTRACT:
Apparatus for compensating for a quantity of light includes an acoustooptic modulator which modulates light incident thereon in response to a first signal to produce output light. A photoelectric converter is provided for detecting a level of the output light of the acoustooptic modulator to generate a second signal associated with the detected light level. The first signal is compensated for by a compensation circuit in response to the second signal. The compensation circuit has input-to-output characteristics corresponding to linear function which is given by approximating the characteristic of the acoustooptic modulator on the output light relative to the first signal. The compensator compensates for the first signal in accordance with the input-to-output characteristics.

REFERENCES:
patent: 3654624 (1972-04-01), Becker
patent: 3787887 (1974-01-01), Burton
patent: 4162398 (1979-07-01), Kayanuma
patent: 4221960 (1980-09-01), Maeda
Microelectronics, Millman, 1979, pp. 523-527, McGraw Hill.

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