Apparatus for controlling intensity of laser beam emitted from s

Details Apparatus for controlling intensity of laser beam emitted from s Apparatus for controlling intensity of laser beam emitted from s

1990-12-27

1992-07-28

Epps, Georgia Y.

Coherent light generators

Particular beam control device

Optical output stabilization

372 9, 372 26, 372 38, H01S 310

Patent

active

051346230

ABSTRACT:
In an apparatus for adjusting the intensity of a light beam, the light beam from a semiconductor laser is deflected to scan a photosensitive drum and is detected to generated a positional signal by photodetector outside of the drum. The intensity of the light beam is also detected by a monitor detector and compared with a predetermined value. The comparison result is latched in a first latch circuit in accordance with the positional signal and a driving data is determined in accordance with the latched comparison data. The driving data is also latched in a second latch circuit and the semiconductor laser is controlled depending on the latched driving data.

REFERENCES:
patent: 4802179 (1989-01-01), Negishi
patent: 4821273 (1989-04-01), Hori
patent: 4907236 (1990-03-01), Shimada
patent: 4912714 (1990-03-01), Hatanaka et al.
patent: 4916706 (1990-04-01), Ohashi

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