Laser light quantity control device

Details Laser light quantity control device Laser light quantity control device

1997-04-15

1999-10-12

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

372 31, H01S 310

Patent

active

059658681

ABSTRACT:
A laser light quantity control device includes a semiconductor laser element having a plurality of light emitting portions and a light quantity detector for detecting light quantities of the individual light emitting portions. Currents supplied to the individual light emitting portions are controlled by a light quantity adjusting section on the basis of outputs from the light quantity detector. The light quantity adjusting section performs light quantity adjustments of the individual light emitting portions at predetermined time interval.

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patent: 5130524 (1992-07-01), Egawa et al.
patent: 5517151 (1996-05-01), Kubota
patent: 5600126 (1997-02-01), Appel et al.
patent: 5659414 (1997-08-01), Appel et al.
patent: 5734170 (1998-03-01), Ikeda

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