Laser apparatus with control circuit for stabilizing laser outpu

Details Laser apparatus with control circuit for stabilizing laser outpu Laser apparatus with control circuit for stabilizing laser outpu

1983-06-01

1986-04-01

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

372 31, G01J 132

Patent

active

045800448

ABSTRACT:
A laser light source device in which the intensity of laser light emitted from a laser diode is detected, the detected value of the light intensity is compared with a predetermined value to generate a binary signal, the binary signal is used to control the count mode of an up/down counter, and a current for driving the laser diode is controlled on the basis of the output of the up/down counter, to prevent the intensity of laser light from decreasing.

REFERENCES:
patent: 4097731 (1978-06-01), Krause et al.
patent: 4097732 (1978-06-01), Krause et al.
patent: 4133008 (1979-01-01), Tisue
patent: 4158132 (1979-06-01), O'Dell
patent: 4406996 (1983-09-01), Oka

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