Coherent light generators – Particular beam control device – Having particular beam control circuit component
Patent
1993-11-12
1995-05-23
Healy, Brian
Coherent light generators
Particular beam control device
Having particular beam control circuit component
372 30, 372 38, 372109, H01S 300
Patent
active
054188067
ABSTRACT:
In a power controlling device for laser emitting apparatus, a laser diode and a photodiode are provided. Current is generated by the photodiode in accordance with the intensity of laser beam received. The current flows across a resistor to generate a voltage, which is compared with a reference voltage. There is further provided a circuit for generating the reference voltage, which includes a pulse signal generating circuit in which a duty cycle of the pulse signal is changeable, and a voltage generator which generates voltage in accordance with the duty cycle of the pulse signal. The laser diode is driven in accordance with the result of comparison of the voltage generated by the resistor with the reference voltage which is adjusted in accordance with the duty cycle of the pulse signal.
REFERENCES:
patent: 4685097 (1987-08-01), van der Put
patent: 4727382 (1988-02-01), Negishi et al.
patent: 4748633 (1988-05-01), Negishi
patent: 4761659 (1988-08-01), Negishi
patent: 4802179 (1989-01-01), Negishi
patent: 4884278 (1989-11-01), Nishimoto et al.
patent: 4884280 (1989-11-01), Kinoshita
patent: 4903273 (1990-02-01), Bathe
patent: 4945541 (1990-07-01), Nakayama
patent: 5015846 (1991-05-01), Okuyama et al.
patent: 5134623 (1992-07-01), Egawa et al.
patent: 5224112 (1993-06-01), Uesaka
patent: 5315606 (1994-05-01), Tanaka
patent: 5349594 (1994-09-01), Ogawa et al.
patent: 5355383 (1994-10-01), Lockard
Asahi Kogaku Kogyo Kabushiki Kaisha
Healy Brian
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