Self-detecting optical sensors

Details Self-detecting optical sensors Self-detecting optical sensors

1982-07-14

1985-03-19

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

372 25, 372 38, G01C 308, H01S 300

Patent

active

045055823

ABSTRACT:
A short-ranging laser system having an improved pulser which includes a drive pulse signal generator and a driver. The drive pulse signal generator is essentially a triggered bipolar avalanche transistor that outputs a drive pulse signal through a voltage shifting circuit to the driver. The driver is essentially two parallel-connected power MOSFETs that output a driver pulse to a GaAs heterojunction laser diode. By circuit design, the deadtime plateau is substantially reduced so that the laser return energy homodynes with the still active laser to produce a detectable output for a target within 5 meters.

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patent: 4400812 (1983-08-01), Clark et al.
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