초록 ▼

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 i

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.

대표청구항 ▼

A short distance laser ranging system comprising: means for lasing, said means for lasing outputting radiant energy in response to a driver pulse and homodyning with return energy reflected off a target, said lasing means receiving said return energy and amplifying said return energy, said return en

A short distance laser ranging system comprising: means for lasing, said means for lasing outputting radiant energy in response to a driver pulse and homodyning with return energy reflected off a target, said lasing means receiving said return energy and amplifying said return energy, said return energy being received by said lasing means during a dead-time plateau period, said lasing means outputting a return energy signal, means for driving said lasing means, said means for driving substantially eliminating a dead-time plateau of said lasing means whereby said return energy is homodyned, said means for driving including means for generating a drive pulse signal in response to a trigger pulse and means for generating said driver pulse in response to said drive pulse signal from said means for generating a drive pulse signal, said driver pulse driving said lasing means to emit radiant energy, and means for outputting a time signal, said means for outputting reflecting the time duration between outputting said radiant energy and the reception of said return energy, said time signal being representative of the range between said target and said lasing means.