Method for improving the received signal to noise ratio of a...

Details Method for improving the received signal to noise ratio of a... Method for improving the received signal to noise ratio of a...

2007-02-27

2007-02-27

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S004020, C356S004030, C356S005010

Reexamination Certificate

active

10893044

ABSTRACT:
An improved technique for a laser rangefinder includes a pulsed laser sending out a repetition of light pulses and the received signal (light pulse and noise components combined) being analyzed by continuous averaging of successive received signal discrete time sequences, each sequence beginning with the onset of transmitted laser light. Also, a circuit generates high potentials for the laser diode driving circuitry that simultaneously drives the laser diode, having at least one of several beneficial characteristics: It is conveniently synchronous with the light pulse send/receive process to reduce the effects of noise on the receive section. It is energy efficient in converting low battery potentials to higher voltages. Finally, it utilizes a minimized number of components, leading to high product economy.

REFERENCES:
patent: 5298905 (1994-03-01), Dahl
patent: 2004/0213565 (2004-10-01), Kamalov et al.

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