Ranging method and apparatus

Details Ranging method and apparatus Ranging method and apparatus

1986-11-12

1988-09-13

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 4, G01C 308

Patent

active

047705264

ABSTRACT:
A radar ranging system uses a laser transmitter and a single detector for producing the start and stop signals for the time interval measurement. Two reference signals are produced by passing two light portions, decoupled from the laser light to be transmitted to a target, through two different delay lines to the detector. The time difference between the first reference signal and a target signal is a measure for the range to be measured. The time difference between the two reference signals is used as a calibration measure for repeatedly calibrating the system. The true range is calculated by forming the ratio of the two time intervals.

REFERENCES:
patent: 3752582 (1973-08-01), Troll et al.
patent: 4068952 (1978-01-01), Erbert et al.
patent: 4521107 (1985-06-01), Chaborski et al.

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