Test circuit for a pulsed-laser detector

Details Test circuit for a pulsed-laser detector Test circuit for a pulsed-laser detector

1993-04-27

1994-11-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

340635, H01J 4014

Patent

active

053650557

ABSTRACT:
A pulsed-laser radar detection apparatus includes a decision network coupled to a photodetector. The decision network generates an output pulse when a signal detected by the photodetector is a valid signal according to predefined criteria which are implemented in the decision network. An indicator provides an audible or visual indication that a valid signal has been detected. According to the present invention, a Q-switched modulator is provided in the field of view of the photodetector to generate a simulated valid signal. A test switch is connected in series with the modulator such that closing the test switch causes a simulated valid signal to be generated by the modulator.

REFERENCES:
patent: 4527158 (1985-07-01), Runnels
patent: 4724312 (1988-02-01), Snaper
patent: 4851661 (1989-07-01), Everett, Jr.
patent: 4990895 (1991-02-01), Juds
patent: 5142142 (1992-08-01), Senechalle et al.

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