Laser light detection system

Details Laser light detection system Laser light detection system

1980-01-23

1982-12-28

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214B, H01J 4014

Patent

active

043663788

ABSTRACT:
An adaptive gain integrator circuit is provided having a first integrator for producing an output which is proportional to the ambient light noise level and the amplitude of the laser illumination signals applied thereto. A second feedback circuit having a noise-only integrator is provided to maintain the noise level applied to the first integrator substantially constant despite wide variations in the amplitudes of ambient light detected by the system, thereby to reduce the false alarm rate and increase the sensitivity of the system.

REFERENCES:
patent: 3761185 (1973-09-01), Blackwell
patent: 4061925 (1977-12-01), Van der Gaag et al.
patent: 4174177 (1979-11-01), Gardner et al.

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