Light pulse detecting system with highly reduced false alarm rat

Details Light pulse detecting system with highly reduced false alarm rat Light pulse detecting system with highly reduced false alarm rat

1988-07-21

1990-01-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250214B, H01J 4014

Patent

active

048975389

ABSTRACT:
The system enables the lowering of the false alarm rate by eliminating, in particular, the spurious pulses created by the detectors themselves. To this effect, it has one or more juxtaposed optical channels to cover the total field. Each optical channel is associated with a pair of detecting elements to form two detecting channels. After amplification and threshold comparison in these channels, the correlation of the two channels is produced to eliminate the spurious signals and select only the useful signal which is simultaneously present on both channels.

REFERENCES:
patent: 3801821 (1974-04-01), Sharpe et al.
patent: 4004852 (1977-01-01), Pentecost
patent: 4028544 (1977-06-01), Jourdan
Patent Abstracts of Japan, vol. 5, No. 191 (P-92) (863), Dec. 5, 1981; and JP-A-56 115 925 (Matsushita Denki Sangyo K.K.) 11-09-1981.

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