Pulsed light detection circuit

Details Pulsed light detection circuit Pulsed light detection circuit

1985-06-04

1986-09-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214RC, H01J 4014

Patent

active

046148663

ABSTRACT:
Improved circuitry for detecting pulsed infrared light which is particularly suitable for use with laser therapeutic devices. Laser therapeutic devices generally utilize pulsed laser energy of infrared wavelengths. Because such light is invisible the operator of the therapeutic device cannot determine if it is actually working. The invention provides pulsed infrared light detection circuitry which is very compact so that it may be made part of the therapeutic device. The circuitry includes an infrared sensitive transducer coupled to the input of an inverting operational amplifier, a peak detector coupled to the output of the inverting amplifier, and a non-inverting amplifier coupled to the output of the peak detector for driving a display to indicate the detection of pulsed infrared energy.

REFERENCES:
patent: 3604941 (1971-09-01), Crum
patent: 4087799 (1978-05-01), Brouwer
patent: 4334776 (1982-06-01), Jones
patent: 4459475 (1984-07-01), Flint et al.

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