Thermometer for remotely measuring temperature

Details Thermometer for remotely measuring temperature Thermometer for remotely measuring temperature

1978-10-02

1980-11-11

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

73339A, 73355R, 73359A, 250351, 331155, G01J 100, G01K 100, H03B 530

Patent

active

042335124

ABSTRACT:
A thermometer is provided for remotely measuring the temperature of a heat source. The device utilizes an infrared sensor for detecting the temperature of a remote object and an output of the sensor is processed and used to drive a meter or other display device. An improved resonant circuit is provided for modulating the radiant energy impinging on the sensor to produce a pulsed output from the sensor. The modulating circuit includes a piezoelectric reed which deflects under an applied frequency and is located in the optical path of the system. The reed serves as an active element in an improved phase-locked loop used to drive and stabilize the optical chopper.

REFERENCES:
patent: 3616638 (1971-11-01), Bennett et al.
patent: 3925668 (1975-12-01), Anderson et al.
patent: 3999433 (1976-12-01), Taplin

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