Precision radiation source regulation circuit

Details Precision radiation source regulation circuit Precision radiation source regulation circuit

1975-01-15

1976-07-06

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

250205, 315158, 315159, 356207, 356208, G01N 2122, G01J 132, H05B 3702

Patent

active

039679047

ABSTRACT:
A precision lamp regulation circuit includes a source of AC power, a lamp connected in circuit with the AC source, a transistor switch connected in circuit between the AC source and the lamp, a light sensor optically coupled to respond to the radiation output of the lamp, circuitry for placing the transistor switch in conducting condition at the beginning of a half cycle of applied AC power, and a feedback circuit responsive to the light sensor for placing the transistor switch in non-conducting condition to terminate energization of the lamp during that half cycle of applied AC power.

REFERENCES:
patent: 3800147 (1974-03-01), Shea et al.
"Phototransistor Regulates . . Intensity," Carvajal, Electronics, vol. 38, No. 20, Oct. 4, 1965, p. 101.

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