Coherent light generators – Particular beam control device – Having particular beam control circuit component
Patent
1990-06-19
1992-10-20
Epps, Georgia Y.
Coherent light generators
Particular beam control device
Having particular beam control circuit component
372 25, 372 30, 372 31, 372 38, H01S 313
Patent
active
051576767
ABSTRACT:
An optically controlled laser pulse energy control apparatus and process is disclosed wherein variations in the energy of a portion of the laser beam are used to vary the resistance of a photodetector such as a photoresistor through which a control voltage is fed to a light intensity controlling device through which a second portion of the laser beam passes. Light attenuation means are provided to vary the intensity of the laser light used to control the resistance of the photodetector. An optical delay path is provided through which the second portion of the beam travels before reaching the light intensity controlling device. The control voltage is supplied by a variable power supply. The apparatus may be tuned to properly attenuate the laser beam passing through the intensity controlling device by adjusting the power supply, the optical delay path, or the light attenuating means.
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Epps Georgia Y.
Moser William R.
Sartorio Henry P.
The United States of America as represented by the United States
Valdes Miguel A.
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