Method for stabilizing a modulated light ray

Details Method for stabilizing a modulated light ray Method for stabilizing a modulated light ray

1978-11-13

1980-09-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

1791003N, 331 945S, 346 76L, H01S 310, G11B 700

Patent

active

042219604

ABSTRACT:
A light ray emitted by a light source and which is to be modulated by an acoustic-optical modulator element is stabilized by its intensity being detected before it enters the acoustic-optical modulator element and being used to produce correction signals. The correction signals are used to amplitude-modulate a high-frequency carrier in reverse phase to the change of intensity of the light ray, to produce corrected carrier signals. Then the corrected carrier signals are further amplitude-modulated by control signals to produce modulator signals which are used to modulate the light ray in the acoustic-optical modulator element.

REFERENCES:
patent: 4068197 (1978-01-01), Yamazaki et al.
patent: 4071751 (1978-01-01), Waksberg
patent: 4114180 (1978-09-01), Kayanuma

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