Sequential beam switching of acousto-optic modulator

Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal

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350358, 365123, H01S 3101, H04B 900

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active

043215645

ABSTRACT:
An acousto-optic modulator beam switching device for use in recording and display systems comprises a source of collimated light; an acousto-optic modulator; said source being capable of being beamed at said modulator; a radio-frequency oscillator capable of providing outputs at a plurality of frequencies; and a switching device coupled to said modulator and to said oscillator means; said switching device allowing each of said plurality of frequencies to be coupled to said modulator in succession, according to a predetermined sequence; the application to the modulator of each of said frequencies causing a corresponding deflection in the angle of the beam exiting from said modulator; said deflected beam having a predetermined power versus time characteristic; said predetermined sequence allowing a first frequency to be coupled to said modulator followed by a second frequency being coupled to said modulator at a time before the deflected beam exiting from said modulator, as a consequence of the application of said first frequency, has reached its maximum level of power.

REFERENCES:
patent: 3727062 (1973-04-01), Foster
patent: 3744039 (1973-07-01), Hrbeh et al.
patent: 3759603 (1976-09-01), Eschler
patent: 3900851 (1975-08-01), Bucy et al.
patent: 3935566 (1976-01-01), Snopko
patent: 4000493 (1976-12-01), Spaulding et al.
patent: 4206347 (1980-06-01), Avicola et al.
patent: 4269482 (1981-05-01), Mori

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