Simultaneous multi-beam optical modulator device using memory ma

Details Simultaneous multi-beam optical modulator device using memory ma Simultaneous multi-beam optical modulator device using memory ma

1990-10-18

1992-01-07

Fuller, Benjamin R.

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359285, G02F 111

Patent

active

050795686

ABSTRACT:
A simultaneous multi-beam optical modulator device which has first modulators for amplitude modulating a plurality of carrier waves according to a plurality of input signals to produce a plurality of modulated signals and an audio optical device for separating an incoming beam of light into a plurality of sub-beams and for, at the same time, optically modulating the sub-beam upon receiving the modulated signals from their respective first modulators, is provided, further comprising an output device for storing indicator signals corresponding to the number of input signals fed to the first modulators and for selecting from these stored signals a signal corresponding to the number of the input signals to the first modulators, a digital/analog converter for converting the signal transmitted from the output device into an analog output which is used to varies the intensity of output light, and a second modulator for amplitude modulating the plural modulated signals transmitted from the first modulators according to the analog output of the digital/analog converter. Accordingly, the intensity of a light output from the audio optical device can be maintained constant.

REFERENCES:
patent: 3744039 (1973-07-01), Hrbeck
patent: 3935566 (1976-01-01), Snopko
patent: 4201455 (1980-05-01), Vadasz et al.

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