The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 1992
Filed:
Oct. 18, 1990
Hidetoshi Shinada, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
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.