Coded data generation or conversion – Analog to or from digital conversion – Using optical device
Patent
1988-11-25
1991-08-13
Shoop, Jr., WIlliam M.
Coded data generation or conversion
Analog to or from digital conversion
Using optical device,
385 37, 385 27, H03K 1302
Patent
active
050399888
ABSTRACT:
A device is provided for converting optical digital signals to electronic analog signals. A light beam is passed through a series of beam splitters. The transmission coefficient of each beam splitter is equal to the reciprocal of the base of the number of the electronic digital input signal. The beam splitters are arranged in series with the light beam so that the reflected portion of the beam is weighted to be proportional to the significance of a place in the binary number corresponding to its beam splitter. The reflected portion of the beam from each beam splitter is separately modulated in response to an input electronic digital signal for the place in the digital number corresponding to its beam splitter. The reflected portions of the beam from each beam splitter are combined and the combined beam is received by a detector which provides an electronic output which is an analog representation of the digital signal.
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patent: 4617551 (1986-10-01), Ophoff
Carl M. Verber et al., Integrated-Optic Digital-Analog Converter, Applied Optics, vol. 22, No. 23, pp. 3677-3678, Dec. 1, 1983.
Carl M. Verber et al., Correlator Based on an Integrated Optical Spatial Light Modulator, Applied Optics, vol. 29, No. 9, pp. 1626-1629, May 1, 1981.
Sybil P. Parker, editor, McGraw-Hill Dictionary of Scientific and Technical Terms, p. 456.
Deinken John J.
Logan Sharon D.
Rockwell International Corporation
Shoop Jr. William M.
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