Registers – Coded record sensors – Particular sensor structure
Patent
1976-05-11
1978-05-16
Corbin, John K.
Registers
Coded record sensors
Particular sensor structure
235181, G02B 518
Patent
active
040895890
ABSTRACT:
The optical system includes a point source of monochromatic light which is focused by a first lens onto a frequency plane. A pair of transparencies bearing information in a single-axis density-modulated form are interposed before the frequency plane. The transparencies may be arranged so that the information axis of one is angularly displaced 90.degree. relative to the information axis of the other. A slit is placed at the frequency plane at a 45.degree. angle relative to the axes of the transparencies so that the only light transmitted beyond the frequency plane is that which is passed through the slit. The light passing through the slit is focused by a second lens onto an image plane; and the resulting output image (read parallel to the direction of elongation of the slit) is the mathematical convolution or correlation function of the input signals, depending on whether the slit is placed at a +45.degree. angle or a -45.degree. angle. The output image may be read electronically or stored photographically or otherwise.
REFERENCES:
patent: 2787188 (1957-04-01), Berger
patent: 3492469 (1970-01-01), Silverman
L. J. Cutrona et al., "Optical Data Processing and Filtering Systems," IRE Trans. on Information Theory, June 1960, pp. 386-400.
A. Vander Lugt, "Signal Detection by Complex Spatial Filtering," IEEE Trans. on Information Theory, Apr. 1964, pp. 139-145.
G. W. Stroke, Introduction to Coherent Optics and Holography, Academic Press, New York, 1969, pp. 79-86.
S. H. Lee, "Mathematical Operations by Optical Processing," Optical Engineering, vol. 13, No. 3, May/June 1974, pp. 196-207.
Brockman William Harry
Cannata Robert Frank
Corbin John K.
Iowa State University & Research Foundation, Inc.
Lee John D.
LandOfFree
Optical signal processing system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical signal processing system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical signal processing system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1195124