Journal Article10.1109/TAC.1959.1104862
Coherent optical data processing
TL;DR: This paper discusses the theory behind optical channels and filters, and illustrates simple multi-channel optical systems which can carry out representative operations.
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Abstract: Coherent optical systems, which utilize the wave nature of light and the consequent diffraction phenomena, may often be used to supplement or even replace complex electronic equipment. Such systems are particularly adapted to the performance of certain linear mathematical operations, particularly those of an integral transform nature such as spectral analysis, convolution, auto- and cross-correlation, and matched filtering. The two-dimensional nature of optical systems, contrasted with the inherent one-dimensional nature of an electronic channel, allows a great reduction in equipment complexity for certain classes of operations. This paper discusses the theory behind optical channels and filters as outlined above, and also illustrates simple multi-channel optical systems which can carry out representative operations.
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Citations
Introduction to the Special Issue on Optical Computing
David P. Casasent,S. Horvitz +1 more
TL;DR: This Special Issue on Optical Computing aptly reflects the broad aspects of computing for which this journal was intended and is appropriate for what some may consider an unusual special issue.
4
Design concepts for an on-board parallel image processor
TL;DR: A compact parallel image processing system concept has been developed that uses off-axis paraboloidal mirror segments as collimating, Fourier transforming and image reconstructing elements, and the use of a GaAs laser diode as the coherent radiation source.
4
The role of coherent optical systems in data processing
Louis J. Cutrona
- 26 Apr 1966
TL;DR: A number of signal processing techniques in which coherent optical techniques play an important role are described, some of which are powerful and of great versatility.
1
Computer application of electro-optics
W. J. Poppelbaum
- 26 Apr 1966
TL;DR: It might be useful to examine all those areas where patient development has produced reasonably low-cost designs that have proved themselves in practice or are about to do so.
Optical Techniques in Communication Systems
L.J. Cutrona
- 01 Jan 1966
TL;DR: In this paper, the authors focus on optical techniques in communication systems and present a multichannel spectrum analysis of a two-dimensional transparency having variable density or transmission, whereas the light distribution in a second plane is the output.
References
Interference Microscope with Total Wavefront Reconstruction
Dennis Gabor,W. P. Goss +1 more
TL;DR: In this article, an interference microscope is described, in which three-dimensional objects can be reconstructed, correctly incorporating amplitudes and phases, from two photographs simultaneously taken on one plate.
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Fourier Treatment of Optical Processes
TL;DR: In this article, the wave-number spectrum is defined as the complex conjugate of the n-dimensional Fourier transform of the weighting function, and the wave number spectrum of the flux distribution modified by any number of successive linear operations.
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Analysis and Synthesis of Optical Images
TL;DR: In this paper, the formation of an optical image by a lens is often treated so that the image appears as the double Fourier transform of the object, limited by the aperture of the lens and other stops.
Spatial filtering in optics
TL;DR: In the case of coherent illumination, it is shown that the optical analog of such well-known electrical concepts as equalization, edge-sharpening, and the detection of periodic and isolated signals in the presence of noise can be carried out with relative ease.
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