Incoherent optical processing

Rhodes, William T.; Sawchuk, Alexander A.

doi:10.1007/3540105220_10

Cited by 12 publications

(4 citation statements)

References 60 publications

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“…Incoherent processors are not affected by phase changes in the I/P plane and do not produce coherent noise. The non-negative real value of the information, on the other hand, necessitates the employment of a variety of methods to execute some image processing applications [17,18]. Linear optical processing may be broken down into space-invariant activities such as correlation and convolution as well as space-variant operations such as coordinate transformations [19] and the Hough transform [20].…”

Section: Optical Processing Architecturementioning

confidence: 99%

Optical Computing: Status and Perspectives

2022

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For many years, optics has been employed in computing, although the major focus has been and remains to be on connecting parts of computers, for communications, or more fundamentally in systems that have some optical function or element (optical pattern recognition, etc.). Optical digital computers are still evolving; however, a variety of components that can eventually lead to true optical computers, such as optical logic gates, optical switches, neural networks, and spatial light modulators have previously been developed and are discussed in this paper. High-performance off-the-shelf computers can accurately simulate and construct more complicated photonic devices and systems. These advancements have developed under unusual circumstances: photonics is an emerging tool for the next generation of computing hardware, while recent advances in digital computers have empowered the design, modeling, and creation of a new class of photonic devices and systems with unparalleled challenges. Thus, the review of the status and perspectives shows that optical technology offers incredible developments in computational efficiency; however, only separately implemented optical operations are known so far, and the launch of the world’s first commercial optical processing system was only recently announced. Most likely, the optical computer has not been put into mass production because there are still no good solutions for optical transistors, optical memory, and much more that acceptance to break the huge inertia of many proven technologies in electronics.

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Section: Optical Processing Architecturementioning

confidence: 99%

Optical Computing: Status and Perspectives

2022

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“…To have a purely optical processor, the CCD camera can be replaced by an optical component such as an optically addressed SLM. The setups of Figures 2 and 3 are coherent optical processors, however incoherent optical processors were also proposed with the advantage of the suppression of the coherent noise 13 . Linear optical processing can be decomposed into spaceinvariant operations such as correlation or convolution or space-variant operations such as coordinates transforms 14 .…”

Section: Classical Architectures Of Optical Processormentioning

confidence: 99%

A short history of optical computing: rise, decline, and evolution

Ambs

2009

SPIE Proceedings

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This paper gives a brief historical review of the development of optical computing from the early years, 60 years ago, until today. All the major inventions in the field were made in the sixties, generating a lot of enthusiasm. However it is between 1980 and 2000, that optical computing had its golden age with numerous new technologies and innovating optical processors been designed and constructed for real applications. Today the field of optical computing has evolved and its results benefit to new research topics such as nanooptics, biophotonics, or communication systems.

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“…where hi 2 is the intensity spread function (PSF). 9 Expressing the relationship in the frequency domain, we have…”

Section: B Equivalence Between the Scanning System And The Incoherenmentioning

confidence: 99%

Scanning holography and two-dimensional image processing by acousto-optic two-pupil synthesis

Poon

1985

J. Opt. Soc. Am. A

152

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An implementation of an acousto-optic heterodyning image processor was reported earlier [Opt. Lett. 4, 317 (1979)]. However, details of that report are limited only to the confirmation of the basic principle of operation. In this paper, we present and emphasize the mathematical structure of the processor. We also compare this processor with other kinds of scanning and nonscanning processors. The analysis is then extended to the defocused case, where the optical transfer function is derived. A potential application of this in scanning holography is discussed.

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Incoherent optical processing

Cited by 12 publications

References 60 publications

Optical Computing: Status and Perspectives

Optical Computing: Status and Perspectives

A short history of optical computing: rise, decline, and evolution

Scanning holography and two-dimensional image processing by acousto-optic two-pupil synthesis

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