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Showing 1 to 6 of 6 for “"joint transform correlator (JTC)"”.
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Multi-Reference Pseudo-Random Phase-Encoded Joint Transfrom Correlation
… SLM only in a multi-reference phase encoded joint transform correlator(JTC) compared to an ordinary JTC. Maximal length sequences are shifted to form two dimensional orthogonal arrays referred as m-arrays. The phase mask is used in one step to encode multiple reference images and at the same …
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Properties and processing applications of photoreactive BSO
A joint transform correlator (JTC) using photorefractive Bismuth Silicon Oxide (BSO) as a nonlinear recording medium, and a liquid crystal television (LCTV) as a spatial light modulator (SLM) is implemented. The physical basis of the processes involved in the photoreffactive recording is studied, …
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The investigation of correlator systems utilizing object and frequency space filters
… development of a rotationally invariant optical correlator.<br/><br/>Optical correlation systems are investigated for the purpose of high speed, high discriminant and distortion invariant pattern recognition. A photorefractive joint transform correlator (JTC) using Bismuth Silicon Oxide (BSO) as …
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Bandpass filters for unconstrained target recognition and their implementation in coherent optical correlators
An up-dateable correlator is simulated which is based on the non-degenerate four wave mixing (NDFWM) interaction in the photorefractive material bismuth silicon oxide (Bi12SiO20). Specifically, it is shown that variable bandpass filters can be implemented directly in the correlator by adjusting the …
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Diffraction-based Optical Architectures for Processing One-dimensional Data
… reductions in the dimensionality of individual transformations that can feasibly be implemented at speed and at scale. Questions remain as to the extent to which diffractive photonic integrated chip (DPIC) architectures can be made to function well as intended at high operating frequencies, and …