Accession Number : ADA182774

Title :   Large Capacity Spatially Multiplexed Optical Memories for Incoherent Correlator Application.

Descriptive Note : Final technical rept. Apr 84-Aug 86,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Yu,Francis T.

Report Date : MAY 1987

Pagination or Media Count : 147

Abstract : We have, in this research program, completed various significant aspects on the study of a Large Capacity Spatially Multiplexed Optical Correlator. They are summarized in the following paragraphs: We have quantitatively analyzed the noise performance of an incoherent optical signal processor. The effects due to temporal coherence and due to spatial coherence were studied. In this period, we have also completed research on a real-time large-capacity rapid-scanning optical correlator utilizing a rotating grating concept. We have shown that the proposed optical scanning correlator is capable of processing large-capacity optical memories with rapid spectrum scanning. With the implementation of a closed-circuit TV system the OSC system can be applied in real-world situations. A study of polychromatic correlation by spectral-spatial matched filtering has been conducted. Application of this technique to large capability spatially multiplexing matched filter synthesis is discussed. This technique offers true color signal detection, which is suitable for color image recognition and identification. We have also developed a joint transform correlation concept. This technique utilizes a magneto-optic device with a liquid crystal light valve. Object functions can be written into a magneto-optic device with a microcomputer, and real-time correlation can be performed with a coherent read out. This technique leads us to the development of an automatic large capacity optical correlator.

Descriptors :   CORRELATION, *GRATINGS(SPECTRA), *DETECTION, *OPTICAL CORRELATORS, *OPTICAL SCANNING, *MEMORY DEVICES, *OPTICAL STORAGE, *SPATIAL DISTRIBUTION, *OPTICAL PROCESSING, *COHERENCE, *READ OUT TECHNIQUES, *MATCHED FILTERS, *MULTIPLEXING, CORRELATORS, CAPACITY(QUANTITY), CLOSED CIRCUIT TELEVISION, COLORS, HIGH RATE, IMAGES, INCOHERENT SCATTERING, KERR CELLS, LIQUID CRYSTALS, MAGNETOOPTICS, MICROCOMPUTERS, NOISE, OPTICS, PERFORMANCE(ENGINEERING), PROCESSING, REAL TIME, RECOGNITION, ROTATION, SCANNING, SIGNALS, SPECTRA, SYNTHESIS

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE