Accession Number : ADA190076

Title :   Study of Microcomputer-Based Real-Time Programmable Optical Signal Processor and Application.

Descriptive Note : Final rept. 1 Aug 86-30 Sep 87,

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

Personal Author(s) : Yu, Francis T

PDF Url : ADA190076

Report Date : 18 Nov 1987

Pagination or Media Count : 129

Abstract : We have, in this period, developed a microcomputer-based optical linear transformation processing technique. The technique utilizes a systolic array processing method to perform various types of linear transformations, such as discrete Fourier transformation, discrete Hilbert transformation, discrete chirp-Z transformation and many others. By partially parallel addressing two magneto-optic spatial light modulators (MOSLM), this proposed system would offer high speed and parallel processing capability of optics and programmability of microcomputer. In this research, we have shown that a color liquid crystal television (LCTV) can be used for color pattern recognition. The grid structure of the display panel together with a specially designed color filter provides spatially isolated polychromatic spectra to enable polychromatic signal detection. We have found a serious drawback of the color LCTV which is the lack of space invariance, even after it has been immersed in a liquid gate. This drawback is primarily due to the inherent color filter in the liquid crystal display and the phase modulation by liquid crystal molecules. A quantitative investigation of space variance of the LCTV, especially the color LCTV, is currently being studied.

Descriptors :   *COLOR TELEVISION, *LIQUID CRYSTALS, *MICROCOMPUTERS, *OPTICS, *PANELS, *PARALLEL PROCESSING, *PATTERN RECOGNITION, *PHASE MODULATION, *TRANSFORMATIONS(MATHEMATICS), CHIRP RADAR, COLORS, DETECTION, DISCRETE FOURIER TRANSFORMS, FILTERS, FOURIER TRANSFORMATION, GATES(CIRCUITS), GRIDS, ISOLATION, LINEAR SYSTEMS, LIQUIDS, MOLECULES, SIGNALS, SPECTRA, TRANSFORMATIONS

Subject Categories : Computer Hardware
      Optics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE