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):
Report Date:
1987-11-18
Pagination or Media Count:
129.0
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