Hybrid (optical/electronic) computing and digital optical computing. Final report, 1 September 1985-31 August 1988

Technical Report · Wed Aug 31 04:00:00 EDT 1988

OSTI ID:7129277

Lee, S H

Hybrid optical-analog/electronic computing is performed for optical image processing, optical pattern recognition, and optical solution of partial differential equations. For example, image processing designed and fabricated space-variant filters to optically implement numerous space-variant transformation (e.g., Hough transform for detection of high-order parametric curves, coordinate transforms to detect rotation and scale-invariant features of images, etc.). For spike removal from noisy images, one can develop a new parallel algorithm suitable for optical/analog/electronic hybrid implementation. This parallel algorithm is space-variant and performs better than the space-invariant low-pass filter and the time-consuming median filter. Digital optical computing research develops nonlinear optical devices and studies their uses in parallel architectures for implementation of parallel algorithms. The nonlinear optical devices are based on integrating silicon with PLZT. LPCVD techniques to deposit polycrystalline Si onto the electro-optic PLZT substrate and then recrystallizing the polysilicon using an Ar+ laser are used to produce single crystal silicon grains, to fabricate and test a 12 x 12 electrically addressed spatial light modulator (SLM) array and a 16 x 16 optically addressed SLM array. Optical parallel computing architectures are investigated by different interconnection topologies and holographic optical elements are generated to implement fully interconnected and hypercube interconnected topologies.

• Research Organization: California Univ., San Diego, CA (USA)
• OSTI ID: 7129277
• Report Number(s): AD-A-214502/7/XAB
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990200* -- Mathematics & Computers
ALGORITHMS
ANALOG-TO-DIGITAL CONVERTERS
COMPUTER ARCHITECTURE
COMPUTERS
DETECTION
DIFFERENTIAL EQUATIONS
DIGITAL COMPUTERS
DIGITAL FILTERS
DOCUMENT TYPES
ELECTRONIC EQUIPMENT
EQUATIONS
EQUIPMENT
HOLOGRAPHY
HYBRID SYSTEMS
IMAGE PROCESSING
IMAGES
LASERS
MATHEMATICAL LOGIC
NONLINEAR PROBLEMS
OPTICAL EQUIPMENT
OPTICAL PROPERTIES
PARALLEL PROCESSING
PARAMETRIC ANALYSIS
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
PROCESSING
PROGRAMMING
PROGRESS REPORT