Accession Number:

ADA235553

Title:

Fourier Optical Signal Processors.

Descriptive Note:

Rept. for Oct 1987-Sep 1989,

Corporate Author:

ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s):

• Horner, Joseph L.
• Flannery, David L.

Report Date:

1990-04-01

Pagination or Media Count:

45.0

Abstract:

Progress in Fourier optical processing techniques is reviewed with particular emphases on real-time pattern recognition, which recently has received increased interest as the result of new filter formulations that can be implemented with existing spatial light modulators. Architectures for coherent optical correlation, and the recently reported phase-only filters are reviewed. Smart filters which attack the inherent distortion sensitivity of correlation, are reviewed including those suitable for implementation with phase-only modulation. Correlation experiments implementing real-time variation of both input and reference patterns are reviewed. The potential for successful near- term application of these techniques is defined.

Descriptors:

• *SPATIAL FILTERING
• *FORMULATIONS
• *OPTICAL PROCESSING
• COHERENCE
• SENSITIVITY
• OPTICAL CORRELATORS
• VARIATIONS
• CORRELATION
• HOLOGRAPHY
• PATTERNS
• PATTERN RECOGNITION
• FILTERS
• DISTORTION
• FOURIER ANALYSIS
• REAL TIME
• LIGHT MODULATORS
• SIGNAL PROCESSING
• METHODOLOGY

Subject Categories:

• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE