High Resolution Optical Power Spectrum Analyzer.
Abstract
The High Resolution Optical Power Spectrum Analyzer (HOPS) was conceived as a better approach to a large volume optical power spectrum (OPS) scanning of imagery. This approach enables conventional OPS measurement coupled with simplified parallel optical film sampling, rather than film scanning. The HOPS is a coherent optical system that lends itself to many applications either proposed or demonstrated, such as pattern recognition, feature extraction and image assessment. Custom configuration of HOPS enables optimum use of off-the-shelf scanning photodiode arrays and adaption to specific film scanning and spectrum sampling requirements. This work demonstrates the basic metric equivalence between HOPS and conventional OPS. It also demonstrates the advantages of the HOPS configuration for OPS measurement. Several configurations of HOPS have been evaluated. A design using linear, self-scanned photodiode arrays with parallel optical trains is recommended. This report presents detailed analysis and measurements supporting HOPS as a highly practical approach to OPS scanning. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1978
- Accession Number
- ADA051845
Entities
People
- N. Balasubramanian
- P. S. Considine