IMAGE SPECTRUM ANALYZER,
Abstract
A scanning device was developed for the purpose of recording a frequency power spectrum in a sample area of a photographic film in the form of a direct read-out. A rotary scanner, using an optical spot sufficiently small to obtain good modulation from a 250 line/mm target, was selected. The signal from the scanner was read out on a frequency analyzer which recorded the power spectrum as a chart trace. The wave form of the scanned film could also be studied in real-time as an oscilloscope trace for immediate analysis. Recorded frequency response at 500 lines/mm was 6 db above background from a random target. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1967
- Accession Number
- AD0663718
Entities
People
- Philip Rosten
Organizations
- The Aerospace Corporation