Tunable Filters for Background Rejection.
Abstract
The prior work of Dixon, Harris, and Isomet Corp. on the electronically-tunable, collinear-interaction, optical filter was extended with the view toward operation in the infrared spectral range from 0.75 micrometers to 4.0 micrometers. Two filters covering the sub-bands from 0.75 to 1.5 micrometers (Band I) and 1.5 to 2.8 micrometers (Band II) were designed and breadboard models were constructed. Good agreement was obtained between the measured and theoretical of these filters. A third filter (Band III) covering the range from 2.9 micrometers to 4.0 micrometers was designed; a breadboard model was partly constructed. A versatile electronic driver capable of supplying acoustic drive power to all three filters in several different operating modes including manual tune and swept-wavelength was also developed. Further extension of the tunable filter spectral range from 4 to 14 micrometers is reported as the result of a research study. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1976
- Accession Number
- ADA023623
Entities
People
- Delmar Rader
- Harmon Aronson
- M. Fivel
- Peter Williams
- Robert Bonner