Tunable Filters for Background Rejection.
Final rept. Sep 73-Dec 74,
ISOMET CORP SPRINGFIELD VA
Pagination or Media Count:
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
- Acoustooptic and Optoacoustic Devices
- Optical Detection and Detectors
- Infrared Detection and Detectors