Solid state filter with active crystal element increases sensitivity and resolution of passive and active spectrometers. Filter is capable of ranging through infrared and visible spectra, can be built as portable device for field use, and is suitable for ecological surveying, for pollution detection, and for pollutant classification.
Tunable acoustical optical filter
NASA Tech Briefs ; 1 , 3
1977-01-01
Sonstige
Keine Angabe
Englisch
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