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
Miscellaneous
No indication
English
A MEMS Tunable Optical Ring Resonator Filter
British Library Online Contents | 2005
|A tunable subwavelength resonant grating optical filter
IEEE | 2002
|ThV2 A Tunable Subwavelength Resonant Grating Optical Filter
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|High Speed Tunable Optical Filter with Variable Channel Spacing
British Library Conference Proceedings | 1994
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