Tunable, Narrowband Filter for LWIR Hyperspectral Imaging Open PDF Document Details Document Type Technical Report Publication Date Jun 18, 1999 Accession Number AD1030171 Entities People Ed Johnson Tags Communities of Interest Advanced Electronics Sensors Weapons Technologies DTIC Thesaurus Topics Air Force Air Force Facilities Air Force Research Laboratories Crystals Detection Detectors Films Filters Hyperspectral Imagery Liquid Crystals Materials Mirrors Optics Phase Shift Refraction Refractive Index Thin Films