PROBLEM OF FIXED FILTER DEVELOPMENT FOR TUNING PRUPOSES Open PDF Document Details Document Type Technical Report Publication Date Jul 01, 1953 Accession Number AD0020147 Entities People Norman Hapgood Robert O'b. Carpenter Stanley J. Sage Tags Communities of Interest Air Platforms Energy and Power Technologies DTIC Thesaurus Topics Accuracy Analyzers Contracts Detectors Electron Tubes Electronic Equipment Equations Fabry Perot Interferometers Filters High Resolution Measurement Measuring Instruments Optical Detectors Polarization Polarizers Refractive Index Waveplates