Dual color anti-reflection coating
Dual field of view afocal
Dual field-of-view objects system for the infrared
Dual titanium nitride layers for solar control
Dual waveband optical system
Dual-band millimeter-wave and infrared anti-reflecting coatings
Dual-band, dual-focal-length, relayed refractive imager
Durable corrosion and ultraviolet-resistant silver mirror
Durable low-emissivity solar control thin film coating
Durable optical elements fabricated from free standing polycryst
DUV-capable microscope objective with parfocal IR focus
Dye combinations for multiple bandpass filters for video...
Dye-based filter