Infrared filter manufacturing capability depends on substrate processing, coating deposition method, and spectral verification under real-use AOI conditions. Germanium, silicon, zinc selenide and sapphire cover different infrared transmission ranges and require different coating and polishing approaches. Interference filters shift toward shorter wavelengths as AOI increases,…

An infrared lens manufacturer should do more than machine a lens from an infrared-transparent material. The manufacturer must translate the complete system requirement—including wavelength band, detector, focal geometry, substrate, coating, operating environment and inspection criteria—into a manufacturable optical component. For custom IR projects, specifying only…