LENSES AND OPTICS
Very long wavelength infrared filters
27 April 2012
Thin film optical coatings manufacturer Deposition Sciences has announced a new line of very long wavelength infrared (VLWIR) filters.
The filters provide high transmittance over the 12µm to beyond the 22µm wavelength region. Utilising DSI’s high precision physical vapour deposition (PVD) process, these robust coatings readily pass all environmental tests and can be repeatedly cycled between ambient and cryogenic temperatures, without degradation.
DSI’s line of very long wavelength IR optical coatings are available in narrow and wide bandpass filters, long and shortwave pass filters, and antireflection coatings. VLWIR coatings can be applied to a variety of substrates, including germanium, zinc selenide, silicon, and indium antimonide. Edge placement, transmission blocking ranges and levels, and operating temperatures and angles can all be customised per specifications.