These coatings reduce the reflection from the surface of an optic. They are used to increase the throughput of the optical system and to reduce ‘ghosting’ and parasitic back reflections in an optical system.
Covert filters transmit infrared (IR) wavelengths and reflect or absorb visible light. They allow an area to be illuminated with infrared light so it can be viewed with night vision equipment or IR cameras.
Coatings that operate beyond the visible spectrum, typically from 800 nm to 50 µm.
Coatings comprised of metals. Commonly deposited metals include, gold, silver, nickel, chrome, and aluminum.
MWIR bandpass filters with standard or self-blocking filter design for spectral sensing and imaging combine wide blocking and high passband transmittance in a single interference coating. They feature extreme stability in terrestrial and space environments.
A reflective optical device.
DSI’s very long wavelength infrared (VLWIR) filters provide high transmittance over the 12μm to beyond 22μm wavelength region. These coatings readily pass all standard environmental tests, and can be repeatedly cycled between ambient and cryogenic temperatures without degradation.