Infrared transparent optical element and infrared imaging camera using the same

摘要

An infrared transparent optical element for use as an optical window for an infrared imaging camera includes an infrared transparent substrate, an antireflection film, and a protective film of a polymer material. The infrared transparent substrate has first and second major surfaces opposite each other, and the antireflection film is disposed on each of the first and second major surfaces of the substrate. The protective film is on an outer surface of the antireflection film on the first major surface of the substrate.