OPTICAL COMPONENT, INFRARED CAMERA, AND METHOD FOR MANUFACTURING OPTICAL COMPONENT

摘要

The invention provides an optical component, an infrared camera including the optical component, and a method for manufacturing the optical component. Antireflection materials 3A are formed on a chalcogenide glass 2 of which a compositional ratio of germanium and selenium is 60 percent or greater. With respect to the antireflection materials 3A, an extinction coefficient to light of 10.5 μm is 0.01 or less, and a refractive index to light having a wavelength of 10.5 μm are greater than 1 and 2.6 or less. The antireflection materials 3A are formed on a surface of a chalcogenide glass 2 at an interval of 0.5 μm to 2.0 μm, so as to form an antireflection film 3. Adhesiveness of the antireflection film 3 is higher than that In a case where the surface of the chalcogenide glass 2 is evenly coated with the antireflection materials 3A.

主权项

1. An optical component, comprising:
a chalcogenide glass with a content ratio of germanium and selenium is 60 percent or greater; and an antireflection film in which a plurality of antireflection materials including diamond-like carbon particles or carbon particles, of which an extinction coefficient to light having a wavelength of 10.5 μm is 0.01 or less, and a refractive index to light having a wavelength of 10.5 μm is greater than 1 and 2.6 or less are formed on a surface of the chalcogenide glass at a regular interval of 0.5 μm to 2.0 μm along the surface, wherein the plurality of antireflection materials have same size and same shape with each other, an air layer is formed between the plurality of antireflection materials, and an equivalent refractive index of the antireflection film to light having a wavelength of 10.5 μm is 1.4 to 1.9 that is determined by an area ratio of the antireflection material occupying in a unit area of the antireflection film, is obtained by the antireflection materials and the air layer.