Optical system having optical thin film including amorphous silicon oxide-based binder
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United States of America Patent
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Mar 13, 2018
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Aug 24, 2015
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Sep 16, 2004
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Abstract
An MgF2 optical thin film is formed on an optical surface of a base material. The MgF2 optical thin film includes MgF2 particles and an amorphous silicon oxide-based binder which exists on the surfaces of the MgF2 particles and between the MgF2 particles. Owing to this amorphous silicon oxide-based binder, the optical thin film can have high mechanical strength and high adhesion to the base material, while having excellent environment resistance and a lower refractive index.
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