TA-C COATING METHOD FOR PROTECTIVE LAYER OF INFRARED RAY OPTICAL LENS

摘要

The present invention relates to a tetrahedral amorphous carbon (ta-C) coating method for a protective film of an infrared ray optical lens and, more specifically, to a ta-C coating method for a protective film of an infrared ray optical lens, which can form a ta-C thin film with high hardness and excellent optical performance without a loss of an infrared ray penetration ratio as a single layer in an infrared ray optical lens. According to the present invention, the ta-C coating method for a protective film of an infrared ray optical lens comprises a coating step of forming a ta-C protective film in an infrared ray optical lens. The coating step forms a protective film by a vacuum arc evaporation method of a filtered cathodic vacuum arc way.