YbF3 Infrared optical lens equipped with ytterbium fluoride thin film layer

摘要

The present invention relates to a far-infrared optical lens having a YbF_3 thin film layer and, more specifically, to a far-infrared optical lens having a YbF_3 thin film layer in which high transmittance and durability can be secured by applying a strong coating structure to a scratch while lowering an absorption rate of light by moisture when forming an antireflective coating on a surface of an infrared optical lens. According to the present invention of the far-infrared optical lens having the YbF_3 thin film layer, a strong coating film structure is applied to the scratch while lowering the absorption rate of light by moisture when forming the antireflective coating on the surface, thereby securing high transmittance and durability at the same time.