Infrared laser optical element and manufacturing method therefor

摘要

The present invention provides an infrared laser optical element, in which a dense optical thin film with a low laser absorption and high moisture resistance is formed on the surface thereof, and a manufacturing method for the same. In this infrared laser optical element, the main surface of the optical substrate (200) is smoothed, a BaF2 (210) film formed on said main surface thereof and then a ZnSe film (220) formed on said BaF2 film. The smoothing treatment for the main surface of the optical substrate is carried out by irradiating Xe gas ion beams (501). The BaF2 and the ZnSe films formed on said BaF2 film are formed on the main surface of the optical substrate, which has been smoothed, by Xe gas ion assisted vapor deposition. Superior performance can be achieved if the series of treatments are carried out under the specified conditions. <IMAGE>