In this paper

the optical absorption in reflectance multilayer coatings has been studied. The simulating expressions of interface absorption coefficients of coatings are obtained. The transient temperature distribution

optical distortion and damage mechanism resulting in an annular high power continuous wave (CW) laser radiation have been studied in detail. Thermal distortion of optical components under CW Oxygen Iodine Laser (COIL) radiation has been measured by Twyman-Green interferometer

The results of the comparison of the experimental results to the theoretical results show that experimental results are consistent with theoretical results.