Measuring apparatus for determinate absorption of the thin-film coatings by the photothermal method

摘要

The optical elements of high-power lasers and lasers systems must have the limiting low absorption so as heat that appears at the absorption produces the thermal deformations of the surfaces of the optical elements; change the spatial, energy and spectral parameters of emission and destruction of the optics.rnThe problems that are connected with production of the high-quality laser optics expect to the creation of the highly sensitive nondestructive testing methods of absorption in the optical elements, to low the absorpton of the thin-film coatings.