Application No./Patent No.: 2017100924018 Application date: February 20, 2017.
Inventor/Designer: Liu Wenwen, Cao Yu, Zhang Jian, Zhu Dehua.
The invention provides a post-processing method for improving the mechanical properties of optical elements bAsed on laser shock wave, which takes the mechanical properties R0, A0, B0 and H0 and laser damage resistance F0 and G0 of thin film elements without laser shock wave post-processing as a reference, and respectively obtains the influence laws of E0, Em and Delta E on the mechanical properties Rs, As, Bs and Hs and laser damage resistance Fs and Gs of samples treated by s times of laser shock wave; According to the improvement of mechanical properties and laser damage resistance, the initial laser energy E0, energy increasing gradient △E and maximum laser energy Em are optimized. When the mechanical properties and laser damage resistance of thin film elements are no longer improved and meet the requirements of experimental samples, the cycle is stopped to complete the post-treatment of mechanical properties of thin film elements. According to the invention, the mechanical properties of high-power optical thin film elements are improved, and the problem that the mechanical properties of the optical thin film elements such as adhesive force, film bonding force, residual stress and the like currently lack effective means to control is solved.
