Preparation of sol-gel three-wavelength antireflective film

Based on simulation and experiment, the way to get three-wavelength antireflective film was researched, A synthesis procedure of SiO₂ colloid derived from acid-alkali 2-step catalyzed hydrolysis was disclosed. Two sols were compounded and the three-wavelength antireflective films with transmittances of 351 nm, 527 nm and 1053 nm by over 99.5%, 98% and 98%, were prepared. The properties of the coatings were characterized with TEM, AFM, spectroscopic ellipsometry and spectrophotometer. Three-wavelength antireflective coating on the running performance of high power laser device lifting played a positive role in promoting. (authors)