METHOD OF DEPOSITING ANTIREFLECTION MULTILAYER BROADBAND COATING ON SURFACE OF OPTICAL GLASS Russian patent published in 2016 - IPC C03C17/34 B08B11/04 G02B1/11 

FIELD: glass.

SUBSTANCE: invention relates to antireflection coatings on optical glass. Method of depositing an antireflection multilayer broadband coating on surface of optical glass involves calculation of thickness of coating layers based on table values of refraction indices; cleaning glass surface with organic solvents, cleaning with glow discharge and thermal treatment of substrate; calcination and degassing of film-forming materials; application of materials of different-thickness layers in a vacuum installation and control of transmission coefficient of substrate based on witness sample. Layers are made from alternating materials with average and high refraction index, and outer layer is made of material with lowest refraction index. On each layer, spectrum scanning determination of refraction index and dependance thereof on wave length is performed using acousto-optical spectrophotometer and a computer connected to its output. Obtained dependence is compared with preset dependance and coating sputtering modes are adjusted.

EFFECT: technical result of invention is low coefficient of reflection from glass surface and high mechanical strength of antireflective coating.

1 cl, 4 dwg