METHOD OF MANUFACTURING LIGHT-ABSORBING ELEMENTS OF OPTICAL SYSTEMS ON TITANIUM SUBSTRATES Russian patent published in 2018 - IPC G02B1/00 

FIELD: optics.

SUBSTANCE: use: production of light-absorbing multilayer products for manufacturing light-absorbing elements of optical devices – electronic devices and optical systems (mirrors) of space vehicles. In the method for fabricating light-absorbing elements of optical systems on titanium substrates, including preliminary preparation of titanium substrates, degreasing and washing, subsequent etching in a solution of mineral compounds, coating of the target coating according to the invention, degreasing is carried out in a solution of a mixture of trisodium phosphate concentration of 35–40 g/l and calcined soda concentration of 35–40 g/l, at room temperature for 10–15 minutes, the etching operation is carried out in a mixture of hydrochloric solutions of 15–25 g/l and a hydrofluoric 10–15 g/l of mineral acids for 1–2 minutes, then clarify the surface of the titanium substrate by treatment with a solution of nitric acid 400–900 g/l at room temperature for 25–30 seconds, then the surface of the titanium substrate is activated in a hydrochloric acid solution of 380–400 g/l at room temperature for 5–10 seconds, then treatment is carried out in ethylene glycol for 10–15 seconds, then the zinc treatment is carried out in a solution of a certain composition, then the obtained zinc film is removed by treatment in a solution of nitric acid 400–900 g/l; after re-treatment in ethylene glycol and zincate treatment in said zinc solution, chemical nickel plating is carried out, and the desired complex chromium-containing coating is obtained by galvanic chrome plating, all chemical treatment and coating operations alternate with rinsing in running water and the final products are removed from the electrolytic bath, washed and dried outdoors at room temperature.

EFFECT: development of a method for obtaining light-absorbing elements of optical systems that provides production of optical elements with a given degree of light-absorbing properties of the formed coated, as well as obtaining a coating, in operation of which the volume of gas evolution is minimal.

1 cl, 1 dwg