METHOD OF PRODUCING THIN-FILM LIGHT-REFLECTING ELEMENT FOR OPTICAL SYSTEMS Russian patent published in 2014 - IPC C25D1/06 G02B6/132 

FIELD: physics.

SUBSTANCE: method includes preliminary chemical-mechanical treatment of the surface of irregularly shaped components and forming a metal-coated reflecting layer after the preliminary chemical-mechanical treatment, successively depositing a chemical zinc sublayer and a nickel-phosphorus layer with thickness of up to 200 mcm, which is polished to 6-8 E to obtain a duplicated matrix surface which is passivated in potassium dichromate solution and forming a reflecting gold layer in a citrate electrolyte of the following composition, g/l: potassium dicyano-(1)aurate 8-12 (on Au), potassium citrate 30-80, citric acid 15-40, with current density of 0.5 A/dm², temperature 55-60°C for 15-20 minutes, and a galvanic nickel bearing layer, after which the obtained metal-coated replica is removed from the matrix by thermal shock to form a thin-film light-reflecting element for subsequent installation into an optical system.

EFFECT: improved optical and geometrical properties and mechanical strength of the metal-coated reflecting layer.

1 ex, 1 dwg