METHOD OF PRODUCING LIGHT-REFLECTING ELEMENT WORKPIECE FOR OPTICAL SYSTEMS Russian patent published in 2015 - IPC G02B5/08 G02B5/12 C23C14/02 C23C14/06 C23C14/34 

FIELD: physics.

SUBSTANCE: invention relates to a method of making a workpiece of a light-reflecting element for optical systems, which includes preliminary chemical-mechanical treatment of the surface of irregularly shaped components, and forming a metal-coated reflecting layer. Formation of the metal-coated light-reflecting layer on an iridium base is carried out after removing the replica, after successively depositing a chemical zinc sublayer, a nickel-phosphorus layer with thickness of up to 200 mcm, which is subjected to heat treatment at 110-400°C and high-intensity polishing to 6-8 E to obtain a duplicated matrix surface, followed by formation of a bearing layer of galvanic nickel from a sulphamic electrolyte of the following composition (g/l): sulphamic nickel 300-400; nickel dichloride 12-15; boric acid 25-40; sodium lauryl sulphate 0.01-0.1; saccharine 0.008 with current density of 2.5 A/dm², temperature of 55-60°C for 8 hours, followed by removing the obtained metal-coated replica from the matrix by thermal shock, and depositing the light-reflecting iridium layer by high-precision cathode sputtering on the inner surface of the nickel replica to form a thin-wall light-reflecting element for subsequent installation into an optical system.

EFFECT: improved optical and geometric properties, adhesion of the nickel-phosphorus coating to the matrix and mechanical strength thereof.

1 ex, 1 dwg