HOLOGRAPHIC GRATING MANUFACTURING PROCESS Russian patent published in 2001 - IPC

FIELD: holography; holographic protection of commodities and securities; optical instrumentation and laser engineering, optoelectronics. SUBSTANCE: process includes deposition of adhesive layer and chalcogenide-glass resistive layer onto substrate under vacuum, its exposure to coherent laser beams, selective etching in ethylenediamine-containing solution, and deposition of reflecting coat; chalcogenide-glass coat is of triple system As₄₀S_60-xSe_x, where 20 ≤ x ≤ 40; this coat is treated upon deposition with silicate etching agent that contains, in addition, acetone, glycerin, and dimethyl sulfoxide, proportion of ingredients being as follows, volume percent: ethylenediamine - 5-30; acetone - 55-90; glycerin - 2-8; dimethyl sulfoxide - the rest. EFFECT: facilitated production process, improved quality of product. 1 dwg, 3 tbl, 3 ex