FIELD: making of diffraction grating on aluminium layer. SUBSTANCE: strokes were applied by diamond cutter in aluminium layer which is covered preliminary with lubricant-cooling liquid containing the following components, vol.%: ethanol 38-42; glycerol 38-42; surface-active substance ОП-10 0.5-1.0, and ethylene glycol 18-22. Aluminium layers were applied on the grating backing by evaporation under vacuum. EFFECT: enhanced quality of liquid used. 2 tbl
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