| 摘要 |
FIELD: production processes. ^ SUBSTANCE: proposed method comprises fabricating Fresnel negative lens with square aperture by the diamond turning, jointing their faces into an assembly and making an intermediate panel by filling two-component silicon in between the said assembly and silicate glass, followed by silicon polymerisation. The said intermediate panel is separated from the assembly and duplicated onto the polyurethane matrix via polymerisation of two-component polyurethane in space between the said intermediate panel and sheet material. The matrix is separated, fixed on a solid base and filled with two-component silicon compound with its layer thickness exceeding the Fresnel lens profile cavity height by 0.1 mm or more. The silicate glass with primer is placed above it and excess silicon mix is squeesed out to make the thickness no less than 0.1 mm. The silicon mix is polymerized and the glass with lens panel is bent out from polyurethane matrix to be detached. ^ EFFECT: higher efficiency and lower costs, higher quality. ^ 7 cl, 2 dwg |
