Process for producing non-glare Fresnel lenses from acrylic and other transparent materials which can be deformed by press-moulding or injection-moulding

摘要

The main feature of the process is characterised by roughening of the prism flanks in the shaping female mould, which is provided with the cast profile and on which pigments of a dispersion or solution are deposited by measures according to the invention, while the light-refracting prism surfaces remain highly transparent.