Rear projection screen and method for the production thereof

摘要

The present invention relates to rear-projection screens encompassing at least one light-scattering polymethyl methacrylate layer of thickness in the range from 0.05 to 4 mm comprising spherical particles whose size is in the range from 5 to 35 mum, at a concentration in the range from 2 to 60% by weight, based on the total weight of the light-scattering polymethyl methacrylate layer, the refractive index of the spherical plastics particles differing from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, wherein the concentration of the spherical plastics particles cp, the thickness of the light-scattering polymethyl methacrylate layer ds, and the size of the spherical plastics particles Dp is selected in such a way that the ratio cp*ds/Dp<3 >is in the range from 0.0015 to 0.015% by weight*mm/mum<3 >and the ratio of average surface roughness of the polymethyl methacrylate layer Ra to the size of the spherical plastics particles Dp is in the range from 0.05 to 0.4. A feature of the rear-projection screens is particularly high quality of the images projected onto the screens.