Fabrication of lens rasters using a laser beam scanning method

Abstract

A cylindrical lens raster array is drawn on a dichromatic gelatine layer by hardening with a scanning laser beam. The thicknesses of the gelatine layer used for the array range from 40 to 80 mu m. The laser beam intensity profile is modified by a mask with a specific transparency function to fabricate the desired lens profile. This method is used to produce lens rasters which can be used as 3-dimensional image projection screens and anamorphosers.