FABRICATION OF LENS RASTERS USING A LASER-BEAM SCANNING METHOD

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