PSEUDOCOLORING FOR A DUAL-PHASE GRATING METHOD

A simple method for adjusting pseudocolor distributions of photographi c images is described and demonstrated experimentally. This method is based on the technique for photographic phase image pseudocolor modula ted by a grating. A reflecting ray path is introduced into a 4f system to produce diffraction of the dual-phase grating so that the pseudoco lor at the output plane can be adjusted. The merit of this method is t hat many pseudocolor images with different color distributions can be obtained for each diffraction order. (C) 1996 Society of Photo-Optical Instrumentation Engineers.