Technique of Making Quasi-edge Illuminated Rainbow Holograms

The technique and principle of making quasi-edgeilluminated rainbow holograms with high quality are introduced. The method of eliminating harmful interference patterns, which resulted from high reflections at interfaces of the recording plates, is described and the phenomenon that such holograms can reconstruct two images with high diffraction efficiency by transmission and reflection illuminations is analyzed in details. The experimental and application results are presented.