Hologram color filter, liquid crystal display device using the same, and fabrication process of hologram color filter

A fabrication process of a hologram color filter comprising the steps of:

• disposing converging unit holograms in an array wherein said converging unit holograms have an efficiency of diffraction independent, or less dependent, on wavelength and spectrally diffract light incident thereon into spectral components of different wavelength in order to emit said spectral components to a desired position at a predetermined spatial period;
• producing a computer-generated hologram having properties of said converging unit holograms;
• bringing said computer-generated hologram in contact with a photosensitive material or superposing said computer-generated hologram and said photosensitive material together with a gap therebetween;
• and
• illuminating said computer-generated hologram with coherent light such that light diffracted by said computer-generated hologram and undiffracted light propagated rectilinearly through said computer-generated hologram interfere with each other in said photosensitive material for reproducing a copied hologram from said computer-generated hologram.

A fabrication process of a hologram color filter comprising the steps of:

• disposing converging unit holograms in an array, wherein said converging unit holograms have an efficiency of diffraction independent, or less dependent, on wavelength and spectrally diffract light incident thereon into spectral components of different wavelength in order to emit said spectral components to a desired position at a predetermined spatial period;
• producing a relief computer-generated hologram having properties of said converging unit holograms;
• coating a photosetting resin on a relief surface of said relief computer-generated hologram;
• and
• irradiating said photosetting resin with light for copying said relief computer-generated hologram in the form of a relief hologram onto said photosensitive resin.