OPTICAL DIFFRACTION ELEMENT OF REFRACTIVE-INDEX MODULATED TYPE AND PROJECTOR INCLUDING THE SAME

A optical diffraction element of a refractive-index-modulated type includes a transparent DLC film formed on a transparent substrate, wherein the DLC film is subjected to refractive-index modulation so as to include a plurality of relatively-high-refractive-index regions and a plurality of relativel...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUURA, TAKASHI, USHIRO, TOSHIHIKO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	A optical diffraction element of a refractive-index-modulated type includes a transparent DLC film formed on a transparent substrate, wherein the DLC film is subjected to refractive-index modulation so as to include a plurality of relatively-high-refractive-index regions and a plurality of relatively-low-refractive-index regions for causing diffraction of light, and the refractive-index modulation causes diffraction effect so as to convert an intensity distribution in a cross section of a light beam applied to the DLC film into a uniform intensity distribution on a prescribed illumination surface.