DIFFRACTION OPTICAL ELEMENT, DIE FOR MOLDING DIFFRACTION OPTICAL ELEMENT, AND METHOD OF MANUFACTURING DIE FOR MOLDING DIFFRACTION OPTCIAL ELEMENT

DIFFRACTION OPTICAL ELEMENT, DIE FOR MOLDING DIFFRACTION OPTICAL ELEMENT, AND METHOD OF MANUFACTURING DIE FOR MOLDING DIFFRACTION OPTCIAL ELEMENT

PROBLEM TO BE SOLVED: To suppress reduction in optical characteristic of a diffraction optical element by reducing harmful light. SOLUTION: In the diffraction optical element 22, of a plurality of diffraction gratings 17', 18', etc., diffraction gratings 18', 19', etc. having gro...

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Bibliographische Detailangaben
Hauptverfasser: KAMIKITA MASAHIRO, IDE HIDEKI, KOIKE EIJIRO
Format: Patent
Sprache:eng
Schlagworte:
BORING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PERFORMING OPERATIONS
PHYSICS
TRANSPORTING
TURNING
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Zusammenfassung:PROBLEM TO BE SOLVED: To suppress reduction in optical characteristic of a diffraction optical element by reducing harmful light. SOLUTION: In the diffraction optical element 22, of a plurality of diffraction gratings 17', 18', etc., diffraction gratings 18', 19', etc. having groove apexes of a predetermined angle or less include chamfered surfaces 18c', 19c', etc. sloped to slopes 18a', 19a', etc. , which are formed on the lower end side of the inclined surfaces 18a', 19a', etc. COPYRIGHT: (C)2009,JPO&INPIT