Process for preparing blazed holograms
AssigneeSharp Kabushiki Kaisha
InventorsKatsuhiro Kubo, Keiji Sakai, Yukio Kurata, Hideyoshi Yamaoka
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Abstract
A process for preparing blazed holograms suitable for mass-production which includes fabricating a glass or metal plate having a surface of serrated cross section, disposing the glass or metal plate in an injection mold to allow the surface of serrated cross section to constitute an inner surface of the mold. Then injecting an acrylic resin in molten form into the mold under a specific molding pressure, and removing a molded acrylic resin from the glass plate or metal plate to obtain an acrylic blazed hologram.
Claims11
A process for preparing blazed holograms which comprises fabricating a glass or metal plate having a surface of serrated cross section corresponding to a desired blazed grating pattern, disposing the glass or metal plate in an injection mold to allow the surface of serrated cross section to constitute an inner surface of the mold, injecting an acrylic resin in molten form into the mold under molding pressure of 1500 kgf/cm.sup.2 or more and removing a molded acrylic resin from the glass or metal plate to obtain an acrylic blazed hologram.
Dependencies are inferred from the claim text.