| 摘要 |
A hologram comprising a diffraction grating film with an interference fringe recorded thereon, a substrate provided on one side of said diffraction grating film, and cover plates provided on the surfaces of the aforesaid diffraction grating film by use of an adhesive, wherein the lateral face portion of the aforesaid hologram is covered with a water repellent layer, or a hologram comprising a diffraction grating film with an interference fringe recorded thereon and a substrate provided on one side of said diffraction grating film, the surface of the aforesaid diffraction grating film being covered with an adhesive, wherein the aforesaid adhesive contains an epoxy resin mixture consisting of an alicyclic epoxy and novolak type epoxy and an alicyclic acid anhydride type curing agent, a chief ingredient composed of an aromatic epoxy resin(s) and a curing agent comprising a mixture of an alicyclic amine and an aliphatic amine, or a chief ingredient composed of an aromatic epoxy resin(s) and a curing agent comprising a mixture of an alicyclic amine and an aromatic amine.
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