Method of producing volume hologram laminate

A method of producing a volume hologram laminate, wherein the following processes are sequentially carried out to a laminate obtained by partially coating and forming on a portion of a substrate a resin layer consisting of a resin selected from the group consisting of polymethyl methacrylate resin, a polyvinyl acetate resin, and a polyester resin and then overcoating the substrate and contacting the resin layer with a volume hologram recording material layer comprising a radically polymerizable monomer and a cationic polymerizable monomer;

• (1) a process of conducting an aging treatment to the laminate and transiting the polymerizable monomer of the volume hologram recording material layer to the resin layer by heating for 1 to 48 hours,
• (2) a hologram exposing process of exposing the laminate with laser from the substrate side, and
• (3) a hologram fixing process of conducting a heating treatment for 5 to 120 minutes and followed by an ultraviolet exposure treatment to move the polymerizable monomer from the resin layer to the volume hologram recording material layer and fixing a hologram;
• wherein a volume hologram based on the polymerizable monomer transited from the adjacent volume hologram recording material layer is formed on the resin layer;
• and further
• wherein a regenerated-center wavelength of a part of the laminate provided with the resin layer is differentiated to a long-wavelength side when compared to a regenerated-center wavelength of a part of the laminate provided with no resin layer.

A method of producing a volume hologram laminate, wherein the following processes are sequentially carried out to a laminate obtained by partially coating and forming on a portion of a substrate a resin layer consisting of a resin selected from the group consisting of a polyvinyl butyral resin and a polyvinyl acetal resin and then overcoating the substrate and contacting the resin layer with a volume hologram recording material layer comprising a radically polymerizable monomer and a cationic polymerizable monomer;

• (1) a process of conducting an aging treatment to the laminate and transiting the polymerizable monomer of the volume hologram recording material layer to the resin layer by heating for 1 to 48 hours,
• (2) a hologram exposing process of exposing the laminate with laser from the substrate side, and
• (3) a hologram fixing process of conducting a heating treatment for 5 to 120 minutes and followed by an ultraviolet exposure treatment to move the polymerizable monomer from the volume hologram recording material layer to the resin layer and fixing a hologram;
• wherein a volume hologram based on the polymerizable monomer transited from the adjacent volume hologram recording material layer is formed on the resin layer;
• and further
• wherein a regenerated-center wavelength of a part of the laminate provided with the resin layer is differentiated to a short-wavelength side when compared to a regenerated-center wavelength of a part of the laminate provided with no resin layer.