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US 6,483,611 B1Granted
Hologram and process for producing hologram
AssigneeDenso Corporation
InventorsYasuhiro Mizutani, Hidekazu Hattori, Satoru Kadowaki, Kazutaka Suzuki
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AssigneeDenso Corporation
InventorsYasuhiro Mizutani, Hidekazu Hattori, Satoru Kadowaki, Kazutaka Suzuki
Estimating the term…
There is provided a hologram with excellent heat resistance. The hologram comprises a hologram film (10) in which a diffraction grating has been recorder, a substrated (11) situated on one side of the hologram film (10) via a bonding material (13), and a polymer film (12) situated on the other side of the hologram film (10) via a bonding material (13), wherein the thickness of the polymer film (12) is no greater than 100 μm. Otherwise, the polymer film (12) is subjected to prior heat treatment. There is further provided a production process for holograms with minimal appearance defects. The process comprises preparing a photopolymer (210) coated onto a substrate (211) and affixing the photopolymer surface (301) onto a photographed object original (213), exposing it to laser light to converting it into a hologram (201), then releasing the hologram (201) from the photographed object original (213) to expose the hologram surface (302) and finally affixing a protective film (215) onto the hologram surface (302), such that the bonding strength A between the substrate (211) and the hologram (201) is greater than the bonding strenght B between the hologram (201) and the protective film (215).
A hologram comprising a hologram film in which a diffraction grating has been recorded, a substrate situated on one side of said hologram film via a bonding material, and a polymer film situated on the other side of said hologram film via a bonding material,
A hologram comprising a hologram film in which a diffraction grating has been recorded, a substrate situated on one side of said hologram film via a bonding material, and a polymer film situated on the other side of said hologram film via a bonding material,
A hologram comprising a hologram film in which a diffraction grating has been recorded, a first polymer film situated on one side of said hologram film via a bonding material, a substrate situated via a bonding material on the side of said first polymer film on which the hologram film is not situated, and a second polymer film situated on the other side of said hologram film via a bonding material,
A hologram comprising a hologram film in which a diffraction grating has been recorded, a first polymer film situated on one side of said hologram film via a bonding material, a substrate situated via a bonding material on the side of said first polymer film on which the hologram film is not situated, and a second polymer film situated on the other side of said hologram film via a bonding material,
A hologram comprising a hologram film in which a diffraction grating has been recorded, a substrate situated on one side of said hologram film via a bonding material, and a polymer film situated on the other side of said hologram film via a bonding material,
A hologram comprising a hologram film in which a diffraction grating has been recorded, a first polymer film situated on one side of said hologram film via a bonding material, a substrate situated via a bonding material on the side of said first polymer film on which the hologram film is not situated, and a second polymer film situated on the other side of said hologram film via a bonding material,
Dependencies are inferred from the claim text.