Hologram, detection device, and method for verifying authenticity of hologram
AssigneeToppan Printing Co., Ltd.
InventorsSoko KODA, Akihito KAGOTANI, Tomoyuki SHIRASAKI, Noriko HARASHIMA
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Abstract
A hologram that includes a formation layer and a reflection layer that are laminated. The formation layer has an optical phase modulation structure on a first interface in contact with the reflection layer. When reference light emitted from a point light source enters through a second interface different from the first interface of the formation layer, the entirety or part of an image to be reconstructed by the optical phase modulation structure is reconstructed as spatial information on the point light source side relative to the second interface.
Claims17
A hologram, comprising:
- a formation layer and a reflection layer that are laminated, wherein
- the formation layer has an optical phase modulation structure on a first interface which is in contact with the reflection layer, and,
- when reference light emitted from a point light source enters through a second interface different from the first interface of the formation layer, an entirety or part of an image to be reconstructed by the optical phase modulation structure is reconstructed as first information on the point light source side relative to the second interface.
Dependencies are inferred from the claim text.