Hologram, detection device, and method for verifying authenticity of hologram
AssigneeToppan Printing Co., Ltd.
InventorsSoko Koda, Akihito Kagotani, Tomoyuki Shirasaki, Noriko Harashima
Life of this patent
Estimating the term…
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, wherein
- the image to be reconstructed by the optical phase modulation structure is reconstructed from a plurality of pieces of point information that constitutes dot-like images, and
- each item of point information is positioned at a predetermined distance from the second interface.
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, wherein, when the reference light emitted from the point light source enters through the second interface, part of the image to be reconstructed by the optical phase modulation structure is reconstructed as second information on a side of the second interface opposite to that facing the point light source.
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, wherein
- the first information is reconstructed on a first surface positioned on the point light source side of the second interface, and
- when the reference light emitted from the point light source enters through the second interface, part of the image to be reconstructed by the optical phase modulation structure is reconstructed as third information on the point light source side relative to the second interface and on a second surface that is in proximity to the first surface.
Dependencies are inferred from the claim text.