Hologram recording medium, hologram recording device and method
AssigneeSony Corporation
InventorsKoji Ashizaki, Nobuhiro Kihara, Akira Shirakura
Life of this patent
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Abstract
A hologram recording medium (1) comprising a hologram recording layer (3) consisting of a photopolymer layer and formed on a substrate (2) consisting of a colorless, transparent resin film or the like, and a protection layer (4) consisting of a colorless, transparent resin film or the like and formed on the hologram recording layer (3), wherein the substrate (2) and the protection layer (4) are formed of a low-double-refraction material, and an optical axis of double refraction in the case of a strip-form medium is set to agree with a longer-side direction or a shorter-side direction thereof.
Claims7
(Amended) A recording medium for hologram comprising a hologram recording layer in which object light indicating a picture image to be recorded and reference light are irradiated so that hologram is recorded, and a base and a protective layer to put the hologram recording layer in between, wherein
- the recording medium for hologram has rectangular shape, and
- the base and the protective layer comprise material through which light is transmitted and in which an axial direction of double refraction is parallel or nearly parallel to either one side of the rectangular shape.
(Amended) A hologram producing apparatus comprising a supply unit for a recording medium for hologram, and an exposure unit for irradiating object light and reference light onto a recording medium for hologram supplied from the supply unit to record hologram, wherein
- the recording medium for hologram comprises a hologram recording layer on which hologram is recorded, and a base and a protective layer between which the hologram recording layer is put, and the recording medium for hologram is formed in rectangular shape,
- the base and the protective layer comprise material through which light is transmitted and in which an axial direction of that double refraction is parallel or nearly parallel to either one side of the rectangular shape, and
- the object light and the reference light that the exposure unit irradiates are linearly polarized light polarized in a direction equal or nearly equal to the axial direction of double refraction.
(Added) A method of preparing a recording medium for hologram comprising a hologram recording layer in which object light indicating a picture image to be recorded and reference light are irradiated so that hologram is recorded, and other layer laminated on the hologram recording layer, wherein
- a shape of the recording medium for hologram is configured to be rectangular, and
- the other layer comprises material through which light is transmitted, and in which an axial direction of double refraction is parallel or nearly parallel to either one side of the rectangular shape.
(Added) A hologram producing method of supplying a recording medium for hologram from a supply unit to irradiate object light and reference light onto the recording medium for hologram to thereby produce hologram, wherein
- the recording medium for hologram comprises a hologram recording layer on which hologram is recorded, and other layer laminated on the hologram recording layer, and is formed into a rectangular shape,
- the other layer comprises material through which light is irradiated and in which an axial direction of double refraction is parallel or nearly parallel to either one side of the rectangular shape, and
- linearly polarized light polarized in a direction equal or nearly equal to the axial direction of double refraction is used as the object light and the reference light.
Dependencies are inferred from the claim text.