Image recording medium, hologram replicating device and hologram replicating method
AssigneeSony Corporation
InventorsNobuhiro Kihara, Akira Shirakura
Life of this patent
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Abstract
An image recording medium in which a refractive index modulation is recorded in a material in a layer such that, when the hologram recording medium is illuminated from a predetermined angle and a viewpoint is moved horizontally with respect to a normal line, a hologram image having continuous parallax in at least the horizontal direction is reproduced and that, when the viewpoint is moved in a direction with respect to the normal line different from the horizontal direction, another image that is different from and thus is not continuous with the hologram image is reproduced.
Claims20
An image recording medium in which a refractive index modulation is recorded in a material in a layer such that, when the hologram recording medium is illuminated from a predetermined angle and a viewpoint is moved horizontally with respect to a normal line, a hologram image having continuous parallax in at least the horizontal direction is reproduced and that, when the viewpoint is moved in a direction with respect to the normal line different from the horizontal direction, another image that is different from and thus is not continuous with the hologram image is reproduced.
A hologram replicating device, comprising:
- a hologram recording medium which includes a photosensitive material;
- a hologram master which is brought into close contact with a surface of the hologram recording medium directly or with a refractive index adjustor therebetween;
- a spatial light modulation element which modulates a laser beam in accordance with additional information;
- and
- an image formation optical system which irradiates the hologram recording medium with light modulated by the spatial light modulation element,
- wherein an image of the hologram master and the additional information are recorded by simultaneously irradiating the hologram recording medium with reference light and the modulated light.
A hologram replicating device, comprising:
- a hologram recording medium which includes a photosensitive material;
- a hologram master which is brought into close contact with a surface of the hologram recording medium directly or with a refractive index adjustor therebetween;
- a laser beam forming section which generates reference light for replication and at least first and second laser beams through branching;
- a first spatial light modulation element and a second spatial light modulation element which modulate the first and the second laser beams in accordance with first and second additional information, respectively;
- and
- a first image formation optical system and a second image formation optical system which irradiate the hologram recording medium with first and second light which are modulated by the first and the second spatial light modulation elements, respectively,
- wherein:
- the hologram recording medium is irradiated with the modulated first light and the modulated second light simultaneously with the reference light for replication at different incidence angles;
- and
- an image of the hologram master and the first and the second additional information are recorded on the hologram recording medium.
A hologram replication device, comprising:
- a first recording section which brings a hologram master which into close contact with a surface of a hologram recording medium directly or with a refractive index adjustor therebetween and records a hologram in the hologram master on the hologram recording medium by using reference light for replication, the hologram recording medium including a photosensitive material;
- a second recording section which modulates a laser beam in accordance with additional information by using a spatial light modulation element, irradiates the hologram recording medium with the modulated light via an image formation optical system and records the additional information in the hologram recording medium;
- and
- a fixation section which fixes the recorded photosensitive material,
- wherein the second recording section is disposed upstream or downstream of the first recording section and upstream of the fixation section.
A method of replicating a hologram, comprising the steps of:
- bringing a hologram master into close contact with a surface of a hologram recording medium directly or with a refractive index adjustor therebetween, the hologram recording medium including a photosensitive material;
- modulating a laser beam in accordance with additional information by using a spatial light modulation element;
- irradiating the hologram recording medium with the modulated light simultaneously with reference light for replication via an image formation optical system;
- and
- recording object light from the hologram master and the additional information in the hologram recording medium.
A method of replicating a hologram, comprising the steps of:
- generating at least a first laser beam and a second laser beams through branching;
- modulating the first laser beam and the second laser beams in accordance with first and second additional information by using a first spatial light modulation element and a second spatial light modulation element, respectively;
- irradiating the hologram recording medium with the modulated first light and the modulated second light simultaneously with reference light for replication at different incidence angles;
- and
- recording an image in a hologram master and the first and the second additional information in the hologram recording medium.
A method of replicating a hologram, comprising the steps of:
- first recording in which a hologram master is brought into close contact with a surface of a hologram recording medium directly or with a refractive index adjustor therebetween and a hologram in the hologram master is recorded in the hologram recording medium by using reference light for replication, the hologram recording medium including a photosensitive material;
- second recording in which a laser beam is modulated in accordance with additional information by using a spatial light modulation element, the hologram recording medium is irradiated with the modulated light via an image formation optical system and the additional information is recorded in the hologram recording medium;
- and
- fixing the recorded photosensitive material,
- wherein the second recording is conducted before or after the first recording and before the fixing.
Dependencies are inferred from the claim text.