Method and equipment for storing holographic data
AssigneeKabushiki Kaisha Toshiba
InventorsKazuki Matsumoto, Akiko Hirao, Rumiko Hayase
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Abstract
A method for storing holographic data in a medium having a reflection layer and a recording layer comprises: recording, rotating and repeating. An interference pattern is recorded at a recording position of the recording layer of the medium in a stationary state. The interference pattern is formed by an interference between an object beam and a reference beam which are irradiated into the recording layer from an opposite side of the reflection layer. The medium is rotated so as to shift the recording position by a distance of n×Sh where n is a positive integer and Sh is a predetermined recording shift amount. The recording and the rotating are repeated alternately.
Claims20
A method for storing holographic data in a medium having a reflection layer and a recording layer, comprising:
- recording an interference pattern at a recording position of the recording layer of the medium in a stationary state, the interference pattern being formed by an interference between an object beam and a reference beam, the object beam and the reference beams being irradiated into the recording position of the recording layer from an opposite side of the reflection layer;
- rotating the medium so as to shift the recording position by a distance of n×Sh where n is a positive integer and Sh is a predetermined recording shift amount;
- and
- repeating the recording and the rotating alternately.
An equipment for storing holographic data comprising:
- a light irradiating unit which records an interference pattern at a recording position of a recording layer of a recording medium having a reflection layer and the recording layer by irradiating an object beam and a reference beam into the recording position of the recording medium from an opposite side of the reflection layer,
- an intermittent driving unit which rotates the recording medium intermittently so as to shift the recording position by a distance of n×Sh where n is a positive integer and Sh is a predetermined recording shift mount;
- and
- a control unit which controls the light irradiating unit and the intermittent driving unit so that the recording by the light irradiating unit and the rotation by the intermittent driving unit are executed alternately.
Dependencies are inferred from the claim text.