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US 7,742,379 B2Granted
Optical recording method, optical recording apparatus, optical recording medium, and optical reproducing method
AssigneeFUJIFILM Corporation
InventorYoshihisa Usami
Life of this patent
Estimating the term…
Abstract
There are provided: an optical recording method containing a deviation detecting step, a horizontal location controlling step, and an interference image recording step; an optical recording apparatus containing a derivation detecting unit, a horizontal location controlling unit, and an interference image recording unit; an optical recording medium recorded in accordance with the optical recording method; and an optical reproducing method reproducing a recorded information recorded in accordance with the optical recording method.
Claims20
An optical recording method, comprising:
- applying at least one of information light for recording and reference light for recording to a location information pattern in an optical recording medium so as to detect a horizontal location of an optical axis of at least one of the information light for recording and the reference light for recording relative to the optical recording medium;
- detecting a deviation ΔL between the horizontal location of the optical axis of at least one of the information light for recording and the reference light for recording, and an address detected by servo light in a horizontal direction;
- in the case where the deviation ΔL is more than 0, shifting at least one of the information light for recording and the reference light for recording at ΔL in the horizontal direction so that a location of the optical axis of at least one of the information light for recording and the reference light for recording is matched to a location of the address;
- and
- applying the information light for recording and the reference light for recording to a recording layer of the optical recording medium so as to form an interference image, and recording the interference image on the recording layer,
- wherein the optical recording medium comprises the recording layer for a holographic recording, and the location information pattern which stores horizontal location information relative to a surface of the recording layer.
3 more elements
An optical recording apparatus, comprising:
- a deviation detecting unit which is configured to apply at least one of information light for recording and reference light for recording to a location information pattern in an optical recording medium so as to detect a horizontal location of an optical axis of at least one of the information light for recording and the reference light for recording relative to the optical recording medium, and is configured to detect a deviation ΔL between the horizontal location of the optical axis of at least one of the information light for recording and the reference light for recording and an address detected by servo light in a horizontal direction;
- a horizontal location controlling unit which is configured to control a horizontal location of the optical axes of the information light for recording and the reference light for recording based upon the detected derivation ΔL;
- and
- an interference image recording unit which is configured to apply the information light for recording and the reference light for recording to a recording layer of the optical recording medium at the location controlled by the horizontal location controlling unit so as to form an interference image, and is configured to record the interference image on the recording layer,
- wherein the optical recording medium comprises the recording layer for a holographic recording, and the location information pattern which stores horizontal location information relative to a surface of the recording layer.
2 more elements
An optical recording medium, comprising:
- a recording layer for a holographic recording;
- and
- a location information pattern which stores horizontal location information relative to a surface of the recording layer,
- wherein the recording layer records an interference image, which is recorded by a method comprising:
- applying at least one of information light for recording and reference light for recording to the location information pattern so as to detect a horizontal location of an optical axis of at least one of the information light for recording and the reference light for recording relative to the optical recording medium;
- detecting a deviation ΔL between the horizontal location of the optical axis of at least one of the information light for recording and the reference light for recording and an address detected by servo light in a horizontal direction;
- in the case where the deviation ΔL is more than 0, shifting at least one of the information light for recording and the reference light for recording at ΔL in the horizontal direction so that a location of the optical axis of at least one of the information light for recording and the reference light for recording is matched to a location of the address;
- and
- applying the information light for recording and the reference light for recording to the recording layer so as to form the interference image, and recording the interference image on the recording layer.
6 more elements
An optical reproducing method, comprising:
- applying reference light to an interference image recorded on a recording layer of an optical recording medium so as to reproduce recorded information corresponding to the interference image,
- wherein the optical recording medium comprises the recording layer, and a location information pattern which stores horizontal location information relative to a surface of the recording layer,
- wherein the interference image is recorded on the recording layer of the optical recording medium by a method comprising:
- applying at least one of information light for recording and reference light for recording to the location information pattern so as to detect a horizontal location of an optical axis of at least one of the information light for recording and the reference light for recording relative to the optical recording medium;
- detecting a deviation ΔL between the horizontal location of the optical axis of at least one of the information light for recording and the reference light for recording and an address detected by servo light in a horizontal direction;
- in the case where the deviation ΔL is more than 0, shifting at least one of the information light for recording and the reference light for recording at ΔL in the horizontal direction so that a location of the optical axis of at least one of the information light for recording and the reference light for recording is matched to a location of the address;
- and
- applying the information light for recording and the reference light for recording to the recording layer so as to form the interference image, and recording the interference image on the recording layer.
5 more elements
Dependencies are inferred from the claim text.