Holographic recording and reconstructing apparatus and holographic recording and reconstructing method
AssigneeSony Corporation
InventorMitsuru Toishi
Life of this patent
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Abstract
A holographic recording and reconstructing apparatus includes a laser light source for emitting a laser beam, a beam splitting element for splitting the emitted laser beam into a signal beam and a reference beam, a light modulating element for modulating the signal beam, an optical system for collecting the modulated signal beam and the reference beam onto a reflection hologram recording medium at substantially the same location, a light detection element for detecting a reconstructed light beam from the hologram recording medium, and wavelength shifting means for shifting the wavelength of the laser beam used during reconstruction from the wavelength used during recording.
Claims9
A holographic recording and reconstructing apparatus, comprising:
- a laser light source for emitting a laser beam;
- a beam splitting element for splitting the emitted laser beam into a signal beam and a reference beam;
- a light modulating element for modulating the signal beam;
- an optical system for collecting the modulated signal beam and the reference beam onto a reflection hologram recording medium at substantially the same location;
- a light detection element for detecting a reconstructed light beam from the hologram recording medium;
- and
- wavelength shifting means for shifting the wavelength of the laser beam used during reconstruction from the wavelength used during recording by a shift amount Δλ.
A method for recording and reconstructing a hologram, comprising:
- emitting a laser beam from a laser light source;
- splitting the emitted laser beam into a signal beam and a reference beam;
- modulating the signal beam;
- collecting the modulated signal beam and the reference beam onto a reflection hologram recording medium at substantially the same location;
- detecting a reconstructed light beam from the hologram recording medium;
- and
- shifting the wavelength of the laser beam used during reconstruction from the wavelength used during recording by a shift amount Δλ.
A holographic recording and reconstructing apparatus, comprising:
- a laser light source configured to emit a laser beam;
- a beam splitting element configured to split the emitted laser beam into a signal beam and a reference beam;
- a light modulating element configured to modulate the signal beam;
- an optical system configured to collect the modulated signal beam and the reference beam onto a reflection hologram recording medium at substantially the same location;
- a light detection element configured to detect a reconstructed light beam from the hologram recording medium;
- and
- a wavelength shifting unit configured to shift the wavelength of the laser beam used during reconstruction from the wavelength used during recording by a shift mount Δλ.
Dependencies are inferred from the claim text.