OPTICAL INFORMATION RECORDING/REPRODUCTION DEVICE AND ADJUSTMENT METHOD

摘要

The optical information recording/reproduction device for recording information by irradiating an optical information recording medium with signal light and reference light to form a hologram, and reproducing the information by irradiating the hologram with the reference light, wherein the optical information recording/reproduction device is provided with a branching element for branching laser light from a laser light source into signal light and reference light, a spatial light modulation unit for adding two-dimensional information to the signal light, an objective lens for irradiating an optical information recording medium with the signal light, a photodetector for detecting diffracted light from the optical information recording medium when irradiated with the reference light, and an optical axis adjustment unit disposed between the laser light source and the branching element, the optical axis adjustment unit adjusting the optical axis of the laser light.

主权项

1: An optical information recording/reproduction device that irradiates an optical information recording medium with signal light and reference light to form a hologram to record information, and irradiates the hologram of the optical information recording medium with the reference light to reproduce information, the optical information recording/reproduction device comprising:
a laser light source configured to emit laser light; a branching element configured to branch the laser light from the laser light source to the signal light and the reference light; a spatial light modulation unit for adding two-dimensional information to the signal light; an objective lens for irradiating the optical information recording medium with the signal light; a photodetector configured to detect diffracted light from the optical information recording medium when the optical information recording medium is irradiated with the reference light; an optical axis adjustment unit arranged between the laser light source and the branching element, and configured to adjust an optical axis of the laser light