Optical Information Device and Optical Information Processing Method

摘要

An optical information device and an optical information processing method which can perform high-speed and accurate positioning are provided. An optical information device which reproduces information from and/or records information on an optical information recording medium on which interference patterns between signal light and reference light are recorded as a hologram includes: an optical system which emits an optical beam; an aperture unit which passes at least a portion of reproduced light acquired when the optical beam from the optical system is radiated onto the optical information recording medium; a first detection unit which detects at least a portion of the reproduced light; a second detection unit which detects the position of the aperture unit; and a control unit which, based on a first signal acquired from the first detection unit and a second signal acquired from the second detection unit, controls the position of the aperture unit.

主权项

1. An optical information device for reproducing information from and/or recording information on an optical information recording medium on which an interference pattern of signal light and reference light is recorded as a hologram, comprising:
an optical system that emits a light beam; an aperture portion that causes at least a part of reproduced light obtained when the light beam from the optical system is radiated onto the optical information recording medium to pass therethrough; a first detection unit that detects at least a part of the reproduced light; a second detection unit that detects a position of the aperture portion; and a control unit that controls the position of the aperture portion based on a first signal obtained from the first detection unit and a second signal obtained from the second detection unit wherein the control unit switches a control state of the aperture portion by switching the first signal and the second signal.