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Optical information recording/reproducing apparatus, diffraction-grating fabricating apparatus, optical information recording medium, and positioning control method
Optical information recording/reproducing apparatus, diffraction-grating fabricating apparatus, optical information recording medium, and positioning control method
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机译:光学信息记录/再现设备,衍射光栅制造设备,光学信息记录介质和定位控制方法
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摘要
An optical information recording/reproducing apparatus includes an optical mechanism that collects an information beam and a reference beam to an optical information recording medium that has a diffraction grating and an information recording layer by using interference fringes produced due to interference between the both beams which are converted from an irradiation beam for recording or reproduction and that guides a servo irradiation beam into the diffraction grating and causes the servo irradiation beam to be transmitted through the diffraction grating, a photodetector that detects a diffracted beam diffracted by the diffraction grating and transmitted therethrough, and an adjusting unit that controls a drive unit to adjust a position or an angle between the optical information recording medium and the optical mechanism based on the intensity of the detected diffracted beam.
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