Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2008-03-13
2010-12-28
Hindi, Nabil Z (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
Reexamination Certificate
active
07859974
ABSTRACT:
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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Chinese Office Action for 200810212353.2 mailed on Apr. 13, 2010.
Tatsuta Shinichi
Yamamoto Yuichiro
Hindi Nabil Z
Kabushiki Kaisha Toshiba
Turocy & Watson LLP
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