Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-05-29
2007-05-29
Tran, Thang V. (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S047500, C347S253000
Reexamination Certificate
active
10447736
ABSTRACT:
An optical disc recording apparatus can draw an image by radially vibrating a laser beam under stable focus control. A pickup radiates the laser beam onto the optical disc rotated by a spindle motor. A focus servo controller maintains a constant spot diameter of the laser beam on the optical disc by detecting a return light of the laser beam reflected back from the optical disc. An irradiation position controller operates when the pickup opposes a label face of the optical disc for controlling an irradiation trajectory of the laser beam to vibrate in a radial direction of the optical disc while the laser beam runs along circumferential zones defined on a coloring layer of the label face. A modulating section modulates an intensity of the laser beam for forming dots along the circumferential zones so as to draw the image.
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LightScribe Direct Disc Labeling Announces New Licensees, XP-002321447, 2004 Hewlett-Packard Development Company, Jun. 2004.
Morito Morishima, et al., “Optical Recording Apparatus With Drawing Capabiltiy of Visible Image on Disk Face”, U.S. Appl. No. 10/282,671, filed Oct. 29, 2002.
“News Advisory: LightScribe Direct Disc Labeling Announces New Licensees, XP-002321447”, Hewlett-Packard Company, Jun. 28, 2004, http://www.lightscribe.com/doc/Email—blast—6—28—04.pdf>.
Pham Van T.
Tran Thang V.
Yamaha Corporation
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