Optical disc addressing devices, a method of use thereof

Details Optical disc addressing devices, a method of use thereof Optical disc addressing devices, a method of use thereof

G - Physics

11

B

G11B 7/135 (2006.01) G11B 7/09 (2006.01) G11B 7/12 (2006.01) G11B 7/14 (2006.01)

Patent

CA 2123876

2123876 9312521 PCTABS00023 A method reading an optical disc such that a light beam is launched from a laser diode into an array of waveguides that are serially demultiplexed or addressed in parallel onto a multiplicity of data tracks, such that the number of data points read, simultaneously or sequentially across the width of the disc are limited by the rotational speed of the optical disc, and an optical head using an array of waveguides for the optical guidance of the light beam, such that the array of waveguides is disposed on a substrate and wherein the light beam can be switched by a switching means between separate channels in the array by means of an applied potential; an error tracking channel, such that when the error tracking channel detects the misalignment of the optical head, a signal generated from the error tracking channel causes the optical head to realign; and optionally, a dump channel, such that light directed into the dump channel is directly radiated into the substrate, or through the dump channel and then into the substrate.

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