Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1991-12-19
1994-02-22
Dzierzynski, Paul M.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 4412, 385132, 385 42, G02B 600
Patent
active
052894541
ABSTRACT:
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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Mohapatra Sarat K.
Tait William C.
Dunn Drew A.
Dzierzynski Paul M.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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