Steering laser beam while etching optical servo tracks for magne

Details Steering laser beam while etching optical servo tracks for magne Steering laser beam while etching optical servo tracks for magne

1992-06-10

1994-02-01

Pascal, Robert J.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

360 7703, 360 7705, 360 7711, 360 7814, 360135, 360131, 369 43, 369 14, G11B 2110, G11B 700

Patent

active

052837734

ABSTRACT:
A beam of light used to etch servo tracks on a magnetic disk is steered with an acousto-optical device to maintain the beam in concentrical patterns while mechanically moving the optics which generate the beam of light continuously radially of the disk.

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Y. Y. Fan and V. M. Huynh, "Investigation of Light Scattering From Rough Periodic Surfaces-Numbered Solutions", Dept. of Mech. Eng. Univ. of Windsor, Ontario, Mar. 1992.
J. Mazumder, "Overview of Melt Dynamics in Laser Processing", Optical Engin. vol. 30, No. 8, pp. 1208-1219 Aug. 1991.
M. W. Sasnett and T. F. Johnston, Jr., "Beam Characterization and Measurement of Propagation Attributes", Laser Beam Diagnostics, SPIE vol. 1414, Los Angeles 1991.
F. Jorgensen, "The Complete Handbook of Magnetic Recording" 3rd Edition, TAB Books, Inc., Blue Ridge Summit, Pa. 1988 pp. 119-121.

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