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Fred Thomas Fred Thomas
Fred C Thomas, Don W Wallentine, James Bero, Scott Wilson: Steering laser beam while etching optical servo tracks for magnetic disks. Iomega Corporation, Woodcock Washburn Kurtz Mackiewicz & Norris, February 1, 1994: US05283773 (26 worldwide citation)

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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Fred Thomas Fred Thomas
Thomas Fred Charles, Wallentine Don W, Bero James, Wilson Scott: Steering laser beam while etching optical servo tracks for magnetic disks. Minnesota Mining And Manufacturing Company, KURTZ Richard E, December 23, 1993: WO/1993/026007

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.