1
Fred Thomas Fred Thomas
Fred C Thomas, Don W Wallentine, James Bero, Scott Wilson: Acousto-optical intensity control of laser beam during etching of optical servo information of magnetic media. Iomega Corporation, Woodcock Washburn Kurtz Mackiewicz & Norris, January 18, 1994: US05279775 (35 worldwide citation)

The intensity of a beam of light used to etch concentric servo tracks on a magnetic medium is adjusted with an acousto-optical device to maintain a substantially constant energy density delivered by the beam while the optics which generate the beam move radially of the disk.


2
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.


3
Fred Thomas Fred Thomas
Fred C Thomas, James Bero, Robert Short, Paul R Johnson: Apparatus for and method of verifying etching of optical servo information on magnetic media. Iomega Corporation, Woodcock Washburn Kurtz Mackiewicz & Norris, August 2, 1994: US05334849 (10 worldwide citation)

An apparatus and method for etching a point on the surface of a magnetic medium to reduce the reflectivity of the point and for verifying that proper etching occurred. A light source provides a collimated incident beam of light. The incident beam is focused to a point on the medium and a portion of ...


4
Fred Thomas Fred Thomas
Paul R Johnson, James Bero, Jeff G Carter, Anthony M Candia, George T Kieger, Ronald F Hales, Fred C Thomas III: Method of and apparatus for removing debris from the floptical medium. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Eric D Levinson, May 30, 1995: US05419733 (6 worldwide citation)

The current invention substantially removes particulate waste materials or debris from the floptical medium after laser etching. A low-temperature gas containing ice crystals is applied at a predetermined angle while the floptical medium is being rotated to improve the cleaning effect. The temperatu ...


5
Paul R Johnson, James Bero, Jeff Heitzman: Exhaust and particle wastes collecting device for laser etching. Iomega Corporation, Woodcock Washburn Kurtz Mackiewicz & Norris, November 8, 1994: US05362941 (12 worldwide citation)

The current invention provides an apparatus and method of collecting waste materials produced during laser etching of a floptical medium without blocking access to the medium surface. The invention also improves collection efficiency by applying a uniform low-pressure air around the outer edge of th ...



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