1
Fred Thomas Fred Thomas
Thomas Fred Charles, Wallentine Don W, Bero James, Wilson Scott: Acousto-optical intensity control of laser beam. Minnesota Mining And Manufacturing Company, KURTZ Richard E, December 23, 1993: WO/1993/025341

The intensity of a beam of light used to etch concentric servo tracks (12) on a magnetic medium is adjusted with an acousto-optical device to maintain the energy density delivered by the beam substantially constant while the optics (71) which generate the beam move radially of the disk (61).


2
Fred Thomas Fred Thomas
Thomas Fred Charles, Johnson Paul R: Pneumatic hub locking device for etching optical servo tracks on magnetic disks. Minnesota Mining And Manufacturing Company, KURTZ Richard E, December 23, 1993: WO/1993/025343

An apparatus for etching optical servo tracks on a magnetic storage disk (11) comprises optics for generating a beam of light for etching the servo tracks and a spindle (15) for rotating the disk (11) in proximity to the optics. The device further comprises a center pin (16) at the center of rotatio ...


3
Fred Thomas Fred Thomas
Thomas Fred Charles, Bero James, Short Robert, Johnson Paul R: Apparatus for and method of verifying etching of optical servo information on magnetic media. Minnesota Mining And Manufacturing Company, KURTZ Richard E, December 23, 1993: WO/1993/026004

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 occured. A light source (40) provides a collimated incident beam of light (42). The incident beam is focused to a point on the medium (57) and ...


4
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.


5
Fred Thomas Fred Thomas
Johnson Paul R, Bero James, Carter Jeff G, Candia Anthony M, Kieger George T, Hales Ronald F, Thomas Fred C Iii: A method of and apparatus for removing debris from the floptical medium. Minnesota Mining And Manufacturing Company, KURTZ Richard E, January 6, 1994: WO/1994/000274

A method and apparatus for removal of particulate waste materials or debris (10) from the floptical medium (1) after laser etching. A low temperature gas containing ice crystals (4) is applied at a predetermined angle while the floptical medium (1) is being rotated to improve the cleaning effect. Th ...


6
Fred Thomas Fred Thomas
Thomas Fred C Iii: Retroreflective marker for data storage cartridge. Iomega Corporation, KURTZ Richard E, August 22, 1996: WO/1996/025737

A cartridge (10) for a data storage disk drive (40) has a retroreflective marker (11). Light from a source (21) is reflected from the marker almost exactly on its incident path. This property makes possible unique identification of the cartridge (10) with minimal sensitivity to light reflected from ...


7
Cotter Douglas A: Signal correction system. Corning Glass Works, Zebrowski Walter S, Patty Jr Clarence R, Kurtz Richard E, November 11, 1975: US3919473 (26 worldwide citation)

In a system producing stored digital words representing an optical image, a digital error correction system automatically corrects the video signal for shading. A television camera converts the optical image of a laboratory microscope slide into an analog electrical signal representing the optical i ...


8
Amos Lynn G, Bacus James W, Beaty Robert C, Rogers Charles H: Blood smeared slide centrifuge. Corning Glass Works, Zebrowski Walter S, Patty Jr Clarence R, Kurtz Richard E, September 23, 1975: US3906890 (17 worldwide citation)

In the preparation of blood films for microscopic examination a slide spins in a centrifuge for a time which is a function of the red blood cell concentration of the blood. A drive circuit controls the time of spinning of a slide centrifuge. A variable control for the centrifuge motor includes a man ...


9
Carter Charles N, Sage Burton H: Detection of eosinophil cells on a blood smeared slide. Corning Glass Works, Kurtz Richard E, Zebrowski Walter S, June 25, 1974: US3819913 (17 worldwide citation)

In an automated blood cell identification system a high resolution microscope and a split path optical system produce a blue filtered image and a yellow filtered image of an eosinophil blood cell. These images are converted into digital histograms representing the optical density of points in each i ...


10
Pettersen Aage: Digital calibration system for an electronic instrument. Corning Glass Works, Zebrowski Walter S, Patty Jr Clarence R, Kurtz Richard E, June 10, 1975: US3889255 (16 worldwide citation)

In a pH measuring instrument, automatic calibration (sloping) is performed by placing the pH electrode in a standard solution, dialing the pH of this standard solution into a decade thumb wheel switch, and depressing the slope switch. The measurement voltage from the electrode is converted to a bina ...



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