Patents by Inventor Lee Mickleson

Lee Mickleson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dithered focusing systems
    Patent number: 4445209
    Abstract: A servo control system for maintaining an information detection device, such as a light beam, at the optimum focused position above an information track for retrieving the maximum amount of reflected radiation from an information track, such as a spiral recording track on a videodisc. The system of the invention includes an optical system, a piezoelectric dither element, a dither oscillator, circuitry for deriving an intermediate signal indicative of the effect of the dither on the detected signal derived from the information track, phase comparison circuitry for deriving an error signal from a comparison of the dither signal applied to the piezoelectric dither element and the actual dither modulation of the light beam retrieved from the information track, and a movable lens assembly responsive to the error signal for accurately focusing the light beam upon an information track.
    Type: Grant
    Filed: January 15, 1982
    Date of Patent: April 24, 1984
    Assignee: Discovision Associates
    Inventors: Lee Mickleson, Eric V. Olson
  • Dithered center tracking system
    Patent number: 4322837
    Abstract: A servo control system for maintaining an information detection device, such as a light beam, centered on a moving information track, such as a spiral recording track on a video disc. The system of the invention includes an optical system, a piezoelectric dither element coated with a resistive material, a dither oscillator, circuitry for deriving an intermediate signal indicative of the effect of dither on the detected signal derived from the information track, phase comparison circuitry for deriving a known error signal from a comparison of the dither signal applied to the piezoelectric element and the actual dither modulation of the light beam retrieved from the information track.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: March 30, 1982
    Assignee: Discovision Associates
    Inventors: Lee Mickleson, Eric V. Olson
  • Reproducing objective lens for videodiscs
    Patent number: 4286848
    Abstract: A reproducing objective lens for videodiscs comprising five single lenses for which the working distance is large and flatness of field and resolving power are high.
    Type: Grant
    Filed: January 25, 1979
    Date of Patent: September 1, 1981
    Assignee: Discovision Associates
    Inventor: Lee Mickleson
  • Write and read objective lens for high density storage
    Patent number: 4256374
    Abstract: A write and read objective lens for encoding and recovery of information upon a storage member comprising three single lenses and one achromatic doublet for which the working distance is large, flatness of field and resolving power are high and utilizable with a plurality of wavelengths of light.
    Type: Grant
    Filed: April 2, 1979
    Date of Patent: March 17, 1981
    Assignee: MCA Discovision, Inc.
    Inventor: Lee Mickleson