Patents by Inventor John M. Nieminen
John M. Nieminen 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).
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Patent number: 9372472Abstract: A system for order alignment of diffractively produced images is provided. The system comprises: a diffractive spatial light modulator (DSLM) configured to provide a computer generated hologram of an image; a substantially coherent light source configured to illuminate the DSLM which responsively produces the image along each of different diffractive order paths; and, at least one set of optical components located along respective diffractive order paths of the DSLM, the at least one set of optical components configured to align at least one respective image diffracted from the DSLM with at least another diffracted image at a common image plane.Type: GrantFiled: March 11, 2013Date of Patent: June 21, 2016Assignee: CHRISTIE DIGITAL SYSTEMS USA, INC.Inventors: Simon Guthrie, Michael Perkins, John Domm, John M. Nieminen
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Publication number: 20140253985Abstract: A system for order alignment of diffractively produced images is provided. The system comprises: a diffractive spatial light modulator (DSLM) configured to provide a computer generated hologram of an image; a substantially coherent light source configured to illuminate the DSLM which responsively produces the image along each of different diffractive order paths; and, at least one set of optical components located along respective diffractive order paths of the DSLM, the at least one set of optical components configured to align at least one respective image diffracted from the DSLM with at least another diffracted image at a common image plane.Type: ApplicationFiled: March 11, 2013Publication date: September 11, 2014Applicant: CHRISTIE DIGITAL SYSTEMS CANADA INC.Inventors: Simon GUTHRIE, Michael PERKINS, John DOMM, John M. NIEMINEN
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Publication number: 20130188382Abstract: An integrator rod is set forth having an input face, an output face and four side walls for internally reflecting light from the input face through the output face as a rectangular beam according to a predetermined aspect ratio, wherein only one of the side walls tapers from the output face to the input face for balancing brightness between opposite sides of the rectangular beam.Type: ApplicationFiled: January 20, 2012Publication date: July 25, 2013Applicant: CHRISTIE DIGITAL SYSTEMS USA, INC.Inventor: John M. NIEMINEN
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Patent number: 7957925Abstract: A distortion compensation method includes determining an undisturbed phase for at least one of a first position indication signal and a second position indication signal. The method includes determining an undisturbed ratio that relates the amplitude of the first position indication signal at a first frequency to the amplitude of the second position indication signal at a second frequency. The method also includes determining a disturbed amplitude of the position indication signal and adjusting a position indication based on the disturbed amplitude and phase, the undisturbed amplitude ratio, and the undisturbed phase. The method further comprises determining a relationship between the eddy current phase of the first position indication signal and the second position indication signal.Type: GrantFiled: August 23, 2010Date of Patent: June 7, 2011Assignee: Northern Digital Inc.Inventors: John M. Nieminen, Stefan R. Kirsch
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Publication number: 20110004430Abstract: A distortion compensation method includes determining an undisturbed phase for at least one of a first position indication signal and a second position indication signal. The method includes determining an undisturbed ratio that relates the amplitude of the first position indication signal at a first frequency to the amplitude of the second position indication signal at a second frequency. The method also includes determining a disturbed amplitude of the position indication signal and adjusting a position indication based on the disturbed amplitude and phase, the undisturbed amplitude ratio, and the undisturbed phase. The method further comprises determining a relationship between the eddy current phase of the first position indication signal and the second position indication signal.Type: ApplicationFiled: August 23, 2010Publication date: January 6, 2011Inventors: John M. Nieminen, Stefan R. Kirsch
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Patent number: 7783441Abstract: A distortion compensation method includes determining an undisturbed phase for at least one of a first position indication signal and a second position indication signal. The method includes determining an undisturbed ratio that relates the amplitude of the first position indication signal at a first frequency to the amplitude of the second position indication signal at a second frequency. The method also includes determining a disturbed amplitude of the position indication signal and adjusting a position indication based on the disturbed amplitude and phase, the undisturbed amplitude ratio, and the undisturbed phase. The method further comprises determining a relationship between the eddy current phase of the first position indication signal and the second position indication signal.Type: GrantFiled: April 15, 2004Date of Patent: August 24, 2010Assignee: Northern Digital Inc.Inventors: John M. Nieminen, Stefan R. Kirsch
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Patent number: 7469187Abstract: A distortion compensation method includes determining an undisturbed phase for at least one of a first position indication signal and a second position indication signal. The method includes determining an undisturbed ratio that relates the amplitude of the first position indication signal at a first frequency to the amplitude of the second position indication signal at a second frequency. The method also includes determining a disturbed amplitude of the position indication signal and adjusting a position indication based on the disturbed amplitude and phase, the undisturbed amplitude ratio, and the undisturbed phase. The method further comprises determining a relationship between the eddy current phase of the first position indication signal and the second position indication signal.Type: GrantFiled: January 13, 2006Date of Patent: December 23, 2008Assignee: Northern Digital Inc.Inventors: John M. Nieminen, Stefan R. Kirsch
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Patent number: 7353125Abstract: A distortion compensation method includes determining an undisturbed phase for at least one of a first position indication signal and a second position indication signal. The method includes determining an undisturbed ratio that relates the amplitude of the first position indication signal at a first frequency to the amplitude of the second position indication signal at a second frequency. The method also includes determining a disturbed amplitude of the position indication signal and adjusting a position indication based on the disturbed amplitude and phase, the undisturbed amplitude ratio, and the undisturbed phase. The method further comprises determining a relationship between the eddy current phase of the first position indication signal and the second position indication signal.Type: GrantFiled: January 13, 2006Date of Patent: April 1, 2008Assignee: Northern Digital Inc.Inventors: John M. Nieminen, Stefan R. Kirsch
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Publication number: 20040207389Abstract: A distortion compensation method includes determining an undisturbed phase for at least one of a first position indication signal and a second position indication signal. The method includes determining an undisturbed ratio that relates the amplitude of the first position indication signal at a first frequency to the amplitude of the second position indication signal at a second frequency. The method also includes determining a disturbed amplitude of the position indication signal and adjusting a position indication based on the disturbed amplitude and phase, the undisturbed amplitude ratio, and the undisturbed phase. The method further comprises determining a relationship between the eddy current phase of the first position indication signal and the second position indication signal.Type: ApplicationFiled: April 15, 2004Publication date: October 21, 2004Inventors: John M. Nieminen, Stefan R. Kirsch