Patents by Inventor Gert Hooft

Gert Hooft 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).

  • Patent number: 8417307
    Abstract: The invention relates to a blood oximeter for measuring the oxygenation and at least one other parameter of flowing blood in living tissue. According to the invention, the blood oximeter comprises two lightsources (2, 3) emitting light of different wavelengths into tissue, and preferably a light detector (4) for detecting a transmitted and/or reflected part of the light emitted into the tissue, wherein at least one of the light sources is a laser with a laser cavity emitting a laser beam, the laser being adapted to allow a part of the laser beam which is scattered by the tissue to re-enter into the laser cavity, and wherein a laser beam sensor (7, 8) for measuring the light emitted from the laser is provided, the laser beam sensor (7, 8), thus, obtaining a signal which varies in accordance with the self-mixing interferometric effect between the original laser beam and the scattered laser beam.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: April 9, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Cristian Presura, Carsten Heinks, Olaf Such, Gary Nelson Garcia Molina, Gert Hooft
  • Publication number: 20100240973
    Abstract: The invention relates to a blood oximeter for measuring the oxygenation and at least one other parameter of flowing blood in living tissue. According to the invention, the blood oximeter comprises two lightsources (2, 3) emitting light of different wavelengths into tissue, and preferably a light detector (4) for detecting a transmitted and/or reflected part of the light emitted into the tissue, wherein at least one of the light sources is a laser with a laser cavity emitting a laser beam, the laser being adapted to allow a part of the laser beam which is scattered by the tissue to re-enter into the laser cavity, and wherein a laser beam sensor (7, 8) for measuring the light emitted from the laser is provided, the laser beam sensor (7, 8), thus, obtaining a signal which varies in accordance with the self-mixing interferometric effect between the original laser beam and the scattered laser beam.
    Type: Application
    Filed: September 24, 2008
    Publication date: September 23, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Cristian Presura, Carsten Heinks, Olaf Such, Gary N. Garcia Molina, Gert Hooft
  • Publication number: 20100105022
    Abstract: It is described a device (100) for analyzing biological cell material (115). The device (100) comprises a light source arrangement (120), which is adapted for directing a first (131) and a second illumination light (132) towards the cell material (115), wherein the first (131) and the second (132) illumination light comprises a first and a second spectral radiation component, respectively. The device (100) further comprises a detector arrangement (170), which is adapted for receiving a first measurement light (151) based on a first interaction of the first illumination light (131) with the cell material (115) and a second measurement light (152) based on a second interaction of the second illumination light (152) with the cell material (115).
    Type: Application
    Filed: March 10, 2008
    Publication date: April 29, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Stein Kuiper, Bernardus Hendrikus Wilhelmus Hendriks, Ruth Wilhelmine Ireen De Boer, Gert Hooft
  • Publication number: 20080094946
    Abstract: A method and an apparatus for scanning data stored along a track (16) on an optical storage medium (10) are provided. A light beam (12) is projected on the optical storage medium, thereby creating a scanning spot (14) that essentially follows the track (10). The relative position of the scanning spot (14) and the track (16) are varied in a radial direction. The variation of this positions occurs at a frequency v of v =?. S.4- NA/?, wherein NA is the numerical aperture of the light beam (12), X is the C wavelength of the light, S is the scanning speed, and ??0.01. The scanning spot is generated by a wavelength change is translated into a displacement of the beam by a pair of gratings.
    Type: Application
    Filed: June 28, 2005
    Publication date: April 24, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Sjoerd Stallinga, Gert Hooft, Johannes Joseph Hubertina Barbara Schleipen