Patents by Inventor Alexander Van Der Lee

Alexander Van Der Lee 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).

  • Publication number: 20210116355
    Abstract: A method reduces false-positive particle counts detected by an interference particle sensor module, which has a laser and a light detector. The method including: emitting laser light; providing a high-frequency signal during the emission of the laser light, a modulation frequency of the high-frequency signal being between 10-500 MHz; detecting an optical response by the light detector in reaction to the emitted laser light while providing the high-frequency signal, which is arranged such that a detection signal caused by a macroscopic object positioned between a first and second distance is reduced in comparison to a detection signal caused by the macroscopic object at the same position without providing the high-frequency signal. The high-frequency signal is provided to a tuning structure of the particle sensor module which is arranged to modify a resonance frequency of an optical resonator comprised by the laser sensor module upon reception of the high-frequency signal.
    Type: Application
    Filed: December 21, 2020
    Publication date: April 22, 2021
    Inventors: Hans Spruit, Alexander Van der Lee, Philipp Henning Gerlach, Robert Wolf, Robert Weiss, Matthias Falk
  • Patent number: 10935483
    Abstract: An optical particle sensor device comprises an optical emitter device for emitting a multitude of measurement laser beams; a detector device for detecting the measurement laser beams scattered on particles in the vicinity of the optical particle sensor device and for generating a single measuring signal assigned to this for each measurement laser beam; and an evaluation device for determining at least one estimated particle value for the number of particles per volume using at least one single measurement signal, wherein the evaluation device determines at least two estimated particle values for the number of particles per volume, which are based on at least partially different single measurement signals and/or a different number of single measurement signals, and on the basis of at least part of the estimated particle values, determines at least one output value for the particle load.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: March 2, 2021
    Assignees: Robert Bosch GmbH, TRUMPF PHOTONIC COMPONENTS GMBH
    Inventors: Alexander Van Der Lee, Robert Weiss, Sören Sofke, Hans Spruit, Jens-Alrik Adrian
  • Patent number: 10782221
    Abstract: A system for determining a particle contamination and a method for determining a particle contamination in a measurement environment is provided in which individual particles in the measurement environment are detected (S1), wherein a) an estimate of the number of particles per volume in the measurement environment is ascertained (S2), b) an estimate of the number of particles per volume and characterization information describing the particle source in the measurement information are taken as a basis for ascertaining an output value for the particle contamination in the measurement environment (S3), and c) context-related data are made available and the characterization information is estimated on the basis of the available context-related data (S4).
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: September 22, 2020
    Assignees: ROBERT BOSCH GMBH, TRUMPF PHOTONIC COMPONENTS GMBH
    Inventors: Stefan Weiss, Alexander Herrmann, Robert Wolf, Alexander Van Der Lee, Wolfram Johannes Martin Lyda, Balazs Jatekos, Robert Weiss, Sören Sofke, Hans Spruit, Jens-Alrik Adrian, Matthias Falk, Dominik Moser
  • Publication number: 20200200577
    Abstract: The invention relates to a method for determining the absolute value of the flow velocity (v) of a particle-transporting medium. At least two measurement laser beams (L_i) with linearly independent, non-orthogonal measurement directions (b_i) are emitted. The measurement laser beams (L_i) scattered at particles are detected and one measurement signal (m_i) is generated in each case for each measurement laser beam (L_i).
    Type: Application
    Filed: December 18, 2019
    Publication date: June 25, 2020
    Inventors: Alexander Van Der Lee, Robert Weiss, Hans Spruit
  • Publication number: 20200173904
    Abstract: The invention relates to a method for detecting particles, having the steps of: receiving (S1) a measurement signal; calculating (S2) at least one estimated noise value using the received measurement signal; and detecting (S3) the particles using the measurement signal on the basis of at least one detection criterion, wherein the at least one detection criterion depends on the at least one calculated estimated noise value.
    Type: Application
    Filed: November 20, 2019
    Publication date: June 4, 2020
    Inventors: Robert Wolf, Alexander Van Der Lee, Rico Srowik, Hans Spruit, Okke Ouweltjes
  • Publication number: 20200132582
    Abstract: A system for determining a particle contamination and a method for determining a particle contamination in a measurement environment, is provided in which individual particles in the measurement environment are detected (S1), wherein a) an estimate of the number of particles per volume in the measurement environment is ascertained (S2), b) an estimate of the number of particles per volume and characterization information describing the particle source in the measurement information are taken as a basis for ascertaining an output value for the particle contamination in the measurement environment (S3), and c) context-related data are made available and the characterization information is estimated on the basis of the available context-related data (S4).
    Type: Application
    Filed: October 21, 2019
    Publication date: April 30, 2020
    Inventors: Stefan Weiss, Alexander Herrmann, Robert Wolf, Alexander Van Der Lee, Wolfram Johannes Martin Lyda, Balazs Jatekos, Robert Weiss, Sören Sofke, Hans Spruit, Jens-Alrik Adrian, Matthias Falk, Dominik Moser
  • Publication number: 20200056981
    Abstract: The invention relates to an optical particle sensor device (1), comprising an optical emitter device (2), which is designed to emit a multitude N of measurement laser beams (Li) into a vicinity of the optical particle sensor device (1); a detector device (3), which is designed to detect the measurement laser beams (Li) scattered on particles in the vicinity of the optical particle sensor device (1) and to generate to generate a single measuring signal (Ei) assigned to this for each measurement laser beam (Li); and an evaluation device (4), which is designed to determine at least one estimated particle value for the number of particles per volume using at least one single measurement signal (Ei).
    Type: Application
    Filed: August 15, 2019
    Publication date: February 20, 2020
    Inventors: Alexander Van Der Lee, Robert Weiss, Sören Sofke, Hans Spruit, Jens-Alrik Adrian
  • Publication number: 20200057180
    Abstract: The invention relates to an optical lens (10) for a photodiode-equipped device, which is arrangeable at and/or in the photodiode-equipped device in such a way that light beams (14) emitted by at least two photodiodes of the photodiode-equipped device transmit into the optical lens (10) through a light entrance side (S1) of the optical lens (10) and emerge from the optical lens (10) at a light exit side (S2) of the optical lens (10), and for which a central longitudinal axis (16) extending centrally through the light entrance side (S1) and centrally through the light exit side (S2) is definable, wherein the light entrance side (S1) of the optical lens (10) and the light exit side (S2) of the optical lens (10) are embodied in each case as a freeform surface for off-axis projection in such a way that the light beams (14) emitted by the photodiodes (32) arranged on a circular path around the central longitudinal axis (16) are focused off-axis by means of the optical lens (10).
    Type: Application
    Filed: August 15, 2019
    Publication date: February 20, 2020
    Inventors: Alexander Van Der Lee, Balazs Jatekos, Hans Spruit, Peter Jutte
  • Patent number: 9857287
    Abstract: A particle sensor apparatus having an optical emitter device that is configured to emit an optical radiation so that a volume having at least one particle possibly present therein is at least partly illuminatable; an optical detector device having at least one detection surface that is struck by at least a portion of the optical radiation scattered at the at least one particle, at least one information signal regarding an intensity and/or an intensity distribution of the optical radiation striking the at least one detection surface being outputtable; and an evaluation device with which an information item regarding a presence of particles, a number of particles, a particle density, and/or at least one property of particles is identifiable and outputtable, the particle sensor apparatus also encompassing at least one lens element that is disposed so that the emitted optical radiation is focusable onto a focus region inside the volume.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: January 2, 2018
    Assignees: ROBERT BOSCH GMBH, KONINKLIJKE PHILIPS N.V.
    Inventors: Niklas Dittrich, Frank Fischer, Reiner Schnitzer, Jochen Hellmig, Gael Pilard, Alexander Van der Lee
  • Publication number: 20160313243
    Abstract: A particle sensor apparatus having an optical emitter device that is configured to emit an optical radiation so that a volume having at least one particle possibly present therein is at least partly illuminatable; an optical detector device having at least one detection surface that is struck by at least a portion of the optical radiation scattered at the at least one particle, at least one information signal regarding an intensity and/or an intensity distribution of the optical radiation striking the at least one detection surface being outputtable; and an evaluation device with which an information item regarding a presence of particles, a number of particles, a particle density, and/or at least one property of particles is identifiable and outputtable, the particle sensor apparatus also encompassing at least one lens element that is disposed so that the emitted optical radiation is focusable onto a focus region inside the volume.
    Type: Application
    Filed: April 15, 2016
    Publication date: October 27, 2016
    Inventors: Niklas Dittrich, Frank Fischer, Reiner Schnitzer, Jochen Hellmig, Gael Pilard, Alexander van der Lee
  • Patent number: 8560180
    Abstract: The invention relates to a velocity determination apparatus for determining a relative velocity between a first object (12), to which the velocity determination apparatus is attachable, and a second object (1). The velocity determination apparatus comprises a laser (3) having a laser cavity (4) for emitting first radiation (5), which is reflected by the second object (1), wherein the reflected radiation interferes with the first radiation (5) within the laser cavity (4). An interference signal detector (7) detects an interference signal depending on the interference within the laser cavity (4) and a velocity determination unit (8) determines the relative velocity based on the interference signal. A reliability value determination unit (9) determines a reliability value for indicating the reliability of the determined relative velocity based on at least one of the group consisting of the detected interference signal, the determined relative velocity and a characteristic of the laser.
    Type: Grant
    Filed: September 7, 2009
    Date of Patent: October 15, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Holger Moench, Mark Carpaij, Alexander Van Der Lee
  • Publication number: 20110160967
    Abstract: The invention relates to a velocity determination apparatus for determining a relative velocity between a first object (12), to which the velocity determination apparatus is attachable, and a second object (1). The velocity determination apparatus comprises a laser (3) having a laser cavity (4) for emitting first radiation (5), which is reflected by the second object (1), wherein the reflected radiation interferes with the first radiation (5) within the laser cavity (4). An interference signal detector (7) detects an interference signal depending on the interference within the laser cavity (4) and a velocity determination unit (8) determines the relative velocity based on the interference signal. A reliability value determination unit (9) determines a reliability value for indicating the reliability of the determined relative velocity based on at least one of the group consisting of the detected interference signal, the determined relative velocity and a characteristic of the laser.
    Type: Application
    Filed: September 7, 2009
    Publication date: June 30, 2011
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Holger Moench, Mark Carpaij, Alexander Van Der Lee
  • Publication number: 20080062852
    Abstract: The present invention relates to an optical scanning device for reading and/or writing on a plurality of tracks on an optical storage medium (1), said scanning device comprising optical means (17) for focusing a plurality of beams, after being reflected from said medium, onto an observation plane (22), and for introducing astigmatism into at least one of said reflected beams, and a photo-detector (18) comprising a plurality of detector segments, arranged in said observation plane (22) to receive said at least one astigmatic reflected beam.
    Type: Application
    Filed: October 13, 2005
    Publication date: March 13, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Alexander Van Der Lee, Coen Theodoru Liedenbaum, Teunis Tukker
  • Publication number: 20080019237
    Abstract: A method for controlling an optical disc drive apparatus (1) which comprises: light beam generating means (31) for generating a plurality of N optical beams (32(i)); means (33, 34, 37) for focusing said beams in respective focus spots (F(i)); at least one adjustable member (34) for axially displacing said focus spots; comprises the step of calculating an optimum setting (ZOPTIMUM) for the adjustable member (34), such that the out-of-focus condition for the optical system (30) as a whole is as small as possible. The position of the adjustable member (34) may be controlled to be substantially equal to the said optimum setting (ZOPTIMUM). Or, one specific beam is maintained in a focus condition, the beam having number m=mOPT selected according to mOPT=±INTEGERSQUARE{(N?1)/(2?2)} in case N is odd or mOPT=±INTEGERROUND IN?(N?2)/8) in case N is even.
    Type: Application
    Filed: July 11, 2005
    Publication date: January 24, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Teunis TUKKER, Coen LIEDENBAUM, Alexander VAN DER LEE
  • Publication number: 20080008061
    Abstract: Thus, in conventional, one-dimensional optical storage, the data is arranged in a linear fashion and is read out by a single spot (102). In order to increase data rates and storage capacity, it has been proposed to arrange the data in an isotropic, hexagonal lattice (200) and employ multiple spots (202) for read-out. Due to the high bit-intensity, 2D inter symbol interference (ISI) has a significant effect on bit detection. Aberrations in the readout spots (202) can change the form of ISI and, therefore, hamper 2D bit detection. Thus, a method and apparatus is proposed, wherein by evaluating the ISI of the readout spots (202) by scanning over a known calibration pattern, i.e. a bit pattern selected such that its optical response is characteristic of the shape of the readout spot, the aberrations in the readout spot can be determined and beneficially compensated for, as required.
    Type: Application
    Filed: May 11, 2005
    Publication date: January 10, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Dominique Bruls, Alexander Van Der Lee, Christopher Busch
  • Publication number: 20070171785
    Abstract: The present invention relates to an optical reader for a two dimensional storage disc, comprising means (21, 22, 14, 15) for generating a plurality of laser beams and projecting said beams onto a rotating disc, means (24, 25, 26) for detecting the beams after being diffracted by the disc, and means (24, 27, 28) for determining a focus error signal (29) based on one of said plurality of beams. The plurality of beams comprises an array of beams having a first polarization, and a dedicated central focus tracking beam having a second polarization, orthogonal to the first polarization. The beams may be generated by a polarization dependent diffraction element. Or a beam having one polarization may be diffracted into a plurality of beams and recombined with a beam having another polarization.
    Type: Application
    Filed: April 22, 2005
    Publication date: July 26, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Alexander Van Der Lee, Christopher Busch
  • Publication number: 20070115782
    Abstract: A pick-up unit, an optical drive comprising such a pick-up unit, and a method of generating error-signals are described. Light reflected from an information carrier is injected into one or more VCSELs. The spatial intensity distribution of the emission from the VCSEL(s) is used for the generation of error signals in an optical pick-up unit. Alternatively, the relative timing for the switching of individual lasers of an array of VCSELs is used for the detection of error signals.
    Type: Application
    Filed: December 13, 2004
    Publication date: May 24, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONIC, N.V.
    Inventors: Ole Andersen, Robert Hendriks, Alexander Van Der Lee, Jan Van Der Werf
  • Publication number: 20070105253
    Abstract: In the described method of producing a plurality of bodies bearing equal imprints of a stamp as optical structures, a stamp (13) is initially produced, by attaching particles (14) to a surface (15) of an auxiliary body (16); than, the stamp (13) is used to produce an imprint (11) on a plurality of bodies (10). Optical structures can be irradiated, producing on a screen a speckle pattern indicative of a key. It is substantially impossible to clone a given optical structure with current technological means. Optical structures represent physical One-Way Functions, easy to compute in the forward sense but unfeasible to reverse. Thus, they can be used to build an access/copy protection system of user information contained in an information carrier associated with the body 10. The reproducibility of the optical structures makes this method suitable for optical disks.
    Type: Application
    Filed: May 10, 2004
    Publication date: May 10, 2007
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Robert Hendriks, Sjoerd Stallinga, Hendrik Goossens, Gert 'T Hooft, Alexander Van Der Lee, Frank Schuurmans, Rudolf Vullers, Ralph Kurt, Bernardus Hendrikus Hendriks, Levinus Bakker
  • Publication number: 20070104064
    Abstract: The invention relates to a data processing system comprising a computer having a memory for storage and retrieval of at least one application program embodying a pre-determined functionality, and for storage and retrieval of at least one data-file, which computer comprises a user interface for entertaining communication between the computer and a user of said computer, whereby the at least one application program comprises validation software for checking and enabling the operability of said application program in connection with the at least one data-file, and processing software for executing the said functionality in connection with the at least one data-file in dependence of said enabling by the validation software, whereby the validation software is executable separately and independent from the processing software.
    Type: Application
    Filed: November 30, 2004
    Publication date: May 10, 2007
    Inventors: Alexander Van Der Lee, Christopher Busch, Dominique Bruls, Peter Coops
  • Publication number: 20070082562
    Abstract: The present invention relates to an optical scanning device for reading out from or writing on an information carrier. Said optical scanning device comprises a radiation source for producing a radiation beam, means for dividing the rad i tion am infordation calriero sub-beams, focusing means for focusing the plurality of spots on said information carrier, which reflects said plurality of radiation sub-beams towards a detection branch and focus error detection means for detecting a focus error signal. Said focus error detection means comprise on said detection branch, a servo lens for focusing the reflected radiation sub-beams onto a focus plane, a spatial filter for isolating a reflected radiation sub-beam at the focus plane and a split detector for detecting a focus error signal from the isolated radiation sub-beam. The focus error detection means further comprise decision sub-means for deciding whether the focus error signal can be used to correct a position of the focusing means.
    Type: Application
    Filed: October 29, 2004
    Publication date: April 12, 2007
    Inventors: Alexander Van Der Lee, Christopher Busch