Patents by Inventor Bernhard Buettgen

Bernhard Buettgen 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: 20220091269
    Abstract: Apparatus for optical sensing includes an illumination assembly, which directs a first array of beams of optical radiation toward different, respective areas in a target scene while temporally modulating the beams with a carrier wave having a carrier frequency. A detection assembly receives the optical radiation that is reflected from the target scene, and includes a second array of sensing elements, which output respective signals in response to the optical radiation that is incident on the sensing elements during one or more detection intervals, which are synchronized with the carrier frequency, and objective optics, which form an image of the target scene on the second array. Processing circuitry drives the illumination assembly to apply a spatial modulation pattern to the first array of beams and processes the signals output by the sensing elements responsively to the spatial modulation pattern in order to generate a depth map of the target scene.
    Type: Application
    Filed: September 2, 2021
    Publication date: March 24, 2022
    Inventors: Bernhard Buettgen, Gregory A. Cohoon, Tomas G. Van den Hauwe
  • Patent number: 11226402
    Abstract: An optical ranging system includes a support, a light emitter mounted on the support, and a time-of-flight (“TOF”) sensor chip mounted on the support. The TOF sensor chip, for example, includes at least one main pixel and at least one reference pixel in a semiconductor substrate. A barrier that is substantially non-transparent to light emitted by the light emitter separates the at least one reference pixel from the at least one main pixel. The optical ranging system also includes features for reducing optical cross-talk between the light emitter and the pixels of the TOF sensor.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: January 18, 2022
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Bernhard Buettgen, Steffen Heinrich, Marco Ivano Buraschi
  • Publication number: 20210055419
    Abstract: Apparatus for optical sensing includes an illumination assembly, which directs optical radiation toward a target scene while modulating the optical radiation with a carrier wave having a predetermined carrier frequency. A detection assembly includes an array of sensing elements, which output respective signals in response to the optical radiation that is incident on the sensing elements during each of a plurality of detection intervals, which are synchronized with the carrier frequency at different, respective temporal phase angles, and objective optics, which form an image of the target scene on the array. Processing circuitry processes the signals output by the sensing elements in order to compute depth coordinates of the points in the target scene by combining the signals output by respective groups of more than four of the sensing elements.
    Type: Application
    Filed: June 29, 2020
    Publication date: February 25, 2021
    Inventors: Thierry Oggier, Andrew T. Herrington, Bernhard Buettgen
  • Publication number: 20210048531
    Abstract: Apparatus for optical sensing includes an illumination assembly, which is configured to direct a first array of beams of optical radiation toward different, respective areas in a target scene while modulating the beams with respective carrier waves having a common carrier frequency and different respective phase angles, which vary across the first array in a predefined spatial pattern. A detection assembly includes a second array of sensing elements, which are configured to output respective signals in response to the optical radiation that is incident on the sensing elements during one or more detection intervals, which are synchronized with the carrier frequency, and objective optics, which are configured to form an image of the target scene on the second array. Processing circuitry processes the signals output by the sensing elements in order to generate a depth map of the target scene.
    Type: Application
    Filed: July 26, 2020
    Publication date: February 18, 2021
    Inventors: Brian S. Medower, Bernhard Buettgen
  • Patent number: 10895643
    Abstract: The present disclosure describes intelligent illumination systems that use modulated light. For example, in one aspect, a method includes producing, by a light source, modulated illumination in a visible part of the spectrum, detecting three-dimensional image data based on at least a portion of the modulated light produced by the light source and reflected by a scene, and changing a characteristic of the modulated illumination based on the detected three-dimensional image data.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: January 19, 2021
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Michael Kiy, Bernhard Büttgen
  • Publication number: 20200412980
    Abstract: A sensor stack is described. The sensor stack includes first and second electromagnetic radiation sensors. The first electromagnetic radiation sensor has a high quantum efficiency for converting a first range of electromagnetic radiation wavelengths into a first set of electrical signals. The second electromagnetic radiation sensor is positioned in a field of view of the first electromagnetic radiation sensor and has a high quantum efficiency for converting a second range of electromagnetic radiation wavelengths into a second set of electrical signals and a low quantum efficiency for converting the first range of electromagnetic radiation wavelengths into the second set of electrical signals. The first range of wavelengths does not overlap the second range of wavelengths, and the second electromagnetic radiation sensor is at least partially transmissive to the first range of electromagnetic radiation wavelengths.
    Type: Application
    Filed: June 25, 2020
    Publication date: December 31, 2020
    Inventors: Gennadiy A. Agranov, Zachary M. Beiley, Andras G. Pattantyus-Abraham, Oray O. Cellek, Xiaofeng Fan, Gershon Rosenblum, Xiangli Li, Emanuele Mandelli, Bernhard Buettgen, Yuchuan Shao
  • Publication number: 20200386890
    Abstract: Sensing apparatus includes a radiation source, which emits pulses of optical radiation toward multiple points in a target scene. A receiver receives the optical radiation that is reflected from the target scene and outputs signals that are indicative of respective times of flight of the pulses to and from the points in the target scene. Processing and control circuitry selects a first pulse repetition interval (PRI) and a second PRI, greater than the first PRI, from a permitted range of PRIs, drives the radiation source to emit a first sequence of the pulses at the first PRI and a second sequence of the pulses at a second PRI, and processes the signals output in response to both the first and second sequences of the pulses in order to compute respective depth coordinates of the points in the target scene.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 10, 2020
    Inventors: Thierry Oggier, Bernhard Buettgen, Cristiano L. Niclass, Rahmi Hezar, Shingo Mandai, Darshan Shrestha, Gary Chung, Moshe Laifenfeld
  • Patent number: 10861889
    Abstract: A semiconductor device operable to demodulate incident modulated electromagnetic radiation, the semiconductor device comprising: a pinned photodiode structure including a substrate of a first type, an implant layer of a second type disposed within the substrate, first and second auxiliary implant layers of the second type disposed within the substrate and each disposed adjacent to the implant layer of the second type, an implant layer of the first type disposed within the implant layer of the second type and extending into the first and second auxiliary implant layers of the second type, an insulator disposed on a surface of the substrate, and a photo-detection region; first and second transfer gates disposed on a surface of the insulator, the transfer gates being operable to generate a field within the substrate; and first and second floating diffusion implant layers of the second type disposed within the substrate.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: December 8, 2020
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Bernhard Buettgen, Gözen Köklü, Theodor Walter Loeliger
  • Patent number: 10840282
    Abstract: Pixel devices and arrays of pixel devices are operable to demodulate modulated light incident on a photo-detection region of the pixel devices. The pixel devices can include floating diffusion implant layers and transfer gates. The floating diffusion implant layers and transfer gates are disposed such that photo-generated charge carriers can be conducted to the floating diffusion implant layers over minimal charge-carrier transport paths.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: November 17, 2020
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Gözen Köklü, Bernhard Büttgen
  • Publication number: 20200319320
    Abstract: An optoelectronic module including a light emitter to generate light to be emitted from the module, a plurality of spatially distributed light sensitive elements arranged to detect light from the emitter that is reflected by an object outside the module, and one or more dedicated spurious-reflection detection pixels.
    Type: Application
    Filed: June 8, 2020
    Publication date: October 8, 2020
    Inventors: Jens Kubacki, Jim Lewis, Miguel Bruno Vaello Paños, Michael Lehmann, Stephan Beer, Bernhard Buettgen, Daniel Pérez Calero, Bassam Hallal
  • Publication number: 20200319321
    Abstract: An optoelectronic module including a light emitter to generate light to be emitted from the module; a plurality of spatially distributed light sensitive elements arranged to detect light from the emitter that is reflected by an object outside the module; and one or more dedicated spurious-reflection detection pixels.
    Type: Application
    Filed: June 8, 2020
    Publication date: October 8, 2020
    Inventors: Jens Kubacki, Jim Lewis, Miguel Bruno Vaello Paños, Michael Lehmann, Stephan Beer, Bernhard Buettgen, Daniel Pérez Calero, Bassam Hallal
  • Patent number: 10705192
    Abstract: Optoelectronic modules (100) are operable to distinguish between signals indicative of reflections from an object of interest and signals indicative of a spurious reflection. Various modules are operable to recognize spurious reflections by means of dedicated spurious-reflection detection pixels (126) and, in some cases, also to compensate for errors caused by spurious reflections.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: July 7, 2020
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Jens Kubacki, Jim Lewis, Miguel Bruno Vaello Paños, Michael Lehmann, Stephan Beer, Bernhard Buettgen, Daniel Pérez Calero, Bassam Hallal
  • Patent number: 10677923
    Abstract: The present disclosure describes optoelectronic modules that, in some implementations, address the need to combine precise measurements of scenes over a range of near and far distances. For example, an optoelectronic module can include a light emitter operable to direct modulated structured light onto a scene. The module includes an imager to receive reflected light signals from the scene. The imager includes demodulation pixels operable to provide amplitude and phase information based on the reflected light signals. Various techniques can be used to derive distance or three-dimensional information about the scene based on the signals from the pixels.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: June 9, 2020
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Bernhard Büttgen, Moshe Doron
  • Patent number: 10578739
    Abstract: An optoelectronic module operable to acquire distance data and spectral data includes an array of demodulation pixels and an array of spectral filters. The demodulation pixels can possess an intrinsic wavelength-dependent sensitivity, wherein the intrinsic wavelength-dependent sensitivity can be offset by an intensity balancing micro-lens array in some cases. In some cases, the intrinsic wavelength-dependent sensitivity can be offset by a combined filter array, while in other cases the intrinsic wavelength-dependent sensitivity can be offset by an intensity balancing filter array. Still in other cases, the demodulation pixels can be operable in such as to offset the intrinsic wavelength-dependent sensitivity.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: March 3, 2020
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Bernhard Buettgen, Gözen Köklü, Daniel Furrer, Stephan Beer, Miguel Bruno Vaello Paños
  • Publication number: 20200066771
    Abstract: Pixel devices and arrays of pixel devices are operable to demodulate modulated light incident on a photo-detection region of the pixel devices. The pixel devices can include floating diffusion implant layers and transfer gates. The floating diffusion implant layers and transfer gates are disposed such that photo-generated charge carriers can be conducted to the floating diffusion implant layers over minimal charge-carrier transport paths.
    Type: Application
    Filed: October 21, 2016
    Publication date: February 27, 2020
    Inventors: Gözen Köklü, Bernhard Buettgen
  • Patent number: 10466355
    Abstract: An optoelectronic module includes a first light emitter operable to emit radiation at a first wavelength toward an object outside the module. The module also includes demodulation pixels operable to detect radiation of the first wavelength reflected from the object. One or more processors are operable to determine a distance to the object based on the radiation detected by the demodulation pixels. The module is further operable to perform a supplemental measurement other than distance.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: November 5, 2019
    Assignee: AMS SENSORS SINGAPORE PTE. LTD.
    Inventors: Bernhard Buettgen, Jens Geiger, Michael Kiy, Oliver Chidley, Markus Rossi
  • Patent number: 10418410
    Abstract: Optoelectronic modules operable to collect distance data and spectral data include demodulation pixels operable to collect spectral data and distance data via a time-of flight approach. The demodulation pixels include regions with varying charge-carrier mobilities. Multi-wavelength electromagnetic radiation incident on the demodulation pixels are separated into different portions wherein the respective portions are used to determine the composition of the incident multi-wavelength electromagnetic radiation. Accordingly, the optoelectronic module is used, for example, to collect colour images and 3D images, and/or ambient light levels and distance data. The demodulation pixels comprise contact nodes that generate potential regions that vary in magnitude with the lateral dimension of the semiconductor substrate. The potential regions conduct the photo-generated charges from the photo-sensitive detection region to a charge-collection region.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: September 17, 2019
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Bernhard Buettgen, James Eilertsen
  • Patent number: 10401496
    Abstract: An optoelectronic module operable to collect distance data via a time-of-flight mode and a time-of-flight-triangulation mode includes an illumination assembly and an imaging assembly. The imaging assembly includes at least one demodulation pixel operable to determine distance to an object via a time-of-flight mode and a time-of-flight-triangulation mode. Multi-path distance inaccuracies can be mitigated in some implementations.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: September 3, 2019
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventor: Bernhard Buettgen
  • Patent number: 10359505
    Abstract: The present disclosure describes optical imaging and optical detection modules that include sensors such as time-of-flight (TOF) sensors. Various implementations are described that, in some instances, can help reduce the amount of optical cross-talk between active detection pixels and reference pixels and/or can facilitate the ability of the sensor to determine an accurate phase difference to be used, for example, in distance calculations.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: July 23, 2019
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Bernhard Buettgen, Miguel Bruno Vaello Paños, Stephan Beer, Michael Lehmann, Daniel Pérez Calero, Sophie Godé, Bassam Hallal
  • Patent number: 10295657
    Abstract: A time of flight-based system is operable for ambient light measurements. A method of operation includes detecting, in at least one active demodulation detection pixel, a first particular wavelength and generating amplitude data of the first particular wavelength; and detecting, in at least one spurious reflection detection pixel, a second particular wavelength and generating amplitude data of the second particular wavelength. In a computational device that stores spectrum data corresponding respectively to a plurality of different ambient light source types, an ambient lighting condition is determined based on the amplitude data of the first particular wavelength, the amplitude data of the second particular wavelength and the spectrum data of a particular one of the ambient light source types associated with the amplitude data of the first particular wavelength and the amplitude data of the second particular wavelength.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: May 21, 2019
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Bernhard Buettgen, Jens Geiger, Michael Kiy, Oliver Chidley, Markus Rossi