Patents Assigned to Microvision, Inc.
  • Patent number: 10935640
    Abstract: A scanning light detection and ranging (LIDAR) system includes a scanning apparatus that scans laser light pulses sinusoidally in a vertical direction, and quasi-statically through angular extents in a horizontal direction. Multiple light sensors, each with a substantially nonoverlapping field of view, are multiplexed during the scan of the laser light pulses. Multiple scanning LIDAR systems may be combined to increase the effective horizontal angular extents.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: March 2, 2021
    Assignee: Microvision, Inc.
    Inventor: Robert James Jackson
  • Patent number: 10871569
    Abstract: Laser light pulses of at least two different wavelengths are reflected off a scanning mirror. A first time-of-flight distance measurement circuit receives reflected light pulses of a first wavelength and determines distances. A second time-of-flight distance measurement circuit receives reflected light pulses of a second wavelength and determines distances. The laser light pulses of different wavelengths may be interleaved in time to increase resolution. The laser light pulses of different wavelengths may also be used for detecting safety violations and/or power control.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: December 22, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Bin Xue
  • Patent number: 10859704
    Abstract: Laser light pulses of at least two different wavelengths are reflected off a scanning mirror. A first time-of-flight distance measurement circuit receives reflected light pulses of a first wavelength and determines distances. A second time-of-flight distance measurement circuit receives reflected light pulses of a second wavelength and determines distances. The laser light pulses of different wavelengths may be interleaved in time to increase resolution. The laser light pulses of different wavelengths may also be used for detecting safety violations and/or power control.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: December 8, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Bin Xue
  • Patent number: 10845469
    Abstract: Devices and methods are described that provide for scanning surfaces and generating 3-dimensional point clouds that describe the depth of the measured surface at each point. In general, the devices and methods utilize. Specifically, the depth mapping devices and methods utilize multiple receiver channels, with each receiver channel configured to have a different effective sensing range. These multiple receiver channels together provide the depth mapping device with an increased overall effective sensing range. Thus, the depth mapping device can effectively map surfaces that are closer and/or farther than could be mapped using only one receiver channel.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: November 24, 2020
    Assignee: Microvision, Inc.
    Inventors: Jari Honkanen, Robert James Jackson
  • Patent number: 10831019
    Abstract: An angular velocity correcting optical device receives a sinusoidally swept input light beam and outputs a non-sinusoidally swept output beam. The output beam may have a constant angular velocity. The output beam may have a constant pitch on a target surface for a constant periodicity pulsed light beam. Optical surfaces may be freeform surfaces specified by polynomials.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: November 10, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Matthieu Saracco, Roger F. Johnson, Ian Blanch
  • Patent number: 10761188
    Abstract: A projection system emits light pulses in a field of view and measures properties of reflections. Properties may include time of flight and return amplitude. Foreground objects and background surfaces are distinguished, distances between foreground objects and background surfaces are determined based on reflections that are occluded by the foreground objects and other properties of the projection system.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: September 1, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Jonathan A. Morarity, Alga Lloyd Nothern, III, Bin Xue
  • Patent number: 10742942
    Abstract: Devices and methods are described herein to measure optical power in scanning laser projectors. In general, the devices and methods utilize a polarizing component and photodiode to measure optical power being generated by at least one laser light source. The polarizing component is configured to polarize at least a portion of the laser beam in a way that improves the accuracy and consistency of this optical power measurement. Specifically, the polarizing component filters at least a portion of the laser beam for one polarization state in a way that facilitates improved reliability in the amount of laser light directed into the photodiode.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: August 11, 2020
    Assignee: Microvision, Inc.
    Inventors: Matthieu Saracco, Alga Lloyd Nothern, III, Thomas Byeman
  • Patent number: 10671219
    Abstract: A scanning display system includes smart infrared pulsing to detect gestures and touch events with reduced power consumption. Infrared laser light pulses are emitted at a first density in a field of view and reflections are detected. Times of flight of the infrared laser light pulses are measured to determine if an object is in the field of view. The density of the infrared pulses may be increased based on various factors to detect gestures and touch events. Power consumption is reduced by reducing the density of laser pulses when possible.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: June 2, 2020
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Jari Honkanen
  • Patent number: 10643820
    Abstract: A multi-beam apparatus for observing a sample with high resolution and high throughput is proposed. In the apparatus, a source-conversion unit changes a single electron source into a virtual multi-source array, a primary projection imaging system projects the array to form plural probe spots on the sample, and a condenser lens adjusts the currents of the plural probe spots. In the source-conversion unit, the image-forming means is on the upstream of the beamlet-limit means, and thereby generating less scattered electrons. The image-forming means not only forms the virtual multi-source array, but also compensates the off-axis aberrations of the plurality of probe spots.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: May 5, 2020
    Assignee: HERMES MICROVISION INC.
    Inventors: Weiming Ren, Shuai Li, Xuedong Liu, Zhongwei Chen
  • Patent number: 10613341
    Abstract: A beam combining device combines laser beams and performs speckle reduction of the laser light. Two laser beams are incident on a non-polarizing beam splitter and combined beams are split into two light paths with different optical path lengths. The two light paths may have different geometric path lengths and/or different indices of refraction in the paths to produce the different optical path lengths. One of the light paths is passed through a polarization rotation device and then the two light paths are recombined with a polarizing beam splitter to produce a combined reduced speckle laser beam.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: April 7, 2020
    Assignee: Microvision, Inc.
    Inventors: Alga Lloyd Nothern, III, Matthieu Saracco, Roeland Collet, Thomas Byeman
  • Patent number: 10598943
    Abstract: A bi-acylindrical lens collimates a divergent elliptical laser beam. A first surface of the bi-acylindrical lens is shaped to form a first acylindrical lens, and a second surface of the bi-acylindrical lens is shaped to form a second acylindrical lens. The first acylindrical lens collimates the divergent elliptical laser beam on the fast axis, and the second acylindrical lens collimates the diverging elliptical laser beam on the slow axis.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: March 24, 2020
    Assignee: Microvision, Inc.
    Inventor: Matthieu Saracco
  • Patent number: 10591719
    Abstract: The embodiments described herein provide improved scanner assemblies that include a first plastic body, a second plastic body, a movable scanning platform and a drive device. The first plastic body includes a first plurality of coupling structures, while the second plastic body includes a second plurality of coupling structures. The moveable scanning platform is positioned between the first plastic body and the second plastic body, and each of the first plurality of coupling structures is welded to a corresponding one of the second plurality of coupling structures.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: March 17, 2020
    Assignee: Microvision, Inc.
    Inventors: Thomas Byeman, Naili Yue, Sumit Sharma
  • Patent number: 10503265
    Abstract: Briefly, in accordance with one or more embodiments, a MEMS laser beam display to implement mixed-mode depth detection comprises an imaging engine to project an image in a field of view of the MEMS laser beam display, a time of flight (TOF) depth detector to determine a distance to a target within the field of view in a first mode of depth detection, wherein the TOF depth detector determines coarse depth data of the target, and a structured light depth detector to determine a distance to the target in a second mode of depth detection, wherein the structured light depth detector determines fine depth data of the target. Depth processing circuitry may generate a composite three-dimensional (3D) image of the target, or may identify a gesture region of the target for gesture recognition.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: December 10, 2019
    Assignee: Microvision, Inc.
    Inventor: P. Selvan Viswanathan
  • Patent number: 10481739
    Abstract: Briefly, in accordance with one or more embodiments, an information handling system comprises a scanning system to scan one or more component wavelength beams into a combined multi-component beam in a first field of view, and a redirecting system to redirect one or more of the component wavelength beams into a second field of view. A first subset of the one or more component wavelength beams is projected in the first field of view and a second subset of the one or more component wavelength beams is projected in the second field of view. The first subset may project a visible image in the first field of view, and user is capable of providing an input to control the information handling system via interaction with the second subset in the second field of view.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: November 19, 2019
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Roeland Collet, George Thomas Valliath, Jari Honkanen, Matthieu Saracco
  • Patent number: 10474296
    Abstract: Laser scanning devices and methods are described that provide for improved touch detection. The laser scanning devices and methods determine if an object is touching a touch surface by determining if a halo region having corresponding locally high amplitude signals is proximate to the object. The presence of such a halo region can confirm that the object is touching surface and not just hovering above the surface. Furthermore, the presence of the halo region can confirm object touching even for objects having significantly different sizes. As one example, the determined presence of the halo region can be used to reliably determine that a human finger is touching the surface even though human fingers can have significantly different sizes.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: November 12, 2019
    Assignee: Microvision, Inc.
    Inventor: Chao Chen
  • Patent number: 10474248
    Abstract: A scanned beam 3D sensing system includes smart infrared pulsing to detect objects in a field of view. Infrared laser light pulses are emitted at a first density in a field of view and reflections are detected. Times of flight of the infrared laser light pulses are measured to determine if an object is in the field of view. The density of the infrared pulses may be increased based on various factors. The higher density infrared pulses may be scanned in a region of interest that is a subset of the field of view. Power consumption is reduced by reducing the density of laser pulses when possible.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: November 12, 2019
    Assignee: Microvision, Inc.
    Inventors: P. Selvan Viswanathan, Jari Honkanen
  • Patent number: 10468227
    Abstract: This invention provides a charged particle source, which comprises an emitter and means of generating a magnetic field distribution. The magnetic field distribution is minimum, about zero, or preferred zero at the tip of the emitter, and along the optical axis is maximum away from the tip immediately. In a preferred embodiment, the magnetic field distribution is provided by dual magnetic lens which provides an anti-symmetric magnetic field at the tip, such that magnetic field at the tip is zero.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: November 5, 2019
    Assignee: HERMES MICROVISION, INC.
    Inventor: Shuai Li
  • Patent number: 10382732
    Abstract: A resonant scanning mirror includes a sensor to provide position information. A parameter estimation circuit estimates parameters from the position information. The parameter estimation circuit includes wideband analog circuits that have poles far removed from the resonant frequency of the scanning mirror. The parameter estimation circuit also includes an analog-to-digital converter that samples at a high sample rate, and digital filters that exhibit near perfect linearity.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: August 13, 2019
    Assignee: Microvision, Inc.
    Inventor: Patrick J. McVittie
  • Patent number: 10380731
    Abstract: A method and system for inspecting defects saves scanned raw data as an original image so as to save time for repeated scanning and achieve faster defect inspection and lower false rate by reviewing suspicious defects and other regions of interest in the original image by using the same or different image-processing algorithm with the same or different parameters.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: August 13, 2019
    Assignee: HERMES MICROVISION INC.
    Inventors: Wei Fang, Jack Jau
  • Patent number: 10303044
    Abstract: A scanning mirror resonates on a first axis and moves on a second axis at a frequency dictated by a sync signal. The period of movement on the second axis is not necessarily an integer multiple of the period of movement on the first axis. A drive circuit excites movement of the mirror. The drive circuit adds a position offset to the signal that excites movement on the second axis. The position offset is capable of causing the resonant movement on the first axis to scan a substantially identical trajectory for at least a portion of each period on the second axis.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: May 28, 2019
    Assignee: Microvision, Inc.
    Inventors: Jonathan A. Morarity, Damon M. Domjan