Patents by Inventor Daniel Feldkhun
Daniel Feldkhun 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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Publication number: 20230392920Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: ApplicationFiled: May 5, 2023Publication date: December 7, 2023Inventors: Eric Moore, Benjamin Braker, Daniel Feldkhun
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Patent number: 11782139Abstract: A serpentine delay-line waveguide feeding an array of grating couplers can be fabricated in a silicon photonic chip, or tile, with the grating couplers emitting light at an angle that varies with wavelength and delay between the couplers imparted by the waveguide. The beam-steering tile can be used to transmit or receive light from a scene. The tile can be arrayed with one or more other tiles for bistatic radar-lidar operation. A tile in the array may transmit probe and frequency-shifted reference beams, while another tile may receive a return at a heterodyne frequency giving a range to the scene. The pitch of the serpentine delay line may be different for transmitting and receiving tiles to suppress returns from unwanted directions. Pairs of phase-cohered tiles may illuminate a spot in the scene with fringe patterns, producing oscillating returns that can be processed to form a high-resolution sub-image by Fourier synthesis.Type: GrantFiled: March 28, 2019Date of Patent: October 10, 2023Assignee: The Regents of the University of Colorado, a Body CorporateInventors: Kelvin Wagner, Daniel Feldkhun, Milos Popovic
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Patent number: 11680790Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: GrantFiled: April 23, 2019Date of Patent: June 20, 2023Assignee: Cognex CorporationInventors: Benjamin Braker, Eric Moore, Daniel Feldkhun
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Publication number: 20210405201Abstract: A range-resolved imaging method includes sampling a plurality of 3D Fourier components of a target with a plurality of frequency-shifted beams that pair-wise interfere at the target. Each of the plurality of frequency-shifted beams has been emitted by a respective transmitter of a sparse transmitter-array. The method also includes extracting amplitudes and phases of temporal oscillations of a detected signal back-scattered by the target in response to the pair-wise interference of the plurality of frequency-shifted beams. The amplitudes and phases correspond to selected 3D Fourier components of a plurality of temporal Fourier components of the detected signal. The method also includes assembling the amplitudes and the phases in a 3D spatial-frequency representation; and producing a range-resolved image of the target via Fourier synthesis of the 3D Fourier representation.Type: ApplicationFiled: June 25, 2021Publication date: December 30, 2021Inventors: KELVIN H. WAGNER, DANIEL FELDKHUN, NATHAN DOSTART
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Publication number: 20200225332Abstract: A serpentine delay-line waveguide feeding an array of grating couplers can be fabricated in a silicon photonic chip, or tile, with the grating couplers emitting light at an angle that varies with wavelength and delay between the couplers imparted by the waveguide. The beam-steering tile can be used to transmit or receive light from a scene. The tile can be arrayed with one or more other tiles for bistatic radar-lidar operation. A tile in the array may transmit probe and frequency-shifted reference beams, while another tile may receive a return at a heterodyne frequency giving a range to the scene. The pitch of the serpentine delay line may be different for transmitting and receiving tiles to suppress returns from unwanted directions. Pairs of phase-cohered tiles may illuminate a spot in the scene with fringe patterns, producing oscillating returns that can be processed to form a high-resolution sub-image by Fourier synthesis.Type: ApplicationFiled: March 28, 2019Publication date: July 16, 2020Inventors: Kelvin Wagner, Daniel Feldkhun, Milos Popovic
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Publication number: 20190353472Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: ApplicationFiled: April 23, 2019Publication date: November 21, 2019Inventors: Benjamin Braker, Eric Moore, Daniel Feldkhun
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Patent number: 10317193Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: GrantFiled: May 29, 2017Date of Patent: June 11, 2019Assignee: COGNEX CORPORATIONInventors: Benjamin Braker, Eric Moore, Daniel Feldkhun
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Patent number: 9921161Abstract: Methods and systems are provided for estimating locations of sub-wavelength-sized emitters, which may be sparsely arrayed among inactive emitters, in one or more dimensions to synthesize a super-resolved image. The emitter emits light in response to structured illumination, which may be acousto-optically generated. The structured illumination is translated, and a detector, such as a camera pixel, senses the emitted linear or nonlinear response, producing a periodic signal. A processor computes a phase of the signal using phase shifting interferometry and uses it to estimate the emitter location with resolution finer than a quarter of the illumination wavelength. Modulation depth and/or amplitude of the signal may be used to estimate emitter size and/or evaluate location fidelity. Optical sectioning or extended depth of field may be provided by controlling spatial coherence of the illumination. Encoding and decoding emitter locations with non-periodic patterns is also described.Type: GrantFiled: January 8, 2016Date of Patent: March 20, 2018Inventor: Daniel Feldkhun
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Publication number: 20180045503Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: ApplicationFiled: May 29, 2017Publication date: February 15, 2018Inventors: Benjamin Braker, Eric Moore, Daniel Feldkhun
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Patent number: 9696137Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: GrantFiled: August 8, 2014Date of Patent: July 4, 2017Assignee: COGNEX CORPORATIONInventors: Benjamin Braker, Eric Moore, Daniel Feldkhun
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Patent number: 9684076Abstract: Methods, systems, and apparatuses are provided for measuring and mapping ranges, reflectivities, and/or velocities of multiple locations on an object by illuminating the locations with uniquely frequency-encoded sensing beams, which may be generated using one or more acousto-optic devices. A detector is used to sense the interference of the sensing beams reflected from the object and one or more reference beams, which may be co-propagating with the sensing beams to/from the object and/or may be provided via a separate reference path. A processor is used to estimate lateral coordinates, ranges, reflectivities, and/or velocities of the illuminated locations based on the frequencies, phases, amplitudes, and Doppler shifts, respectively, of the corresponding spectral components of the temporal beat signal produced by the detector in response to the interference of the sensing and reference beams.Type: GrantFiled: March 14, 2014Date of Patent: June 20, 2017Inventor: Daniel Feldkhun
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Patent number: 9310184Abstract: Methods and systems are provided for suppressing speckle and/or diffraction artifacts in coherent structured illumination sensing systems. A coherent radiation pattern forms an interference pattern at an illumination image plane and illuminates an object. Radiation scattered or otherwise emitted by the object is detected to produce a signal, which is integrated in time. Coherent artifact suppression is attained by using a spatial modulator, such as an acousto-optic device, to vary a phase gradient at the illumination image plane during the signal integration time. Various embodiments are provided for purposes including without limitation: preserving the depth of field of the coherent illumination; using the same acousto-optic device for pattern generation and coherent artifact suppression; electronically controlling the effective spatial coherence of the illumination system; and reducing errors due to coherent artifacts in a laser-based three dimensional imaging system.Type: GrantFiled: September 29, 2014Date of Patent: April 12, 2016Inventor: Daniel Feldkhun
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Publication number: 20150077764Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: ApplicationFiled: August 8, 2014Publication date: March 19, 2015Inventors: Benjamin Braker, Eric Moore, Daniel Feldkhun
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Publication number: 20150015891Abstract: Methods and systems are provided for suppressing speckle and/or diffraction artifacts in coherent structured illumination sensing systems. A coherent radiation pattern forms an interference pattern at an illumination image plane and illuminates an object. Radiation scattered or otherwise emitted by the object is detected to produce a signal, which is integrated in time. Coherent artifact suppression is attained by using a spatial modulator, such as an acousto-optic device, to vary a phase gradient at the illumination image plane during the signal integration time. Various embodiments are provided for purposes including without limitation: preserving the depth of field of the coherent illumination; using the same acousto-optic device for pattern generation and coherent artifact suppression; electronically controlling the effective spatial coherence of the illumination system; and reducing errors due to coherent artifacts in a laser-based three dimensional imaging system.Type: ApplicationFiled: September 29, 2014Publication date: January 15, 2015Inventor: Daniel Feldkhun
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Patent number: 8848200Abstract: Methods and systems are provided for suppressing speckle and/or diffraction artifacts in coherent structured illumination sensing systems. A coherent radiation pattern forms an interference pattern at an illumination image plane and illuminates an object. Radiation scattered or otherwise emitted by the object is detected to produce a signal, which is integrated in time. Coherent artifact suppression is attained by using a spatial modulator, such as an acousto-optic device, to vary a phase gradient at the illumination image plane during the signal integration time. Various embodiments are provided for purposes including without limitation: preserving the depth of field of the coherent illumination; using the same acousto-optic device for pattern generation and coherent artifact suppression; electronically controlling the effective spatial coherence of the illumination system; and reducing errors due to coherent artifacts in a laser-based three dimensional imaging system.Type: GrantFiled: October 5, 2012Date of Patent: September 30, 2014Inventor: Daniel Feldkhun
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Patent number: 8836921Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: GrantFiled: August 7, 2013Date of Patent: September 16, 2014Assignee: Chiaro Technologies LLCInventors: Daniel Feldkhun, Benjamin Braker, Eric Daniel Moore
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Publication number: 20130321791Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: ApplicationFiled: August 7, 2013Publication date: December 5, 2013Applicant: Chiaro Technologies LLCInventors: Daniel Feldkhun, Benjamin Braker, Eric Daniel Moore
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Patent number: 8558998Abstract: Methods and systems are disclosed of sensing an object. A first radiation is spatially modulated to generate a structured second radiation. The object is illuminated with the structured second radiation such that the object produces a third radiation in response. Apart from any spatially dependent delay, a time variation of the third radiation is spatially independent. With a single-element detector, a portion of the third radiation is detected from locations on the object simultaneously. At least one characteristic of a sinusoidal spatial Fourier-transform component of the object is estimated from a time-varying signal from the detected portion of the third radiation.Type: GrantFiled: September 28, 2011Date of Patent: October 15, 2013Assignee: The Regents of the University of Colorado, a Body CorporateInventors: Daniel Feldkhun, Kelvin H. Wagner
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Patent number: 8531650Abstract: Methods, systems, and apparatuses are provided for estimating a location on an object in a three-dimensional scene. Multiple radiation patterns are produced by spatially modulating each of multiple first radiations with a distinct combination of one or more modulating structures, each first radiation having at least one of a distinct radiation path, a distinct source, a distinct source spectrum, or a distinct source polarization with respect to the other first radiations. The location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns. Multiple measured values are produced by detecting the object radiations from the location on the object due to each pattern separately using one or more detector elements. The location on the object is estimated based on the multiple measured values.Type: GrantFiled: July 8, 2009Date of Patent: September 10, 2013Assignee: Chiaro Technologies LLCInventors: Daniel Feldkhun, Benjamin Braker, Eric Daniel Moore
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Publication number: 20130088723Abstract: Methods and systems are provided for suppressing speckle and/or diffraction artifacts in coherent structured illumination sensing systems. A coherent radiation pattern forms an interference pattern at an illumination image plane and illuminates an object. Radiation scattered or otherwise emitted by the object is detected to produce a signal, which is integrated in time. Coherent artifact suppression is attained by using a spatial modulator, such as an acousto-optic device, to vary a phase gradient at the illumination image plane during the signal integration time. Various embodiments are provided for purposes including without limitation: preserving the depth of field of the coherent illumination; using the same acousto-optic device for pattern generation and coherent artifact suppression; electronically controlling the effective spatial coherence of the illumination system; and reducing errors due to coherent artifacts in a laser-based three dimensional imaging system.Type: ApplicationFiled: October 5, 2012Publication date: April 11, 2013Inventor: Daniel Feldkhun