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公开(公告)号：US20180172806A1
公开(公告)日：2018-06-21
申请号：US15887842
申请日：2018-02-02
Applicant: Raytheon Company
Inventor： Joseph Marron
CPC classification number: G01S7/4863 , G01S7/4865 , G01S7/4914 , G01S7/4917 , G01S13/89
Abstract: A frequency modulated (coherent) laser detection and ranging system includes a read-out integrated circuit formed with a two-dimensional array of detector elements each including a photosensitive region receiving both return light reflected from a target and light from a local oscillator, and local processing circuitry sampling the output of the photosensitive region four times during each sample period clock cycle to obtain quadrature components. A data bus coupled to one or more outputs of each of the detector elements receives the quadrature components from each of the detector elements for each sample period and serializes the received quadrature components. A processor coupled to the data bus receives the serialized quadrature components and determines an amplitude and a phase for at least one interfering frequency corresponding to interference between the return light and the local oscillator light using the quadrature components.
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公开(公告)号：US11476576B2
公开(公告)日：2022-10-18
申请号：US17174132
申请日：2021-02-11
Applicant: Raytheon Company
Inventor： Stephen P. Palese , Moe D. Soltani , Thomas R. Yengst , Charley A. Fodran , Joseph Marron , Duane D. Smith , Alexander Niechayev , Jeffrey P. Tate , James G. Leatham
Abstract: A device includes a photonic integrated circuit (PIC), which includes an optical phased array. The optical phased array includes multiple array elements, where each array element includes (i) an antenna element configured to transmit or receive optical signals and (ii) a phase modulator configured to modulate the optical signals transmitted or received by the antenna element. The PIC also includes at least one of (i) a source laser configured to generate optical energy, where the antenna elements are configured to transmit the optical signals based on the optical energy, and (ii) a receiver configured to receive and process the optical signals received by the antenna elements.
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公开(公告)号：US20210255325A1
公开(公告)日：2021-08-19
申请号：US17232863
申请日：2021-04-16
Applicant: Raytheon Company
Inventor： Joseph Marron , Maurice J. Halmos , Justin S. Grayer , David N. Sitter, JR. , Gamze Erten
Abstract: A coherent imaging system produces coherent flood illumination directed toward a remote object and local oscillator (LO) illumination derived based on a same master oscillator as the flood illumination. A Doppler sensor receives the LO illumination and a return of flood illumination reflected off the object. Doppler shift data from the Doppler sensor, corresponding to a longitudinal velocity of the object relative to the imaging system, is used to produce Doppler-shifted LO illumination received by a low bandwidth, large format focal plane array (FPA), together with the return illumination from the object. Interference between the Doppler-shifted LO illumination and the return illumination facilitates producing an image of the object with the low bandwidth FPA despite the longitudinal velocity. Pixel intensities from the FPA are integrated over a period approaching the maximum interference frequency. The Doppler sensor and FPA may concurrently process return for a high energy laser target spot.
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公开(公告)号：US10557927B2
公开(公告)日：2020-02-11
申请号：US15490855
申请日：2017-04-18
Applicant: RAYTHEON COMPANY
Inventor： Joseph Marron , Louis Zellinger , Arthur M. Newman , Vitaliy M. Kaganovich
Abstract: A system and method for forming a range rate estimate for a target with a laser detection and ranging system including a laser transmitter and an array detector. The method includes: transmitting a plurality of laser pulses at a pulse repetition frequency; forming a one dimensional time series array corresponding to a time record of ladar return photons detected with the array detector; fitting the time series array with a superposition of a sine and a cosine of an initial value of a tentative frequency; iteratively fitting the time series array with a superposition of a sine and a cosine of the tentative frequency, and adjusting the tentative frequency until a completion criterion is satisfied at a final value of the tentative frequency.
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公开(公告)号：US10401499B2
公开(公告)日：2019-09-03
申请号：US15072214
申请日：2016-03-16
Applicant: Raytheon Company
Inventor： Joseph Marron , Maurice J. Halmos , Justin S. Grayer , Gamze Erten , David N. Sitter, Jr.
IPC: H04N7/18 , G01S17/89 , H01S3/00 , H04N5/33 , G01S7/48 , G01P3/36 , G01S17/58 , F41H13/00 , G01S17/66 , G01S7/481 , G01S7/497 , G01S7/491
Abstract: A laser beam projection system builds on a coherent imaging to project a tightly focused laser beam onto a remote object. Coherent flood illumination and local oscillator (LO) illumination are based on one master oscillator. The coherent flood illumination is directed toward a remote object, with a second laser beam directed onto an aimpoint on the same object. A Doppler sensor provides Doppler shift data used to produce Doppler-shifted LO illumination received by a focal plane array, together with the return flood illumination. Interference between the Doppler-shifted LO illumination and the return flood illumination facilitates imaging the object despite the velocity. The wavefront error of the flood illumined remote object image is computed and compared to the desired wavefront of the second laser beam at the aimpoint, with the difference applied to a deformable mirror to shape the second laser beam wavefront for obtaining a desired aimpoint intensity profile.
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Patent Agency Ranking
公开(公告)号：US20180299536A1
公开(公告)日：2018-10-18
申请号：US15490855
申请日：2017-04-18
Applicant: RAYTHEON COMPANY
Inventor： Joseph Marron , Louis Zellinger , Arthur M. Newman , Vitaliy M. Kaganovich
CPC classification number: G01S7/4865 , G01S7/4808 , G01S7/4863 , G01S17/023 , G01S17/102 , G01S17/58 , G01S17/89
Abstract: A system and method for forming a range rate estimate for a target with a laser detection and ranging system including a laser transmitter and an array detector. The method includes: transmitting a plurality of laser pulses at a pulse repetition frequency; forming a one dimensional time series array corresponding to a time record of ladar return photons detected with the array detector; fitting the time series array with a superposition of a sine and a cosine of an initial value of a tentative frequency; iteratively fitting the time series array with a superposition of a sine and a cosine of the tentative frequency, and adjusting the tentative frequency until a completion criterion is satisfied at a final value of the tentative frequency.
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公开(公告)号：US10000000B2
公开(公告)日：2018-06-19
申请号：US14643719
申请日：2015-03-10
Applicant: Raytheon Company
Inventor： Joseph Marron
CPC classification number: G01S7/4863 , G01S7/4865 , G01S7/4914 , G01S7/4917 , G01S13/89
Abstract: A frequency modulated (coherent) laser detection and ranging system includes a read-out integrated circuit formed with a two-dimensional array of detector elements each including a photosensitive region receiving both return light reflected from a target and light from a local oscillator, and local processing circuitry sampling the output of the photosensitive region four times during each sample period clock cycle to obtain quadrature components. A data bus coupled to one or more outputs of each of the detector elements receives the quadrature components from each of the detector elements for each sample period and serializes the received quadrature components. A processor coupled to the data bus receives the serialized quadrature components and determines an amplitude and a phase for at least one interfering frequency corresponding to interference between the return light and the local oscillator light using the quadrature components.
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公开(公告)号：US11874378B2
公开(公告)日：2024-01-16
申请号：US17232863
申请日：2021-04-16
Applicant: Raytheon Company
Inventor： Joseph Marron , Maurice J. Halmos , Justin S. Grayer , David N. Sitter, Jr. , Gamze Erten
CPC classification number: G01S17/89 , G01S7/4812 , G01S17/58 , F41H13/005
Abstract: A coherent imaging system produces coherent flood illumination directed toward a remote object and local oscillator (LO) illumination derived based on a same master oscillator as the flood illumination. A Doppler sensor receives the LO illumination and a return of flood illumination reflected off the object. Doppler shift data from the Doppler sensor, corresponding to a longitudinal velocity of the object relative to the imaging system, is used to produce Doppler-shifted LO illumination received by a low bandwidth, large format focal plane array (FPA), together with the return illumination from the object. Interference between the Doppler-shifted LO illumination and the return illumination facilitates producing an image of the object with the low bandwidth FPA despite the longitudinal velocity. Pixel intensities from the FPA are integrated over a period approaching the maximum interference frequency. The Doppler sensor and FPA may concurrently process return for a high energy laser target spot.
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公开(公告)号：US11561291B2
公开(公告)日：2023-01-24
申请号：US16863262
申请日：2020-04-30
Applicant: RAYTHEON COMPANY
Inventor： Eran Marcus , Joseph Marron , Adam Hodge Greenberg
IPC: G01S7/48 , G01S7/484 , G01S17/58 , G01S7/4861
Abstract: A laser detection and ranging system and method for operating thereof. In some embodiments, the method includes: transmitting a plurality of laser pulses, each at a respective one of a plurality of pulse transmission times; detecting a plurality of return pulses, each at a respective one of a plurality of return pulse times; and estimating a range or a range rate of a target based on the pulse transmission times and the return pulse times. Each of the pulse transmission times may be offset from a corresponding nominal pulse transmission time by a respective pulse position modulation offset, the nominal pulse transmission times being uniformly spaced with a period corresponding to a pulse repetition frequency, the pulse repetition frequency being greater than 500 kHz.
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公开(公告)号：US11532881B2
公开(公告)日：2022-12-20
申请号：US17174180
申请日：2021-02-11
Applicant: Raytheon Company
Inventor： Richard L. Kendrick , Joseph Marron
Abstract: A method includes capturing measurements of optical signals transmitted from an optical phased array that includes (i) multiple array elements each having an antenna element and a phase modulator and (ii) an additional antenna element spaced apart from the array elements. The method also includes performing digital holography using the measurements to identify relative phases of the array elements with respect to a phase of the additional antenna element. In addition, the method includes modifying phases provided by at least some of the phase modulators of at least some of the array elements to bring the array elements more closely into phase with one another.
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