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公开(公告)号：US10955534B2
公开(公告)日：2021-03-23
申请号：US15799132
申请日：2017-10-31
Applicant: Raytheon Company
Inventor： Maurice J. Halmos
Abstract: Methods and systems for generating a high bandwidth linear FM chirp for a laser detection and ranging (LADAR) transceiver is described herein. The LADAR transceiver includes an array of laser sources configured to generate a series of pulses with each pulse offset in frequency by a respective frequency offset from a previous pulse and a subsequent pulse in the series of pulses. A ladder signal can be generated from the series of pulses and modulated with a modulation signal having a modulation bandwidth corresponding to the frequency offset between each pulse to generate the linear chirp signal. The linear chirp signal can have a chirp bandwidth corresponding to the number of laser sources in an array and a modulation bandwidth of the modulation signal.
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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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公开(公告)号：US20190129016A1
公开(公告)日：2019-05-02
申请号：US15799132
申请日：2017-10-31
Applicant: Raytheon Company
Inventor： Maurice J. Halmos
Abstract: Methods and systems for generating a high bandwidth linear FM chirp for a laser detection and ranging (LADAR) transceiver is described herein. The LADAR transceiver includes an array of laser sources configured to generate a series of pulses with each pulse offset in frequency by a respective frequency offset from a previous pulse and a subsequent pulse in the series of pulses. A ladder signal can be generated from the series of pulses and modulated with a modulation signal having a modulation bandwidth corresponding to the frequency offset between each pulse to generate the linear chirp signal. The linear chirp signal can have a chirp bandwidth corresponding to the number of laser sources in an array and a modulation bandwidth of the modulation signal.
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公开(公告)号：US20170356984A1
公开(公告)日：2017-12-14
申请号：US15182423
申请日：2016-06-14
Applicant: RAYTHEON COMPANY
Inventor： Maurice J. Halmos
CPC classification number: G01S7/4865 , G01S17/10 , G01S17/58
Abstract: A method for removing Doppler ambiguity in a ladar system. The time of each pulse of a sequence of transmitted pulses is offset from that of a uniform sequence of pulses. Each received pulse is represented by a complex number corresponding to its amplitude and phase, and each complex number of the resulting array of complex numbers is multiplied by a complex correction factor having a phase proportional to (i) the time offset of the corresponding pulse, and to (ii) a test frequency of an array of test frequencies, to form a second array of complex numbers. A Fourier transform of the second array is taken, and the value at the test frequency is copied into a corrected spectrum array. The process is repeated for each test frequency in the array of test frequencies, to generate a complete corrected spectrum array.
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公开(公告)号：US11728901B2
公开(公告)日：2023-08-15
申请号：US17717763
申请日：2022-04-11
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Benjamin P. Dolgin , Gary M. Graceffo , Jae H. Kyung , Maurice J. Halmos
IPC: H04B10/69
CPC classification number: H04B10/6911
Abstract: Optical signal receivers, systems, and methods of operating the same include a non-line of sight optical signal receiver configured to receive and detect a complex modulated optical signal through a non-line of site propagation path from an optical transmitter, comprising an optical resonator configured to receive the complex modulated optical signal through the non-line of sight propagation path, and to convert the complex modulated optical signal to an intensity modulated signal, and a detector configured to convert the intensity modulated signal into an electrical signal, the electrical signal having an amplitude indicative of an intensity of the intensity modulated signal from the optical resonator, and to provide a detected signal.
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Patent Agency Ranking
公开(公告)号：US10996336B2
公开(公告)日：2021-05-04
申请号：US14988476
申请日：2016-01-05
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：US10884252B2
公开(公告)日：2021-01-05
申请号：US16232184
申请日：2018-12-26
Applicant: RAYTHEON COMPANY
Inventor： Tim P. Johnson , Kyle Heideman , Todd O. Clatterbuck , John Edgecumbe , Fabio Di Teodoro , Maurice J. Halmos
Abstract: Spectral beam combining systems including a multi-element transform optic. In certain examples the multi-element transform optic includes a first cylindrical optical element having positive optical power in a first axis, a second optical element having negative optical power in the first axis, and a third toroidal optical element having positive optical power in the first axis and either positive or negative optical power in a second axis that is orthogonal to the first axis. The first and third optical elements are positioned on opposite sides of the second optical element and equidistant from the second optical element. The multi-element transform optic has an optical path length extending between a front focal plane and a back focal plane that is shorter than an effective focal length of the multi-element transform optic.
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公开(公告)号：US10754038B2
公开(公告)日：2020-08-25
申请号：US16403821
申请日：2019-05-06
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 , G01S7/481 , G01S7/4912 , G01S7/497 , G01S17/66
Abstract: An apparatus includes at least one processor configured to determine a wavefront phase profile of return illumination reflected from a remote object, where the wavefront phase profile is based on interference between Doppler-shifted local oscillator (LO) illumination and the return illumination. The at least one processor is also configured to calculate a wavefront error based on a comparison between (i) the determined wavefront phase profile of the return illumination and (ii) a desired wavefront phase profile of a high energy laser (HEL) beam. The at least one processor is further configured to control a deformable mirror to at least partially compensate the HEL beam for the calculated wavefront error.
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29.发明授权公开(公告)号：US10725156B2
公开(公告)日：2020-07-28
申请号：US15698381
申请日：2017-09-07
Applicant: Raytheon Company
Inventor： Maurice J. Halmos , Joseph Marron , Jae H. Kyung
IPC: G01C3/08 , G01S7/4865 , G01S7/481 , G01S17/58 , G01S17/10 , G01S7/4861 , G01S7/484 , G01S7/487 , G01S7/48
Abstract: A method includes generating a first optical signal containing doublet pulses. Each doublet pulse includes a first pulse and a second pulse. The second pulses of the doublet pulses are in quadrature with the first pulses of the doublet pulses. The method also includes transmitting the first optical signal towards a target and receiving a second optical signal containing reflected doublet pulses from the target. Each reflected doublet pulse includes a first reflected pulse and a second reflected pulse. The method further includes performing in-phase and quadrature processing of the first and second reflected pulses and identifying one or more parameters of the target based on the in-phase and quadrature processing.
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公开(公告)号：US09057605B2
公开(公告)日：2015-06-16
申请号：US13706746
申请日：2012-12-06
Applicant: Raytheon Company
Inventor： Maurice J. Halmos
CPC classification number: G01C3/02 , G01S7/4814 , G01S7/4816 , G01S7/497 , G01S17/003 , G01S17/895
Abstract: In one aspect, ladar system includes a ladar transmitter system and a ladar receiver system configured to receive data from the transmitter. The ladar transmitter system and the ladar receiver system are disposed in a configuration forming a bistatic synthetic aperture ladar system. In one example, the ladar transmitter system is configured to be disposed in a vehicle and the ladar receiver system is configured to be stationary.
Abstract translation: 在一个方面，系统包括发射机系统和被配置为从发射机接收数据的拉达接收机系统。 拉达发射机系统和拉达接收机系统被布置成形成双基合成孔径拉达系统的配置。 在一个示例中，拉达发射机系统被配置为设置在车辆中，并且拉达接收机系统被配置为静止的。
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