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公开(公告)号：US12066574B2
公开(公告)日：2024-08-20
申请号：US17150330
申请日：2021-01-15
Applicant: Raytheon Company
Inventor： Gerald P. Uyeno , Sean D. Keller , Benn H. Gleason
IPC: G01S7/48 , G01S7/481 , G01S7/484 , G01S7/4861 , G01S17/10
CPC classification number: G01S7/4817 , G01S7/484 , G01S7/4861 , G01S17/10
Abstract: Optical systems and methods for object detection and location. One example of an optical system includes a laser radar optical source positioned to emit a pulsed laser beam, a MEMS MMA positioned to scan the beam in a linear scan over a first area of a scene, a laser radar detector positioned to receive and integrate a reflection of the beam, a read-out integrated circuit (ROIC) configured to provide a first read-out signal based on the integrated reflection, and a controller configured to receive the first read-out signal, determine a range to the first area based on a time of flight of the pulsed laser beam, and identify a presence of an object within the scene based on a signal level of the first read-out signal, the first signal level corresponding to a reflectivity of a portion of the object within the first area of the scene. The MEMS MMA being configurable to shape the pulsed laser beam to adjust size, focus or intensity profile or to produce deviations in the wavefront of the beam to compensate for path length differences or atmospheric distortion. The MEMS MMA being configurable to produce and independently steer a plurality of pulsed laser beams of the same or different wavelengths.
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公开(公告)号：US12025790B2
公开(公告)日：2024-07-02
申请号：US17177755
申请日：2021-02-17
Applicant: Raytheon Company
Inventor： Sean D. Keller , Gerald P. Uyeno , Benn H. Gleason
CPC classification number: G02B26/0833 , G01S7/4817 , G01S7/4813
Abstract: An active situational sensor uses a Micro-Electro-Mechanical System (MEMS) Micro-Mirror Array (MMA) to steer an optical beam to different off-axis sections of a parabolic mirror, an “OAP”, to re-direct and focus optical radiation into a spot-beam onto a conical shape of a fixed mirror, which redirects the spot-beam to scan a FOR. The sensor may rapidly scan a 360° horizontal FOR with a specified vertical FOR or any portion thereof, move discretely between multiple specific objects per frame, vary the dwell time on an object or compensate for other external factors to tailor the scan to a particular application or changing conditions in real-time. The MEMS MMA may be configurable to shape the spot-beam to adjust size, focus or intensity profile or to produce deviations in the wavefront of the spot-beam to compensate for path length differences or atmospheric distortion. The MEMS MMA being configurable to produce and independently steer a plurality of spot-beams of the same or different wavelengths.
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公开(公告)号：US11686820B2
公开(公告)日：2023-06-27
申请号：US17071767
申请日：2020-10-15
Applicant: Raytheon Company
Inventor： Sean D. Keller , Gerald P. Uyeno
IPC: G01S7/481 , G01S17/86 , G02B5/00 , G02B17/00 , G02B26/08 , G02B27/09 , G02B19/00 , G02B26/00 , H04N23/54 , H04N23/55 , H04N23/56 , F41G7/22
CPC classification number: G01S7/4813 , G01S17/86 , G02B5/001 , G02B17/004 , G02B19/0047 , G02B26/008 , G02B26/0833 , G02B27/0955 , G02B27/0977 , H04N23/54 , H04N23/55 , H04N23/56 , F41G7/2246 , F41G7/2253
Abstract: Optical sensors and particularly gimbaled optical sensors transmit an active signal at a given wavelength(s) and receive passive signals over a range of wavelengths and the active signal in a common aperture. The sensor includes a Tx/Rx Aperture Sharing Element (ASE) configured with an annular region that couples an active signal having a ring-shaped energy distribution to the telescope for transmission and a center region that couples the passive emissions and the returned active signal to the detector. A beam shaping element such as an Axicon lens, LCWG, Risley Prism, Unstable Optical Resonator or MEMS MMA may be used to form or trace the ring-shaped active signal onto the annular region of the ASE. A focusing optic may be used to reduce the divergence of the active signal so that it is collimated or slightly converging when transmitted such that the returned active signal approximates a spot. A filter wheel may be positioned behind the ASE to present separate passive and active images to the detector. These optical sensors may, for example, be used with guided munitions or autonomous vehicles.
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24.发明申请公开(公告)号：US20220342201A1
公开(公告)日：2022-10-27
申请号：US17238147
申请日：2021-04-22
Applicant: Raytheon Company
Inventor： Benn H. Gleason , Gerald P. Uyeno , Sean D. Keller
Abstract: A steerable laser transmitter pairs a MEMS MMA with an optical amplifier to provide a high-power steered laser beam over a wide FOR. A single MEMS MMA may be positioned downstream of the optical amplifier. In a two-stage architecture, a MEMS MMA provides continuous fine steer upstream of the optical amplifier and a beam steerer, another MEMS MMA or a QWP and stack of switchable PGs, provides discrete coarse steering downstream. In the two-stage architecture, the upstream MEMS MMA is configured to limit its steering range to the acceptance angle of the optical amplifier, at most ±2°×±2°. The MEMS MMA may include piston capability to shape the wavefront of the beam.
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公开(公告)号：US20220311961A1
公开(公告)日：2022-09-29
申请号：US17211574
申请日：2021-03-24
Applicant: Raytheon Company
Inventor： Paul R. Spyak et al. , Gerald P. Uyeno , Benn H. Gleason , Sean D. Keller
Abstract: A passive imaging sensor includes a plurality of optical elements in which at least one includes one or more Micro-Electro-Mechanical System (MEMS) Micro-Mirror Arrays (MMAs) having a plurality of independently and continuously controllable mirrors that at least tip and tilt in 2 DOF and may tip, tilt and piston in 3 DOF. In an operational mode, the mirrors are tipped and tilted, and possibly pistoned, such that the optical radiation is focused at the pixelated detector to read out an image of the scene. NUC coefficients such as offset and/or gain are applied to either the output signals of the detector or to the image to form the NUC'd images. In a calibration mode, the mirrors are tipped and tilted and/or pistoned to spatially or temporally blur the image or to re-direct the FOV to one or more on-board calibration sources to generate a uniform image from which to calculate and update the NUC coefficients.
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Patent Agency Ranking
公开(公告)号：US20220260685A1
公开(公告)日：2022-08-18
申请号：US17177784
申请日：2021-02-17
Applicant: Raytheon Company
Inventor： Sean D. Keller , Gerald P. Uyeno , Benn H. Gleason
Abstract: An active situational sensor uses a beam steerer to steer a spot-beam onto a conical shape of a fixed mirror oriented along an optical axis to scan a FOR. The sensor may rapidly scan a 360° horizontal FOR with a specified vertical FOR or any portion thereof, move discretely between multiple specific objects per frame, vary the dwell time on an object or compensate for other external factors to tailor the scan to a particular application or changing conditions in real-time. The fixed mirror includes a MEMS MMA that approximates the conical shape of the mirror. The MEMS MMA being configurable to extend the vertical FOR or shape the spot-beam to adjust size, focus or intensity profile or to produce deviations in the wavefront of the spot-beam to compensate for path length differences or atmospheric distortion. The MEMS MMA being configurable to produce and independently steer a plurality of spot-beams of the same or different wavelengths.
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27.发明申请公开(公告)号：US20220236383A1
公开(公告)日：2022-07-28
申请号：US17159967
申请日：2021-01-27
Applicant: Raytheon Company
Inventor： Gerald P. Uyeno , Sean D. Keller , Benn H. Gleason
Abstract: An active situational sensor uses a Micro-Electro-Mechanical System (MEMS) Micro-Mirror Array (MMA) in which the mirrors approximate an off-axis section of a parabolic surface, an “OAP”, to re-direct and focus optical radiation onto a conical shape of a fixed mirror oriented along an optical axis. The mirrors tip, tilt and piston to further focus and steer the spot-beam around the conical shape of the fixed mirror, which redirects the spot-beam to scan a FOR. The sensor may rapidly scan a 360° horizontal FOR with a specified vertical FOR or any portion thereof, jump discretely between multiple specific objects per frame, vary the dwell time on an object or compensate for other external factors to tailor the scan to a particular application or changing real-time conditions. The MEMS MMA being configurable to shape the spot-beam to adjust size, focus or intensity profile or to produce deviations in the wavefront of the spot-beam to compensate for path length differences or atmospheric distortion. The MEMS MMA being configurable to produce and independently steer a plurality of spot-beams of the same or different wavelengths.
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28.发明申请公开(公告)号：US20220121035A1
公开(公告)日：2022-04-21
申请号：US17071729
申请日：2020-10-15
Applicant: Raytheon Company
Inventor： Eric Rogala , Garret A. Odom , Gerald P. Uyeno , Sean D. Keller , Benn H. Gleason
Abstract: Optical sensors and particularly gimbaled optical sensors transmit an active signal at a given wavelength(s) and receive passive signals over a range of wavelengths and the active signal in a common aperture. The sensor includes a Tx/Rx Aperture Sharing Element (ASE) configured with a center region that couples the active signal to the telescope for transmission and an annular region that couples the passive emissions and the returned active signal to the detector. A filter wheel may be positioned behind the ASE to present separate passive and active images to the detector. These optical sensors may, for example, be used with guided munitions or autonomous vehicles.
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公开(公告)号：US20220059933A1
公开(公告)日：2022-02-24
申请号：US17001125
申请日：2020-08-24
Applicant: Raytheon Company
Inventor： Gerald P. Uyeno , Sean D. Keller , Benn H. Gleason
Abstract: An optical true time delay (TTD) control device for controllably alters the transit time of an optical beam traveling through the device by using the tip & tilt capability of MEMS MMAs to control the entrance and exit angles to a reflection cavity to coarsely control the path length and transit time and the piston capability to fine tune the path length and transit time. The reflection cavity can be configured in one, two or three dimensions with or without an optically transparent solid medium and using additional MEMS MMAs to provide controllable mirror surfaces within the cavity to enhance dynamic range and tenability. The input MEMS MMA may be “segmented” to re-direct a plurality of channel optical beams from the cavity at the same or different exit angles. The segments may be coated with different AR coatings to provide channel optical beams at different wavelengths.
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公开(公告)号：US11233326B2
公开(公告)日：2022-01-25
申请号：US16837654
申请日：2020-04-01
Applicant: Raytheon Company
Inventor： Sean D. Keller , Gerald P. Uyeno , David G. Manzi , Benn Gleason
Abstract: An optical feed network (OFN) for an RF phased antenna array includes a single free-space optical beamformer that supports all of the RF electrical feed signals for the RF phased antenna array to steer an RF beam. The free-space optical beamformer can more easily scale to accommodate larger array sizes than either the discrete fiber channel or PIC implementations. Furthermore, certain embodiments of the optical beamformer avoid the complexity of having to compute FFTs for each channel to steer the beam, instead relying on the inherent function of an imaging lens to perform the FFT, which in turn facilitates rapid steering.
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