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公开(公告)号：US12019189B2
公开(公告)日：2024-06-25
申请号：US16480220
申请日：2018-01-24
Applicant: Analog Devices, Inc.
Inventor： Michael Howard Anderson , Scott Robert Davis , Benjamin Luey
IPC: G01S7/4863 , G01S7/481 , G01S7/4861 , G01S7/487 , G01S17/00 , G01S17/06 , G01S17/42 , G01S17/89
CPC classification number: G01S7/4863 , G01S7/4816 , G01S7/4817 , G01S17/42 , G01S17/89 , G01S7/4861 , G01S7/487 , G01S7/4876 , G01S17/00 , G01S17/06
Abstract: A system and method for providing a dynamic composite field of view in a scanning lidar system, such as to improve a signal-to-noise ration of detected light. The dynamic composite field of view can include a subset of the available detector pixels, and can thereby reduce noise introduce by noise sources that can scale with a detector area, such as dark current and gain peaking that can be caused by a capacitance of the photodetector.
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公开(公告)号：US10684531B1
公开(公告)日：2020-06-16
申请号：US16283229
申请日：2019-02-22
Applicant: Analog Devices, Inc.
Inventor： Michael Ziemkiewicz , Tyler Adam Dunn , Michael Howard Anderson , Scott Robert Davis
Abstract: A light beam can be steered using a non-mechanical beam steerer structure. For example, a combination of sub-aperture and full-aperture beam steering structures can be used (e.g., corresponding to regions of controlled variation in an index of refraction). The sub-aperture elements can include tapered structures defining a saw-tooth or triangular footprint in the plane in which the in-plane steering is performed. Respective rows of sub-aperture tapered structures can be configured to controllably steer the light beam in the first in-plane direction, wherein at least one row of sub-aperture tapered structures defines a first base region edge that is tipped at a first specified in-plane angle relative to a second base region edge defined by another row. Use of the tipped configuration can simplify a configuration of the beam steerer structure, such as allowing a configuration lacking a compensation plate at the input.
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公开(公告)号：US10120261B2
公开(公告)日：2018-11-06
申请号：US15479999
申请日：2017-04-05
Applicant: Analog Devices, Inc.
Inventor： Michael Ziemkiewicz , Scott Robert Davis , Michael Howard Anderson , Tyler Adam Dunn
Abstract: The present subject matter includes apparatus and techniques that can be used to reduce losses in systems that perform steering of a light beam. Such steering can be performed in a non-mechanical manner, such as using an electrically-controlled optical structure (e.g., an electro-optical structure). For example, a waveguide can be used to adjust an angle of a light beam (e.g., steer the light beam). The waveguide can include a core, a cladding including an electro-optic material, and electrodes defining an arrangement that, when selectively energized, adjusts an index of refraction of the electro-optic material. In particular, electrode arrangements as described herein can be used to reduce losses, such as losses that would occur due to diffraction.
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公开(公告)号：US09983355B1
公开(公告)日：2018-05-29
申请号：US15685605
申请日：2017-08-24
Applicant: Analog Devices, Inc.
Inventor： Scott Robert Davis , Shrenik Deliwala , Michael Ziemkiewicz , Derek Gann , Andrew William Sparks , Michael Howard Anderson
CPC classification number: G02B6/262 , G02B6/26 , G02B6/27 , G02B6/2713 , G02B6/35 , G02B6/3536 , G02F1/365
Abstract: An optical coupler can be provided for coupling a light beam into a waveguide. The optical coupler can include a stepped structure, such as to reduce difficulties during manufacture, reduce expenses associated with manufacture, and additionally, to provide an increased acceptance angle of the optical coupler. The waveguide can include a guiding region where a cladding thickness can be increased relative to a coupling region, such as to reduce losses due to evanescent outcoupling in the guiding region.
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公开(公告)号：US11681199B2
公开(公告)日：2023-06-20
申请号：US16543060
申请日：2019-08-16
Applicant: Analog Devices, Inc.
Inventor： Michael Ziemkiewicz , Scott Robert Davis , Michael Howard Anderson , Bennett Sodergren , Radhika Marathe
CPC classification number: G02F1/313 , G01S7/4817 , G01S17/08 , G02B6/00 , G02B6/0001 , G02F1/011 , G02F1/1326 , G02F2/004 , G02F2203/24
Abstract: An optical system for receiving light scanned from different light origination locations in space can include a Liquid Crystal (LC) waveguide (LCW), including first and second LCW light ports. A beamsteering LC electrode can be included in or coupled to the LCW and can be configured to vary a receiving direction of light received at the second LCW light port in response to a varying electrical input signal applied to the LC electrode to scan receiving of light at the second LCW light port from different light origination locations in space. A photodetector can be optically coupled to the first LCW light port, such as to detect waveguided light from different light origination locations in space received in response to the varying electrical input signal applied to the first LC electrode. Ranger, bright-spot locking, laser detection, direct detect and coherent lidar, wavelength detection, and other techniques and use cases are possible.
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Patent Agency Ranking
公开(公告)号：US11169426B2
公开(公告)日：2021-11-09
申请号：US16358529
申请日：2019-03-19
Applicant: Analog Devices, Inc.
Inventor： Michael Ziemkiewicz , Michael Howard Anderson , Tyler Adam Dunn , David Edward Fish , Scott Dennis Rommel , Andrew William Sparks , Scott Robert Davis
IPC: G02F1/295
Abstract: A Liquid Crystal Waveguide (LCW) system can provide sub-aperture incoupling or outcoupling of light having an input wavelength and input beamsize defining an aperture characteristic of the system. A Liquid Crystal Waveguide (LCW) can include a generally planar LCW core to receive light via a light input zone for communication toward a light output zone. Sub-aperture interfacial light couplers can be planarly arranged in or parallel to the planar LCW core in the light input zone or the light output zone. Sub-aperture interfacial light couplers can include teeth, prisms, or facets, a photonic crystal metasurface, or a geometric-phased holograph (GPH)). Overall LCW thickness can be reduced, which can be helpful in space-limited applications or for reducing material costs.
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公开(公告)号：US10133083B1
公开(公告)日：2018-11-20
申请号：US15678741
申请日：2017-08-16
Applicant: Analog Devices, Inc.
Inventor： Michael Ziemkiewicz , Michael Howard Anderson , Scott Robert Davis , Benjamin Luey , Tyler Adam Dunn
Abstract: A non-mechanical beamsteerer can be provided to adjust an angle of a light beam, such as to scan the light beam over a field of regard. The non-mechanical beamsteerer can include a first collection of steering elements that are smaller than a size of a light beam. The first collection of steering elements can adjust the angle of the light beam by diffracting the light beam. The non-mechanical beamsteerer can also include a second collection of steering elements that are larger than a size of the light beam. The second collection of steering elements can adjust an angle of the light beam by refracting the light beam. The non-mechanical beamsteerer can operate without a compensation plate, such as to provide a reduced size of the beamsteerer and an increased acceptance angle of the beamsteerer.
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公开(公告)号：US20210278741A1
公开(公告)日：2021-09-09
申请号：US16543060
申请日：2019-08-16
Applicant: Analog Devices, Inc.
Inventor： Michael Ziemkiewicz , Scott Robert Davis , Michael Howard Anderson , Bennett Sodergren , Radhika Marathe
Abstract: An optical system for receiving light scanned from different light origination locations in space can include a Liquid Crystal (LC) waveguide (LCW), including first and second LCW light ports. A beamsteering LC electrode can be included in or coupled to the LCW and can be configured to vary a receiving direction of light received at the second LCW light port in response to a varying electrical input signal applied to the LC electrode to scan receiving of light at the second LCW light port from different light origination locations in space. A photodetector can be optically coupled to the first LCW light port, such as to detect waveguided light from different light origination locations in space received in response to the varying electrical input signal applied to the first LC electrode. Ranger, bright-spot locking, laser detection, direct detect and coherent lidar, wavelength detection, and other techniques and use cases are possible.
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公开(公告)号：US10976579B2
公开(公告)日：2021-04-13
申请号：US16059731
申请日：2018-08-09
Applicant: Analog Devices, Inc.
Inventor： Michael Ziemkiewicz , Scott Robert Davis , Scott D. Rommel , Benjamin Luey , Michael Howard Anderson , Derek Gann
Abstract: A liquid crystal waveguide (LCW) can include actively controlled incoupling of light into a LCW, such as by using a voltage-controlled electrode to actively vary a property of an LC material arranged to affect the incoupling of light into the LCW. Actively varying light incoupling into the LCW can be used, for example, such as for calibration or compensation or to provide closed-loop feedback such as to stabilize the amount of light into the LCW while accommodating or reducing sensitivity of the LCW to variations in one or more of: input laser light incidence angle, input laser wavelength, LCW or input laser temperature, input laser optical power level, or the like. This can advantageously help improve or maximize light incoupling efficiency, which can improve performance and robustness of the LCW under actual operating conditions. The LCW can be used for, among other things, beamsteering in in-plane and out-of-plane directions.
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公开(公告)号：US20200050034A1
公开(公告)日：2020-02-13
申请号：US16059731
申请日：2018-08-09
Applicant: Analog Devices, Inc.
Inventor： Michael Ziemkiewicz , Scott Robert Davis , Scott D. Rommel , Benjamin Luey , Michael Howard Anderson , Derek Gann
Abstract: A liquid crystal waveguide (LCW) can include actively controlled incoupling of light into a LCW, such as by using a voltage-controlled electrode to actively vary a property of an LC material arranged to affect the incoupling of light into the LCW. Actively varying light incoupling into the LCW can be used, for example, such as for calibration or compensation or to provide closed-loop feedback such as to stabilize the amount of light into the LCW while accommodating or reducing sensitivity of the LCW to variations in one or more of: input laser light incidence angle, input laser wavelength, LCW or input laser temperature, input laser optical power level, or the like. This can advantageously help improve or maximize light incoupling efficiency, which can improve performance and robustness of the LCW under actual operating conditions. The LCW can be used for, among other things, beamsteering in in-plane and out-of-plane directions.
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