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公开(公告)号：US20240195225A1
公开(公告)日：2024-06-13
申请号：US18421079
申请日：2024-01-24
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Ori Refael Mor , Lior Golan , Ran Sagi , Eyal Conforti
IPC分类号： H02J50/30 , H01L31/0216 , H01L31/054 , H02S40/30
CPC分类号： H02J50/30 , H01L31/02168 , H01L31/0547 , H02S40/30 , Y02E10/52
摘要： A wireless optical power transmission system comprising a transmitter and receiver, the transmitter comprising a laser emitting a beam, a scanning mirror for steering the beam towards said receiver and a control unit receiving signals from a detection unit on the receiver and controlling the beam power and the scanning mirror. The receiver has a photovoltaic cell having a bandgap energy of 0.75-1.2 eV, with a plurality of conductors on a beam receiving surface. A cover layer of material blocking illumination of wavelengths outside that of the laser, is disposed on the photovoltaic cell. The cover layer may have anti-reflective coatings on its top and bottom surfaces. The detection unit thus generates a signal representing the power of the laser beam impinging upon the receiver, independent of illuminations other than that of said laser beam. The control unit thus can maintain the laser power impinging on the receiver.
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公开(公告)号：US11855705B2
公开(公告)日：2023-12-26
申请号：US17203886
申请日：2021-03-17
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Yoni Cohen , Ori Refael Mor , Omer Nahmias , Eitan Ronen , Lior Golan
CPC分类号： H04B10/807 , H01S3/08 , H04B10/69
摘要： A receiver for receiving an incident beam of optical power from a remote transmitter over a predefined field of view, comprising an input lens having a high durability coating that can withstand domestic handling and contamination. Such a high durability coating may reflect a non-insignificant part of the light incident thereon. Behind the lens, there is fitted a retroreflector disposed such that it reflects that part of the incident beam traversing the lens, back through the lens to the transmitter. Reflections from the front surface of the lens impinge on one or more transparent beam catchers appropriately located, and equipped with energy conversion devices, such as photovoltaic cells, to convert light from the reflections of the incident beam into electricity. Additional energy conversion devices may be located inward of the lens, to collect and convert reflections from the inner surface of the lens, of light returning from the retroreflector.
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公开(公告)号：US20220368166A1
公开(公告)日：2022-11-17
申请号：US17773147
申请日：2020-11-01
申请人： Wi-Charge Ltd.
发明人： Lior Golan , Yoav Biderman , Ran Sagi , Ortal Alpert , Ori Refael Mor
摘要： Methods and systems for safely and effectively supplying a beam of wireless power from a transmitter to at least one receiver. A delta signal is generated by repeatedly calculating the difference in power between the power of the beam emitted by the transmitter and the amount of power received at the receiver. The system dynamically generates a time delay, which is a time period shorter than the maximal exposure duration relating to safe exposure durations for the power level of the delta signal. If the time delay is exceeded, the system changes an operational parameter of the system, such as terminating the beam. Because of limitations to building a perfect timing system, the system is built to be more sensitive to time delays having longer safe exposure durations, with large delta signals having short safe exposure durations being responded to immediately and without significant regard to the time delay.
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公开(公告)号：US20220360116A1
公开(公告)日：2022-11-10
申请号：US17745359
申请日：2022-05-16
申请人： Wi-Charge Ltd.
发明人： Yoav Biderman , Ortal Alpert , Ori Refael Mor , Omer Nahmias , Lior Golan , Ran Sagi , Zohar Levin , Alexander Slepoy , Yan Rosh , Eyal Conforti
摘要： A wireless power transmitter system for directing a high energy beam towards receivers fitted with identifying signs. One type of the identifying signs may have asymmetric shape properties, such that their mirror image cannot be matched to their actual shape, even after the image is rotated, tilted or otherwise geometrically manipulated. The system can thus determine whether a detected image of a sign is a true image received directly from said receiver, or is received after the imaged beam has undergone a reflection between the receiver and the transmission system. In the latter case, the system can prevent high power transmission from being directed to a location other than a real receiver, which could be a safety hazard. Other types of identifying signs may be located in or on the borders of different zones of a transmission space, to identify zones where transmission may be allowed or prohibited.
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公开(公告)号：US20210021093A1
公开(公告)日：2021-01-21
申请号：US17034256
申请日：2020-09-28
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Eitan Ronen , Omer Nahmias , Ori Refael Mor , Lior Golan , Ran Sagi
摘要： A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions.
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公开(公告)号：US20200052798A1
公开(公告)日：2020-02-13
申请号：US16658292
申请日：2019-10-21
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Yoni Cohen , Ori Refael Mor , Omer Nahmias , Eitan Ronen , Lior Golan
摘要： A receiver for receiving an incident beam of optical power from a remote transmitter over a predefined field of view, comprising an input lens having a high durability coating that can withstand domestic handling and contamination. Such a high durability coating may reflect a non-insignificant part of the light incident thereon. Behind the lens, there is fitted a retroreflector disposed such that it reflects that part of the incident beam traversing the lens, back through the lens to the transmitter. Reflections from the front surface of the lens impinge on one or more transparent beam catchers appropriately located, and equipped with energy conversion devices, such as photovoltaic cells, to convert light from the reflections of the incident beam into electricity. Additional energy conversion devices may be located inward of the lens, to collect and convert reflections from the inner surface of the lens, of light returning from the retroreflector.
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公开(公告)号：US20190341813A1
公开(公告)日：2019-11-07
申请号：US16511312
申请日：2019-07-15
申请人： Wi-Charge Ltd.
发明人： Alexander Slepoy , Lior Golan , Omer Nahmias , Ran Sagi , Ortal Alpert , Ori Refael Mor
摘要： A system incorporating safety features, for optical power transmission to receivers, comprising an optical resonator having end reflectors and a gain medium, a driver supplying power to the gain medium, and controlling its small signal gain, a beam steering apparatus and a controller to control at least the beam steering apparatus and the driver. The controller responds to a safety risk occurring in the system, by outputting a command to change at least some of the small signal gain of the gain medium, the radiance of the optical beam, the power supplied by the driver, the scan speed or the scan direction and position of the beam steering apparatus, or to register the scan pose which defines the location of said optical-to-electrical power converter. The controller may also ensure a high overall radiance efficiency, and may warn of transmitted power not received by a targeted receiver.
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公开(公告)号：US20190157829A1
公开(公告)日：2019-05-23
申请号：US16257244
申请日：2019-01-25
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Eitan Ronen , Omer Nahmias , Ori Refael Mor , Lior Golan , Ran Sagi
摘要： A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions.
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公开(公告)号：US10193297B2
公开(公告)日：2019-01-29
申请号：US15548229
申请日：2016-02-02
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Eitan Ronen , Omer Nahmias , Ori Refael Mor , Lior Golan , Ran Sagi
摘要： A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions.
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公开(公告)号：US20180019565A1
公开(公告)日：2018-01-18
申请号：US15548229
申请日：2016-02-02
申请人： Wi-Charge Ltd.
发明人： Ortal Alpert , Eitan Ronen , Omer Nahmias , Ori Refael Mor , Lior Golan , Ran Sagi
CPC分类号： H01S3/082 , H01S3/0604 , H01S3/08 , H01S3/08063 , H01S3/0815 , H01S3/0816 , H01S3/0818 , H01S3/105 , H02J50/30
摘要： A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions.
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