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公开(公告)号：US10578831B2
公开(公告)日：2020-03-03
申请号：US15922724
申请日：2018-03-15
摘要： In some embodiments, a catadioptric optical system (CDOS) including a centrally obscured reflective telescope is disclosed, which includes: a telescope compartment defining a telescope space therein, a primary reflector including a central opening and a secondary reflector. The reflectors are located in the telescope compartment. The CDOS also includes a mechanism for reducing temperature gradient in the telescope space. The mechanism includes an air duct including a first opening and a second opening; a hollow enclosure including side openings and one or more airflow generation devices. The mechanism is configured for forming an air passageway between the airflow generation device and the inner telescope space via the air duct and hollow enclosure located therebetween, for reducing internal air temperature gradient in the telescope space.
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公开(公告)号：US12026808B2
公开(公告)日：2024-07-02
申请号：US18391704
申请日：2023-12-21
发明人： Uriel Ankor , Michael Gilichinsky
CPC分类号： G06T11/001 , G06V20/194 , H04N23/10
摘要： The presently disclosed subject matter aims to a system and method directed to artificially color images acquired from image acquisition channels, cameras, imaging systems (such as, multispectral image acquisition systems, hyperspectral image acquisition systems, etc.) and the like, and present them as pseudo-Red, Green, and Blue (RGB) images to a user.
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公开(公告)号：US12011778B2
公开(公告)日：2024-06-18
申请号：US17686894
申请日：2022-03-04
发明人： Ran Zvi Marom , Ofer Gayer , Rina Cohen
IPC分类号： B23K26/03 , B23K26/062
CPC分类号： B23K26/032 , B23K26/0344 , B23K26/062
摘要： Embodiments pertain to a system for controlling outputting of light towards objects, the system comprising a detection subsystem configured to detect, for at least one object, one or more values of object characteristics, the object characteristics comprising, at least, electromagnetic absorption characteristics, wherein detection of object characteristic values is performed such that the object remains structurally intact; a light source subsystem comprising at least one light source for generating output light and directing the output light towards an object; and a controller configured to control, based on the detected object characteristics values, at least one operational parameter value of the at least one light source such that at least some of the output light that is directed towards the object has electromagnetic characteristics that correspond to the detected values of the electromagnetic absorption characteristics of the object, in order to structurally change at least part of the respective object.
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公开(公告)号：US11909167B2
公开(公告)日：2024-02-20
申请号：US18315501
申请日：2023-05-11
发明人： Zeev Schiffer , Andrey Nazarov , Daniel Levy
CPC分类号： H01S3/1307 , G02F1/01 , G02F1/0136 , H01S3/101 , H01S3/10053 , H01S3/10061 , H01S3/1304 , H01S3/1305 , H01S3/136 , H01S3/1308
摘要： Multi-Channels coherent beam combining (CBC) using a mechanism for phase and/or polarization locking that uses a reference optical beam and an array of optical detectors each detector being configured and located to detect overall intensity of an optical interference signal caused by interfering of the reference beam and a beam of the respective channel, where the fast intensity per-channel detection allows simultaneous and quick phase/polarization locking of all channels for improving beam combining system performances.
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公开(公告)号：US11191142B2
公开(公告)日：2021-11-30
申请号：US16762366
申请日：2018-11-08
IPC分类号： H05B45/345 , H05B45/325 , H05B45/335 , H02J7/00
摘要： A current regulator for a pulsed load is provided herein. The current regulator may include: an input power source; a current sense circuit; a capacitive energy storage device; a current sink driver; a current source charger which receives input current from the input power source via the current sense circuit and provides a charge for the capacitive energy storage device coupled between the current source charger and the current sink driver which drives the pulsed load; a power monitor circuitry which generates a feedback signal, based on a function of the input power and a function of at least one of: voltage across the capacitive energy storage, or voltage across the current sink driver; and a pulse width modulation (PWM) or pulse frequency modulation (PFM) circuitry which controls the current source charger based on the feedback signal.
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公开(公告)号：US11146035B2
公开(公告)日：2021-10-12
申请号：US17261987
申请日：2019-07-04
发明人： Grigor Hovhannisyan , Zachary Sacks , Asaf Turm
摘要： The present invention provides an active fiber package for use in a fiber laser, amplifier, or ASE source comprising: a plate-shape base comprising a groove having a configuration of at least two spirals for receiving and fixedly holding an active fiber therein, said at least two spirals are coplanar enabling visibility of said active fiber, the outer loop of one spiral transitioning smoothly to the outer loop of another spiral, and the inner loop of each one of said spirals transitioning smoothly into a relatively short straight section; wherein a portion of said straight section of one of said spirals spliced to a coupling fiber, and wherein multiple inner loops of each one of said spirals in proximity to said straight section having a relatively low radius of curvature for enabling tight coiling of said active fiber, thus, for reducing thermal modal instability (TMI) and increasing lasing power.
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公开(公告)号：US20200267815A1
公开(公告)日：2020-08-20
申请号：US16762366
申请日：2018-11-08
IPC分类号： H05B45/345 , H05B45/325 , H05B45/335 , H02J7/00
摘要： A current regulator for a pulsed load is provided herein. The current regulator may include: an input power source; a current sense circuit; a capacitive energy storage device; a current sink driver; a current source charger which receives input current from the input power source via the current sense circuit and provides a charge for the capacitive energy storage device coupled between the current source charger and the current sink driver which drives the pulsed load; a power monitor circuitry which generates a feedback signal, based on a function of the input power and a function of at least one of: voltage across the capacitive energy storage, or voltage across the current sink driver; and a pulse width modulation (PWM) or pulse frequency modulation (PFM) circuitry which controls the current source charger based on the feedback signal.
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公开(公告)号：US10651622B2
公开(公告)日：2020-05-12
申请号：US16327866
申请日：2017-08-23
发明人： Grigor Hovhannisyan , Zachary Sacks
摘要： Fiber lasers and methods are provided, in which the modal instability threshold is raised to provide more laser power. Fiber lasers comprise an active optical fiber having at least one absorption peak wavelength (λpeak) and capable of supporting more than a fundamental mode during operation, and a plurality of pump diodes connected to deliver radiation emitted thereby into the optical fiber. At least one of the pump diodes is a wavelength-locked (WL) diode and at least one of the pump diodes is configured to deliver radiation at at least λ≠λ(not necessarily the same diode(s)). The pump diodes may comprise any of WL diode(s) at λ≠λpeak, WL diode(s) at λ=λpeak and non-WL diode(s). Pumping radiation off the fiber's absorption peak increases the modal instability threshold, most likely by reducing the temperature gradient in the active fiber at the fiber pump entrance point and along the fiber.
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公开(公告)号：US20190288481A1
公开(公告)日：2019-09-19
申请号：US16463248
申请日：2017-11-30
发明人： Zachary SACKS , Boaz LISSAK , Ofer GAYER
IPC分类号： H01S3/30 , H01S3/094 , H01S3/10 , H01S3/23 , H01S3/0941
摘要： Depolarized fiber lasers and respective methods are provided for increasing the SBS (stimulated Brillouin scattering) threshold. The laser source is constructed by a frequency-broadened seed source having a frequency bandwidth of less than 50 GHz, and the depolarization of the seed source is carried out at time scales shorter than 10 ns. At least one amplifier is configured to receive and amplify radiation from the frequency-broadened seed source and deliver the amplified radiation in the optical fiber. Depolarization may be achieved in various ways (e.g., using an interferometer with added length to one arm) and is kept at time scales shorter than tens of nanoseconds, typically shorter than 5-10 ns, which distinguish it from random polarization having polarization changes at longer time scales. Polarization maintaining fibers may be used to further increase the SBS by separating the polarizations states.
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公开(公告)号：US09894292B2
公开(公告)日：2018-02-13
申请号：US13978054
申请日：2013-05-05
发明人： Shalom Binder , Dov Frieman , Avishay Nachum
摘要： Apparatus for increasing resolution of cryogenically cooled vacuum-sealed infrared imaging detector. A two-dimensional detector array of photosensitive pixels is successively exposed to an image scene, acquiring multiple imaging samples. A masking filter, disposed between the detector array and image scene focal plane, is maintained at a fixed position with respect to the detector array, and reduces the region of pixels collecting incident radiation for each imaging sample such that only a portion of each pixel area of the image scene is imaged onto the corresponding detector array pixel. Shifting means successively shifts the optical path of the image scene relative to the masking filter, by a shifting increment or fill-factor reduction amount equal to a fraction of the array pixel width, to image different sub-pixel regions in each imaging sample. A processor reconstructs an image frame having a resolution greater than the intrinsic detector resolution by the fill-factor reduction amount.
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