公开(公告)号：US12007274B2

公开(公告)日：2024-06-11

申请号：US17292659

申请日：2018-11-08

Applicant: SPHERE ULTRAFAST PHOTONICS SA

Inventor： Miguel Nicolau Da Costa Ribeiro De Miranda ,  Chen Guo ,  Maïté Louisy ,  Cord Louis Arnold ,  Anne Genevieve L'Huillier Wahlstrom

IPC: G01J11/00 ,  G01R29/08

CPC classification number: G01J11/00 ,  G01R29/08

Abstract: The present disclosure relates to laser systems and laser pulse measurement methods. The method comprises a dispersive system for applying a controlled chirp, to an incoming ultrashort light pulse to be measured; an optical system for selecting an homogeneous part of the transverse spatial beam profile of said light pulse; applying different spectral phases to different spatial parts of the beam obtained in the previous step, which comprises allowing different spatial parts of the beam to cross different thicknesses of material; focusing or propagating the beam in a nonlinear medium after applying the spectral phases; applying a nonlinear process to the pulse to be characterized for each spatial part of the beam, allowing the generation of a nonlinear signal for each spatial part of the beam; measuring the corresponding bi-dimensional data set that has the information on the nonlinear signal generated for each applied spectral phase in a detector; applying a numerical iterative algorithm to the measured data set to retrieve the spectral phase of the pulse to be characterized; such process being done in a parallel fashion.

公开(公告)号：US11892350B2

公开(公告)日：2024-02-06

申请号：US17276791

申请日：2019-07-19

Applicant: KONICA MINOLTA, INC.

Inventor： Satoshi Masuda

IPC: G01J11/00 ,  G01J1/44

CPC classification number: G01J11/00 ,  G01J1/44

Abstract: A device for measuring two-dimensional flicker of the present application includes a plurality of two-dimensional sensors having a partial readout function of reading out only a pixel value of some of photoelectric conversion elements included in set partial readout regions, among a plurality of photoelectric conversion elements. In the device for measuring two-dimensional flicker, a plurality of measurement regions are set two-dimensionally on a measurement target object. Each pixel in the plurality of measurement regions is individually acquired, by setting each of the plurality of partial readout regions of the plurality of two-dimensional sensors in each of a plurality of partial imaging regions obtained by dividing an entire imaging region including entirely the measurement target object. A flicker value of the plurality of measurement regions is individually obtained based on each pixel value in the plurality of measurement regions.

公开(公告)号：US11792381B2

公开(公告)日：2023-10-17

申请号：US16806691

申请日：2020-03-02

Applicant: California Institute of Technology

Inventor： Lihong Wang ,  Taewoo Kim ,  Jinyang Liang ,  Liren Zhu

IPC: H04N13/161 ,  H04N13/25 ,  H04N13/254 ,  H04N13/282 ,  G01S7/481 ,  G01S7/4865 ,  G01S17/894 ,  H04N23/72 ,  G02B5/04 ,  G01J11/00 ,  G01J9/00 ,  G02B21/10

CPC classification number: H04N13/161 ,  G01S7/4814 ,  G01S7/4865 ,  G01S17/894 ,  H04N13/25 ,  H04N13/254 ,  H04N13/282 ,  H04N23/72 ,  G01J9/00 ,  G01J2011/005 ,  G02B5/04 ,  G02B21/10

Abstract: Disclosed herein are systems and methods of phase-sensitive compressed ultrafast photography (pCUP). In some embodiments, a pCUP system comprises: a dark-field imaging system, and a compressed ultrafast photography (CUP system). The dark-field imaging system may comprise a laser source configured to illuminate the subject with a laser pulse; and a beam block configured to pass laser light scattered by the subject as a first series of phase images and block laser light not scattered by the subject. The CUP system may comprise: a spatial encoding module configured to receive the first series of phase images and to produce a second series of spatially encoded phase images; and a streak camera configured to receive the second series of spatially encoded phase images, to deflect each spatially encoded phase image by a temporal deflection distance, and to integrate the deflected phase images into a single raw CUP image.

公开(公告)号：US11782078B2

公开(公告)日：2023-10-10

申请号：US17312430

申请日：2018-12-25

Applicant: ASELSAN ELEKTRONIK SANAYI VE TICARET ANONIM SIRKETI

Inventor： Ismail Ugur

IPC: G01R21/133 ,  G01J11/00 ,  H03F3/21

CPC classification number: G01R21/133 ,  G01J11/00 ,  H03F3/21 ,  H03F2200/451

Abstract: A measurement method and apparatus for determining power levels of pulsed power signals, wherein the pulsed power signals are needed for some applications with a high dynamic range and a high speed simultaneously. The apparatus and the measurement method particularly used to evaluate a performance of fiber optic sensors, optical pulse generators, switching devices and debugging other pulsed power systems.

公开(公告)号：US20230213384A1

公开(公告)日：2023-07-06

申请号：US18008257

申请日：2021-06-22

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi KONISHI ,  Ryohei KAMIKAWA ,  Yu YAMASAKI

IPC: G01J3/12 ,  G01J11/00 ,  H04B10/67

CPC classification number: G01J3/12 ,  G01J11/00 ,  H04B10/67

Abstract: An optical signal detection system includes: a nonlinear converter that nonlinearly converts a plurality of first optical signals into a plurality of second optical signals, and also a third optical signal into a fourth optical signal; a spectrometer that obtains each of a plurality of first spectral data items from a different one of the plurality of second optical signals, and also a third spectral data item from the fourth optical signal; and a detection device that detects the third optical signal and outputs a detection result. The detection device includes: an analyzer that performs sparse principal component analysis on the plurality of first spectral data items to generate a plurality of second spectral data items; and a detector that compares the third spectral data item with each of the plurality of second spectral data items, and detects the third optical signal based on the result of the comparison.

公开(公告)号：US11366012B2

公开(公告)日：2022-06-21

申请号：US16583736

申请日：2019-09-26

Applicant: INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE (INRS)

Inventor： Jose Azana ,  Konatham Saikrishna Reddy ,  Reza Maram ,  Hugues Guillet De Chatellus

IPC: G01J3/28 ,  G02B6/02 ,  G01J11/00

Abstract: A method and a system for generating a time-frequency representation of an aperiodic continuous input signal comprising generating a periodic train of short pulses having a repetition frequency, and sampling the signal temporally using the periodic train of short pulses to obtain a temporally sampled signal, the temporally sampled signal comprising a plurality of sampled copies of the input signal, each sampled copy being spaced in function of the repetition frequency of the periodic train of short pulses. The temporally sampled signal is delayed based on the repetition frequency to obtain a delayed temporally sampled signal comprising a plurality of delayed sampled copies, a spectral representation of a given delayed sampled copy being delayed in function of the repetition frequency. The delayed temporally sampled signal is evaluated over consecutive time slots to obtain, for each consecutive time slot, a respective output signal in the time-frequency domain.

公开(公告)号：US20220155153A1

公开(公告)日：2022-05-19

申请号：US17428408

申请日：2020-03-06

Applicant: Sony Semiconductor Solutions Corporation

Inventor： Hongbo Zhu ,  Kazuki Hizu ,  Takafumi Takatsuka ,  Yusuke Oike ,  Jun Ogi ,  Yoshiaki Tashiro

IPC: G01J11/00 ,  G01J1/44 ,  H03K23/58

Abstract: A light-receiving apparatus (1a) includes a counting unit (11), a setting unit (12), and an acquiring unit (13). The counting unit is configured to measure a detection number of times that represents the number of times incidence of a photon to a light-receiving element has been detected within an exposure period and to output a counted value. The setting unit is configured to set a cycle of updating time information in accordance with an elapsed time during the exposure period. The acquiring unit is configured to acquire the time information indicating a time at which the counted value reaches a threshold before the exposure period elapses.

公开(公告)号：US11336071B2

公开(公告)日：2022-05-17

申请号：US16161902

申请日：2018-10-16

Applicant: Lumentum Operations LLC

Inventor： Tobyn VanVeghten ,  Joseph J. Alonis ,  James J. Morehead ,  Loren A. Eyres

IPC: H01S3/11 ,  H01S3/094 ,  G01J11/00 ,  H01L27/146 ,  H01L25/16 ,  G01J1/02 ,  G01J1/18 ,  G01J1/42

Abstract: A device may determine at least one metric related to a plurality of laser pulses associated with a Q-switched laser. The device may determine a statistical metric for the at least one metric related to the plurality of laser pulses. The device may determine that the statistical metric satisfies a threshold level of deviation of the at least one metric related to the plurality of laser pulses from a baseline value for the at least one metric. The device may indicate laser degradation of the Q-switched laser based on determining that the statistical metric satisfies the threshold.

公开(公告)号：US11313668B2

公开(公告)日：2022-04-26

申请号：US17223379

申请日：2021-04-06

Applicant: East China Normal University

Inventor： Shi'an Zhang ,  Dalong Qi ,  Chengzhi Jin ,  Yilin He ,  Chengshuai Yang ,  Fengyan Cao ,  Yunhua Yao ,  Yan Yang ,  Zhenrong Sun

IPC: G01B9/02015 ,  G01B9/02 ,  G01B9/0209 ,  G01J11/00

Abstract: The present disclosure provides a compressed ultrafast imaging velocity interferometer system for any reflector, comprising a light source and target system, an etalon interference system, a compressed ultrafast imaging system, a timing control system and a data processing system. An imaging device in the traditional imaging velocity interferometer system for any reflector is replaced by a compressed ultrafast imaging system, a compressed ultrafast Photography (CUP) is introduced in an imaging process, multi-frame images, i.e. three-dimensional images for two-dimensional space and one-dimensional time, are reconstructed via a single measurement by a CUP-VISAR two-dimensional ultrafast dynamic image imaging, a complete dynamic process of a two-dimensional interference fringes image is restored, and spatiotemporal evolution information of a shock wave is effectively acquired, improving an imaging performance of the imaging velocity interferometer system for any reflector in dimension, and achieving a goal that could not be achieved before.

公开(公告)号：US20220011101A1

公开(公告)日：2022-01-13

申请号：US17384053

申请日：2021-07-23

Applicant: Trimble AB

Inventor： Johan Carlén ,  Mikael Nordenfelt ,  Christian Grässer

IPC: G01C1/04 ,  G01C15/00 ,  G01C15/06 ,  G01J11/00 ,  G01S19/51

Abstract: The present disclosure provides a method for determining a direction to a geodetic target from a geodetic instrument. The method includes emitting an optical pulse from the geodetic target, capturing a first image and a second image of the geodetic target using a camera arranged at the geodetic instrument, obtaining a difference image between the first image and the second image, and determining a direction to the geodetic target from the geodetic instrument based on the position of the optical pulse in the difference image. The method further includes synchronizing the geodetic instrument and the geodetic target for emitting the optical pulse concurrently with the capturing of the first image and nonconcurrently with the capturing of the second image. The present disclosure also provides a geodetic instrument, a geodetic target and a geodetic surveying system.