中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

369 records (took 0.03 seconds)

    ENERGY HARVESTING DEVICE
    71.
    发明申请
    ENERGY HARVESTING DEVICE 审中-公开

    公开(公告)号：WO2022248277A1

    公开(公告)日：2022-12-01

    申请号：PCT/EP2022/063198

    申请日：2022-05-16

    Applicant: UNIVERSITY OF SOUTHAMPTON

    Inventor： TORBATI, Mohamed

    IPC: H02K7/06 ,  H02K7/18 ,  F03B13/18

    Abstract: An energy harvesting device comprises an input module for receiving input linear vibration. A transmission mechanism comprises an output shaft, and is configured to convert relative linear motion of opposite first and second end parts of the energy harvesting device into rotational motion of the output shaft. A generator module comprises a flywheel fitted to the output shaft, and an electromagnetic generator. The output shaft may comprise a self-reversing leadscrew which is rotated in a unidirectional direction of rotation when a clutch mechanism fitted thereto is translationally moved relative to the output shaft in each of opposite first and second linear directions. Alternatively, the output shaft may comprise a single threaded leadscrew. The electromagnetic generator is driven when a clutch mechanism fitted to the output shaft is translationally moved relative to the output shaft in one linear direction, and a second electromagnetic generator fitted to the clutch mechanism is driven when the clutch mechanism is translationally moved relative to the output shaft in the opposite linear direction. The energy harvesting device may comprise a flywheel having a variable moment of inertia which varies the resonant frequency of the energy harvesting device to broaden the operating bandwidth of the energy harvesting device.

    ATOMIC COOLING AND TRAPPING METHODS AND APPARATUS
    74.
    发明申请
    ATOMIC COOLING AND TRAPPING METHODS AND APPARATUS 审中-公开

    公开(公告)号：WO2022090381A1

    公开(公告)日：2022-05-05

    申请号：PCT/EP2021/079961

    申请日：2021-10-28

    Applicant: UNIVERSITY OF SOUTHAMPTON

    Inventor： DRAGOMIR, Andrei-Aurel ,  HIMSWORTH, Matthew, David

    IPC: G21K1/00

    Abstract: An optical trap for laser cooling and trapping atoms. Three pairs of laser beams are directed to cross in a vacuum chamber at a common intersection volume, wherein each pair is formed by two counterpropagating beams. Rather than having a mutually orthogonal arrangement in which each beam pair forms an angle χ of 45° to a reference axis, z, these angles are instead between 5° ≤ χ ≤ 40°. Moreover, in each beam pair, the counterpropagating beams are not precisely aligned in a common path, as in a conventional magneto-optical trap, but are slightly misaligned by respective misalignement angles [α, β, κ] of typically 0.1° to 2°. The misalignment angles and beam widths are however selected so that a common intersection volume for all six beams is maintained. This provides an all-optical trap in which laser cooling and trapping of atoms takes place without a magnetic field being present.

    MEMS ACTUATION DEVICE AND METHOD
    75.
    发明申请
    MEMS ACTUATION DEVICE AND METHOD 审中-公开

    公开(公告)号：WO2021239243A1

    公开(公告)日：2021-12-02

    申请号：PCT/EP2020/064945

    申请日：2020-05-29

    Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  UNIVERSITY OF SOUTHAMPTON

    Inventor： HOFFMANN, Falk-Martin ,  FAZI, Filippo, Maria ,  WHITE, Neil ,  HOLLAND, Keith ,  HARRIS, Nick ,  FONTANA, Simone ,  GROSCHE, Peter

    IPC: H01L41/09 ,  H04R17/00

    Abstract: An actuation device (100) is disclosed, comprising a support structure (110) and a flexible cantilever beam (101) extending from a first end (101a) fixed to the support structure (110) to a second free end (101b). The flexible cantilever beam (101) comprises a first piezoelectrical portion facing the first fixed end (101a) of the cantilever beam (101) and a second piezoelectrical portion facing the second free end (101b) of the cantilever beam (101). Moreover, the cantilever beam (101) comprises a plurality of electrodes configured to apply a first electrical field to the first piezoelectrical portion and a second electrical field to the second piezoelectrical portion such that, when applying the first electrical field to the first piezoelectrical portion and the second electrical field to the second piezoelectrical portion, the first electrical field forces the first piezoelectrical portion to bend in a first lateral direction (A) and the second electrical field forces the second piezoelectrical portion to bend in a second lateral direction (B) different from the first lateral direction (A), thereby causing lateral movement of the second free end (101b) of the cantilever beam (101). Moreover, a corresponding actuation method is disclosed. Advantageously, the actuation device (100) provides for an improved bending behaviour at the second free end (101b) of the cantilever beam (101).

    METHOD OF FORMING BIREFRINGENT STRUCTURES IN AN OPTICAL ELEMENT
    78.
    发明申请
    METHOD OF FORMING BIREFRINGENT STRUCTURES IN AN OPTICAL ELEMENT 审中-公开

    公开(公告)号：WO2021038225A1

    公开(公告)日：2021-03-04

    申请号：PCT/GB2020/052050

    申请日：2020-08-27

    Applicant: UNIVERSITY OF SOUTHAMPTON

    Inventor： SAKAKURA, Masaaki ,  WANG, Lei ,  KAZANSKY, Peter ,  YU, Yanhao ,  LEI, Yuhao

    IPC: G11B7/0045 ,  G02B5/30

    Abstract: A method of fabricating an optical element comprises: providing a substrate (1, 50) of a transparent material in which is to be formed a plurality of birefringent nanostructures spaced apart in plane substantially parallel to a surface of the substrate in a first direction (2) by a distance X and in a second direction (3) by a distance Y; generating from the output of a source (20) of femtosecond laser pulses a laser beam group comprising a plurality of focussed seeding beams (44) having a circular polarisation and spaced apart along a line by the distance X and a focussed writing beam (26) having a non- circular polarisation and spaced apart from one of the seeding beams by the distance Y or the distance X; directing the laser beam group onto the surface of the substrate at a first position and applying one or more femtosecond laser pulses from each beam to corresponding volumes in the substrate; repeatedly translating the laser beam group relative to the substrate parallel to the line of seeding beams and along the first direction by the distance X to a next position and applying one or more femtosecond laser pulses from each beam, in order to deliver a plurality of femtosecond laser pulses from the seeding beams to each corresponding volume to create substantially optically isotropic nanostructures in the corresponding volumes; translating the laser beam group relative to the substrate along the second direction by the distance Y and repeating the repeated translation and application of the femtosecond laser pulses along the first direction; wherein the relative translation of the laser beam group and the substrate aligns the writing beam with successive corresponding volumes in which substantially optically isotropic nanostructures have been created, so that the one or more femtosecond laser pulses applied from the writing beam transform the optically isotropic nanostructure in each corresponding volume into an optically isotropic nanostructure with optical birefringence.

Patent Agency Ranking