公开(公告)号：US20140153097A1

公开(公告)日：2014-06-05

申请号：US14115300

申请日：2012-05-03

Applicant: UNIVERSITY OF SOUTHAMPTON

Inventor： Martynas Beresna ,  Peter Kazansky

IPC: G02B5/30

CPC classification number: G02B5/3083 ,  G02B5/1809 ,  G02B27/286

Abstract: This patent describes an optical element, which converts incident linearly or circularly polarized visible light into radially or azimuthally polarized light beam. The polarization converter is a single optical element, produced by direct laser writing technique in an optically transparent substrate. Direct laser writing based on ultra-short pulsed laser radiation forms form birefringence self-assembled nanogratings in optically transparent material, such as fused silica. The period of gratings is smaller than wavelengths of a visible light.

Abstract translation: 该专利描述了一种光学元件，其将入射的线性或圆偏振的可见光转换成径向或方位偏振的光束。 偏振转换器是通过直接激光写入技术在光学透明基板中产生的单个光学元件。 基于超短脉冲激光辐射的直接激光写入在诸如熔融二氧化硅的光学透明材料中形成双折射自组装纳米光栅。 光栅的周期小于可见光的波长。

公开(公告)号：US20250147296A1

公开(公告)日：2025-05-08

申请号：US18832643

申请日：2023-02-03

Applicant: University of Southampton ,  The Marine Biological Laboratory

Inventor： Michael Shribak ,  Peter Kazansky

IPC: G02B21/00 ,  G02B21/36

Abstract: A polarized light microscope includes a light source configured to illuminate a specimen and an imaging sensor configured to capture an image of the specimen. The polarized light microscope also includes a first circular polarizer positioned between the light source and the specimen. A birefringent mosaic mask is positioned between the specimen and the imaging sensor. The polarized light microscope also includes a second polarizer positioned between the mask and the imaging sensor.

公开(公告)号：US11929586B2

公开(公告)日：2024-03-12

申请号：US17181414

申请日：2021-02-22

Applicant: University of Southampton

Inventor： Masaaki Sakakura ,  Yanhao Yu ,  Peter Kazansky ,  Lei Wang

IPC: H01S3/00 ,  B23K26/0622

CPC classification number: H01S3/0057 ,  B23K26/0624

Abstract: A method of delivering optical energy to a substrate comprises applying a temporal group of optical pulses to a region of the substrate, wherein the temporal group comprises twenty or fewer pulses of a femtosecond pulse duration, arranged as a first subgroup of pulses comprising up to three pulses followed by a second subgroup of pulses comprising the remaining pulses in the temporal group; and wherein energies of the pulses are controlled such that pulses in the first subgroup have a first energy per pulse and pulses in a second subgroup of pulses have a second energy per pulse which is less than the first energy.

公开(公告)号：US12265245B2

公开(公告)日：2025-04-01

申请号：US17628998

申请日：2020-08-27

Applicant: University of Southampton

Inventor： Masaaki Sakakura ,  Lei Wang ,  Peter Kazansky ,  Yanhao Yu ,  Yuhao Lei

IPC: G11B7/09 ,  C03C23/00 ,  G02B5/30 ,  G11B7/0045 ,  G02B5/32

Abstract: A method of fabricating an optical element includes providing a substrate of a transparent material in which is to be formed a plurality of birefringent nanostructures spaced apart; generating from the output of a source of femtosecond laser pulses a laser beam group comprising a plurality of focused seeding beams having a circular polarisation; 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; translating the laser beam group relative to the substrate and repeating the repeated translation and application of the femtosecond laser pulses; wherein the relative translation of the laser beam group and the substrate aligns the writing beam with successive corresponding volumes.

公开(公告)号：US12040585B2

公开(公告)日：2024-07-16

申请号：US17181472

申请日：2021-02-22

Applicant: University of Southampton

Inventor： Masaaki Sakakura ,  Yanhao Yu ,  Peter Kazansky ,  Lei Wang

IPC: G11B7/0037 ,  B23K26/0622 ,  B23K26/08 ,  B23K26/082 ,  G01N21/95 ,  G02B5/30 ,  G02B26/08 ,  G02B27/09 ,  G02F1/33 ,  G11B7/127 ,  H01S3/00 ,  B82Y10/00

CPC classification number: H01S3/0057 ,  B23K26/0624 ,  B23K26/08 ,  B23K26/082 ,  B23K26/083 ,  G02B5/3083 ,  G02B26/0808 ,  G02B27/0944 ,  G02F1/33 ,  B82Y10/00

Abstract: A method of delivering optical pulses to a substrate comprises directing a focused beam from a source of optical pulses along a propagation direction onto a substrate; moving the substrate relative to the beam in a plane substantially orthogonal to the propagation direction and continuously along a first direction that includes spaced apart row locations on the substrate, and delivering a plurality of optical pulses from source as the beam reaches each row location; and between delivering the optical pulses at consecutive row locations, moving the beam relative to the substrate in one or more successive discrete movements along a second direction in the plane orthogonal to the first direction, to direct the beam to one or more spaced apart column locations on the substrate, and delivering a plurality of optical pulses from the source at each column location.

公开(公告)号：US11802993B2

公开(公告)日：2023-10-31

申请号：US16970242

申请日：2019-02-13

Applicant: University of Southampton

Inventor： Rokas Drevinskas ,  Peter Kazansky ,  Ausra Cerkauskaite

IPC: G02B1/00 ,  G02B5/30 ,  G02B27/28

CPC classification number: G02B1/002 ,  G02B5/3083 ,  G02B27/286

Abstract: An optical element for modifying an incident laser beam propagated through the optical element from an input face to an output face via a geometric phase birefringent effect, the optical element comprising: a substrate of a transparent amorphous material with an input face and an opposite output face; and a structural modification in a volume of the substrate between the input face and output face comprising a plurality of randomly positioned nanostructures; wherein each nanostructure has a oblate spheroidal shape with an elliptical cross section in a plane parallel to the input face, the elliptical cross-section having a minor axis substantially not larger than 30 nm and a major axis greater than the minor axis, and each nanostructure having a length in a direction perpendicular to the input face which is substantially not larger than 100 nm.