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    Apparatus for measuring the profile of a laser beam
    21.
    发明授权
    Apparatus for measuring the profile of a laser beam 失效
    用于测量激光束轮廓的装置

    公开(公告)号：US4745280A

    公开(公告)日：1988-05-17

    申请号：US775746

    申请日：1985-09-13

    Applicant: Kwon Y. Gi ,  Lee Y. In ,  Lee Y. Gi

    Inventor： Kwon Y. Gi ,  Lee Y. In ,  Lee Y. Gi

    IPC: G01S7/00 ,  G01J1/42 ,  G01M11/00 ,  G01J5/08

    CPC classification number: G01J1/4257 ,  G01J2001/4261

    Abstract: An apparatus for accurately measuring laser beam intensity profiles so as to permit adjusting the oscillation mode of the laser to achieve good workability of the beam. The beam from a CO.sub.2 laser generator is attenuated and applied to an infrared sensor which produces an electrical analog signal representing the beam intensity. The sensed signal is amplified and applied via an A/D converter and an interface to a computer. The computer controls a scanner which scans successive scanning lines of the laser beam profile across the sensor. The computer also produces a visual image of the laser beam intensity profile from the sensor signal. An operator veiwing such image can make an accurate and convenient measurement of the laser beam intensity profile, thereby providing a basis for quantitative analysis in quality inspection of workpieces subjected to the laser beam.

    Abstract translation: 一种用于精确测量激光束强度分布的装置，以便调整激光器的振荡模式以实现光束的良好可操作性。 来自CO 2激光发生器的光束被衰减并应用于产生表示光束强度的电模拟信号的红外传感器。 感测到的信号通过A / D转换器和与计算机的接口进行放大和加载。 计算机控制扫描仪，其扫描传感器上的激光束轮廓的连续扫描线。 计算机还从传感器信号产生激光束强度分布的视觉图像。 操作人员可以对激光束强度分布进行准确和方便的测量，从而为经受激光束的工件的质量检验提供定量分析的基础。

    High power laser profiler
    22.
    发明授权
    High power laser profiler 有权

    公开(公告)号：US12092518B2

    公开(公告)日：2024-09-17

    申请号：US17676119

    申请日：2022-02-19

    Applicant: The Johns Hopkins University

    Inventor： Leo R. Gauthier, Jr. ,  Kenneth W. Harclerode

    IPC: G02B21/06 ,  G01J1/42 ,  H01S3/00

    CPC classification number: G01J1/4257 ,  G02B21/06 ,  H01S3/0014 ,  G01J2001/4261

    Abstract: Provided herein are a system and a method thereof which allows for calibrating a laser or getting characteristics of the laser by measuring the temporally and spatially resolved beam profile and power density cross-section using non-contact radiometry. An example method includes receiving a radiation beam from a light source by protrusions that protrude from a plate. The example method further includes imaging the protrusions, measuring a respective temperature of each of the protrusions based on the imaging, and profiling the radiation beam based on the measuring.

    METHOD AND APPARATUS FOR MEASURING TOPOLOGICAL CHARGE OF PARTIALLY COHERENT FRACTIONAL VORTEX BEAM
    23.
    发明公开
    METHOD AND APPARATUS FOR MEASURING TOPOLOGICAL CHARGE OF PARTIALLY COHERENT FRACTIONAL VORTEX BEAM 审中-公开

    公开(公告)号：US20230366732A1

    公开(公告)日：2023-11-16

    申请号：US18196830

    申请日：2023-05-12

    Applicant: SOOCHOW UNIVERSITY

    Inventor： Zhuoyi WANG ,  Chengliang ZHAO ,  Xingyuan LU ,  Qidong LIN ,  Xiaotan LU ,  Xuechun ZHAO ,  Yangjian CAI

    IPC: G01J1/42 ,  G01J1/04

    CPC classification number: G01J1/4257 ,  G01J1/0411 ,  G01J2001/4261

    Abstract: A to-be-measured partially coherent fractional vortex beam passes through a scattering object, an error between measurable information and to-be-measured information is minimized by using an optimization algorithm, and a main electric field mode and a weight of a to-be-measured fractional vortex beam are reconstructed by using a multimode stacked diffraction algorithm. A cross-spectral density function of the partially coherent fractional vortex beam is calculated, a cross-spectral density of a partially coherent fractional vortex optical field is reconstructed, and complete information including light intensity, a light intensity association, an electric field association, a phase, and the like of the partially coherent fractional vortex optical field is obtained. After the complete information of the partially coherent fractional vortex optical field is obtained, reverse transmission calculation is performed to obtain a source field vortex phase distribution, thereby implementing accurate topological charge measurement of the fractional vortex beam under low coherence conditions.

    Laser beam profile measurement
    26.
    发明申请
    Laser beam profile measurement 失效
    激光束剖面测量

    公开(公告)号：US20120314210A1

    公开(公告)日：2012-12-13

    申请号：US12932933

    申请日：2011-03-02

    Applicant: Peter L. Wick, JR.

    Inventor： Peter L. Wick, JR.

    IPC: G01J1/42

    CPC classification number: G01J1/4257 ,  G01J2001/4261

    Abstract: A method for characterizing a laser beam profile is provided. The method includes disposing a laser target, moving the surface of the target, directing a laser to emit the beam at the surface, measuring a reflection from the surface as intensities, and averaging the intensities. The target's surface is disposed substantially perpendicular to an incident direction. The surface is reflective at a wavelength corresponding to the laser beam. The travel direction is substantially parallel to the surface. The laser beam travels along said incident direction to the surface. The reflection represents a plurality of intensities having a distribution of positions along the surface and during a temporal interval. The intensities are averaged over the temporal interval for each position of the distribution to produce an analyzed beam profile. Each position corresponds to a speed along the travel direction based on movement of the surface. The surface can be preferably spun along an axis substantially parallel to the incident beam.

    Abstract translation: 提供了表征激光束轮廓的方法。 该方法包括设置激光靶，移动靶的表面，引导激光器在表面发射光束，测量表面的反射强度，并对强度求平均值。 目标表面基本上垂直于入射方向设置。 表面在对应于激光束的波长处是反射的。 行进方向基本上平行于表面。 激光束沿着入射方向行进到表面。 反射表示具有沿着表面的位置分布和在时间间隔期间的多个强度。 在分布的每个位置的时间间隔上对强度进行平均以产生分析的波束分布。 每个位置对应于基于表面移动的行进方向的速度。 该表面可以优选地沿着基本上平行于入射光束的轴线旋转。

    Methods and apparatus for beam density measurement in two dimensions
    27.
    发明申请
    Methods and apparatus for beam density measurement in two dimensions 有权
    二维光束密度测量的方法和装置

    公开(公告)号：US20080073550A1

    公开(公告)日：2008-03-27

    申请号：US11477335

    申请日：2006-06-29

    Applicant: Atul Gupta ,  Joseph C. Olson ,  Gregg A. Norris

    Inventor： Atul Gupta ,  Joseph C. Olson ,  Gregg A. Norris

    IPC: G01K1/08

    CPC classification number: H01J37/3171 ,  G01J1/04 ,  G01J1/0437 ,  G01J1/0448 ,  G01J1/4257 ,  G01J2001/4261 ,  H01J37/244 ,  H01J2237/2446 ,  H01J2237/24507 ,  H01J2237/24542 ,  H01J2237/24578 ,  H01J2237/30472 ,  H01J2237/31703

    Abstract: A beam density measurement system includes a shield, a beam sensor, and an actuator. The beam sensor is positioned downstream from the shield in a direction of travel of a beam. The beam sensor is configured to sense an intensity of the beam, and the beam sensor has a long dimension and a short dimension. The actuator translates the shield relative to the beam sensor, wherein the shield blocks at least a portion of the beam from the beam sensor as the shield is translated relative to the beam sensor, and wherein measured values of the intensity associated with changes in a position of the shield relative to the beam sensor are representative of a beam density distribution of the beam in a first direction defined by the long dimension of the beam sensor.

    Abstract translation: 光束密度测量系统包括屏蔽，光束传感器和致动器。 光束传感器沿着光束的行进方向定位在屏蔽的下游。 光束传感器被配置为感测光束的强度，并且光束传感器具有长尺寸和短尺寸。 执行器相对于光束传感器平移屏蔽，其中当屏蔽件相对于光束传感器平移时，屏蔽件阻挡来自光束传感器的光束的至少一部分，并且其中与位置变化相关联的强度的测量值 屏蔽物相对于光束传感器的光束密度分布代表由光束传感器的长尺寸限定的第一方向上的光束的光束密度分布。

    Methods and Systems for Laser Calibration and Eye Tracker Camera Alignment
    28.
    发明申请
    Methods and Systems for Laser Calibration and Eye Tracker Camera Alignment 有权
    用于激光校准和眼睛跟踪摄像机对准的方法和系统

    公开(公告)号：US20070225692A1

    公开(公告)日：2007-09-27

    申请号：US11755194

    申请日：2007-05-30

    Applicant: Seema Somani ,  Kingman Yee ,  John Shimmick

    Inventor： Seema Somani ,  Kingman Yee ,  John Shimmick

    IPC: A61F9/008 ,  A61B18/20

    CPC classification number: A61F9/00814 ,  A61B2017/00725 ,  A61F9/008 ,  A61F9/00802 ,  A61F2009/00846 ,  A61F2009/00855 ,  A61F2009/00872 ,  A61F2009/00897 ,  B23K26/705 ,  G01J1/4257 ,  G01J2001/4261 ,  G01N21/6456

    Abstract: The present invention provides methods, systems, and apparatus for calibrating a laser ablation system, such as an excimer laser system for selectively ablating a cornea of a patient's eye. The invention also facilitates alignment of eye tracking cameras that measure a position of the eye during laser eye surgery. A calibration and alignment fixture for a scanning laser beam delivery system having eye tracking cameras may include a structure positionable in a treatment plane. The structure having a feature directing laser energy incident thereon to a calibration energy sensor, at least one reference-edge to determine a characteristic of the laser beam (shape, dimensions, etc.), and an artificial pupil to determine alignment of the eye tracking cameras with the laser system.

    Abstract translation: 本发明提供了用于校准激光消融系统的方法，系统和装置，例如用于选择性地烧蚀患者眼睛的角膜的准分子激光系统。 本发明还有助于在激光眼睛手术期间测量眼睛位置的眼睛跟踪相机的对准。 用于具有眼睛跟踪摄像机的扫描激光束传送系统的校准和对准夹具可以包括可在治疗平面中定位的结构。 具有将激光能量入射到校准能量传感器的特征的结构，至少一个参考边缘以确定激光束的特性（形状，尺寸等）以及用于确定眼睛跟踪的对准的人造瞳孔 相机与激光系统。

    Methods and systems for laser calibration and eye tracker camera alignment
    30.
    发明申请
    Methods and systems for laser calibration and eye tracker camera alignment 有权
    用于激光校准和眼动仪相机对准的方法和系统

    公开(公告)号：US20040078031A1

    公开(公告)日：2004-04-22

    申请号：US10685253

    申请日：2003-10-13

    Applicant: VISX, Inc.

    Inventor： Seema Somani ,  Kingman Yee ,  John K. Shimmick

    IPC: A61B018/20

    CPC classification number: G01B11/002 ,  A61B2017/00725 ,  A61F9/008 ,  A61F9/00802 ,  A61F9/00804 ,  A61F9/00814 ,  A61F2009/00846 ,  A61F2009/00855 ,  A61F2009/00872 ,  A61F2009/00897 ,  B23K26/705 ,  G01J1/4257 ,  G01J2001/4261 ,  G01N21/6456

    Abstract: The present invention provides methods, systems, and apparatus for calibrating a laser ablation system, such as an excimer laser system for selectively ablating a cornea of a patient's eye. The invention also facilitates alignment of eye tracking cameras that measure a position of the eye during laser eye surgery. A calibration and alignment fixture for a scanning laser beam delivery system having eye tracking cameras may include a structure positionable in a treatment plane. The structure having a feature directing laser energy incident thereon to a calibration energy sensor, at least one reference-edge to determine a characteristic of the laser beam (shape, dimensions, etc.), and an artificial pupil to determine alignment of the eye tracking cameras with the laser system.

    Abstract translation: 本发明提供了用于校准激光消融系统的方法，系统和装置，例如用于选择性地烧蚀患者眼睛的角膜的准分子激光系统。 本发明还便于在激光眼睛手术期间测量眼睛位置的眼睛跟踪相机的对准。 用于具有眼睛跟踪摄像机的扫描激光束传送系统的校准和对准夹具可以包括可在治疗平面中定位的结构。 具有将激光能量入射到校准能量传感器的特征的结构，至少一个参考边缘以确定激光束的特性（形状，尺寸等）以及用于确定眼睛跟踪的对准的人造瞳孔 相机与激光系统。

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