SHG autocorrelator
    1.
    发明授权
    SHG autocorrelator 失效
    SHG自相关器

    公开(公告)号:US4973160A

    公开(公告)日:1990-11-27

    申请号:US334029

    申请日:1989-04-06

    IPC分类号: G01J9/02 G01J11/00 G01N21/63

    CPC分类号: G01J11/00 G01J9/02 G01N21/636

    摘要: An SHG autocorrelator for use in measuring the duration of an ultrashort pulse of light includes in one embodiment a thin pellicle beamsplitter for splitting the pulse of light into first and second beams, a stationary optical delay disposed along the path of the first beam, a movable optical delay disposed along the path of the second beam, a thin SHG crystal, a concave mirror for bringing the first and second beams to focus into the SHG crystal, a photodetector for detecting light emitted from the SHG crystal, and a narrow bandpass filter in front of the photodetector for filtering out non second harmonic light. The device reduces time broadening and delay of ultrashort pulses in the femtosecond time domain.

    摘要翻译: 用于测量超短脉冲光持续时间的SHG自相关器包括在一个实施例中,用于将光脉冲分为第一和第二光束的薄薄膜分束器,沿第一光束路径设置的固定光学延迟, 沿着第二光束的路径设置的光学延迟,薄的SHG晶体,用于使第一和第二光束聚焦到SHG晶体中的凹面镜,用于检测从SHG晶体发射的光的光电检测器和窄带通滤波器 用于滤除非二次谐波光的光电检测器的前部。 该器件减少了飞秒时域中超短脉冲的时间拓宽和延迟。

    Femtosecond streak camera
    2.
    发明授权
    Femtosecond streak camera 失效
    飞秒条纹相机

    公开(公告)号:US5278403A

    公开(公告)日:1994-01-11

    申请号:US693242

    申请日:1991-04-29

    IPC分类号: H01J31/50 H01J40/14

    CPC分类号: H01J31/502

    摘要: A streak camera having improved time resolving capacity in the femtosecond regime. The streak camera uses magnetic and/or electric fields in such a way as to minimize the adverse effects of angular distribution and energy distribution of photoelectrons simultaneously emitted from a photocathode in response to the impinging of light thereon. In one embodiment, the streak camera comprises a streak camera tube including a housing, the housing having disposed therein a photocathode, an aperture sized to selectively permit the passage therethrough of substantially on-axis photoelectrons, an accelerating mesh, a pair of focusing electrodes or a cylindrical focusing electrode for focusing the photoelectrons into a beam, a pair of isolation plates or an isolation cylindrical, means for creating an electric field and/or a magnetic field, whereby the beam of photoelectrons passing therethrough is caused to be dispersed into a plurality of trajectories in accordance with the distribution of velocities of the photoelectrons, an aperture sized to selectively permit the passage therethrough of photoelectrons traveling along a narrow band of trajectories, i.e. photoelectrons within a narrow velocity range, a pair of sweep electrodes, a microchannel plate, and a phosphor screen. The streak camera also includes an input slit disposed in front of the photocathode and optics for imaging the input slit on the photocathode. To minimize dispersion of the optical pulse as it is focused onto the photocathode, the optics preferably include a mirror arrangement instead of a lens system.

    摘要翻译: 一种具有改善飞秒状态下时间分辨能力的条纹相机。 条纹相机以这样的方式使用磁场和/或电场,以便最小化响应于其上的光的入射而同时从光电阴极发射的光电子的角分布和能量分布的不利影响。 在一个实施例中,条纹照相机包括条纹相机管,其包括壳体,壳体中设置有光电阴极,孔径的尺寸被设计成选择性地允许基本上轴向光电子的通过,加速网,一对聚焦电极或 用于将光电子聚焦到光束中的圆柱形聚焦电极,一对隔离板或隔离圆柱形,用于产生电场和/或磁场的装置,由此使通过其的光电子束被分散成多个 根据光电子的速度分布的轨迹的孔径,孔径选择性地允许沿着窄带轨迹(即,在窄速度范围内的光电子)行进的光电子的通过,一对扫掠电极,微通道板, 和荧光屏。 条纹相机还包括设置在光电阴极前面的输入狭缝和用于对光电阴极上的输入狭缝成像的光学器件。 为了使光脉冲在聚焦到光电阴极上的色散最小化,光学元件优选地包括镜子装置而不是透镜系统。

    Artificial color-center light source
    5.
    发明授权
    Artificial color-center light source 失效
    人造色中心光源

    公开(公告)号:US5889804A

    公开(公告)日:1999-03-30

    申请号:US803381

    申请日:1997-02-20

    IPC分类号: H01S3/08 H01S3/16

    CPC分类号: H01S3/1681

    摘要: In a color-center light source, a color center is formed artificially. A predetermined single atom is removed from the surface of a defect-free ionic crystal so as to form a lattice defect. Optical transition of the defect is utilized so that it functions as a light source.

    摘要翻译: 在彩色中心光源中,人造地形成色彩中心。 从无缺陷离子晶体的表面去除预定的单个原子以形成晶格缺陷。 利用缺陷的光学转换使其用作光源。

    Apparatus for measuring the temporal correlation of fundamental particles

    公开(公告)号:US4967080A

    公开(公告)日:1990-10-30

    申请号:US246106

    申请日:1988-09-19

    IPC分类号: G01J9/00

    CPC分类号: G01J9/00

    摘要: An apparatus for measuring the temporal correlation of fundamental particles such as photons, neutrons, X-rays or the like, comprising at least one deflector for sweeping the fundamental particles or images thereof in at least one direction, an aperture member having at least two apertures for time-divisionally extracting the swept fundamental particles or the images thereof, multiplication means, such as dynode groups or photomultipliers, for multiplying each of the extracted fundamental particles or the images thereof and a correlator for performing correlating arithmetic operations on the basis of each output signal from the multiplication means.

    High spatial and time resolution measuring apparatus
    8.
    发明授权
    High spatial and time resolution measuring apparatus 失效
    高空间和时间分辨率测量仪器

    公开(公告)号:US4920386A

    公开(公告)日:1990-04-24

    申请号:US339920

    申请日:1989-04-19

    摘要: A high spatial and time resolution measuring apparatus for optically measuring a fine area in an object to be measured, the apparatus comprising a stage for mounting a specimen thereon, a light source for generating a first light, a first optical system for leading the first light from the light source to the specimen, an objective lens for magnifying an image of a second light from the specimen, a second optical system for imaging a part of the image in a form of a slit, a streak tube having a photocathode at a position of image formation of the second optical system for receiving the part of the image and forming a streak image thereof, a housing for shielding the first optical system, the objective lens and the second optical system from stray light.

    摘要翻译: 一种高空间和时间分辨率测量装置,用于光学测量待测物体中的细微区域,该装置包括用于在其上安装样本的台,用于产生第一光的光源,用于引导第一光的第一光学系统 从光源到样本的物镜,用于放大来自样本的第二光的图像的物镜,用于以狭缝的形式成像图像的一部分的第二光学系统,在位置处具有光电阴极的条纹管 用于接收图像的一部分并形成其条纹图像的第二光学系统的图像形成,用于从杂散光屏蔽第一光学系统,物镜和第二光学系统的外壳。

    Object movement measuring apparatus
    9.
    发明授权
    Object movement measuring apparatus 失效
    物体运动测量装置

    公开(公告)号:US4902135A

    公开(公告)日:1990-02-20

    申请号:US187009

    申请日:1988-04-27

    CPC分类号: G01P3/40

    摘要: In an object movement measuring apparatus, a movement monitor detects the movement of an object under measurement to output a signal in synchronization with the movement, and the signal thus outputted is utilized to trigger the streak camera, so that the motion of an object moving at high-speed can be detected as a streak image.

    摘要翻译: 在物体运动测量装置中,运动监视器检测被测物体的移动,以与运动同步地输出信号,并且利用这样输出的信号来触发条纹相机,使得物体移动的运动 高速可以被检测为条纹图像。

    Streak camera device having a plurality of streak tubes
    10.
    发明授权
    Streak camera device having a plurality of streak tubes 失效
    条纹相机装置具有多个条纹管

    公开(公告)号:US4797747A

    公开(公告)日:1989-01-10

    申请号:US21228

    申请日:1987-03-03

    CPC分类号: G01J3/2889 G04F13/026

    摘要: A streak camera device comprising plural streak tubes generating a plurality of tube outputs for simultaneous measurement of a plurality of separate characteristics of a light emissions, the plural streak tubes forming electron beams in response to the light emission; a deflecting signal generating device including only a single deflecting signal generating device generating a deflection output for simultaneously deflecting the beams of the plural streak tubes; and a device for recording the tube outputs of the streak tubes.

    摘要翻译: 一种条纹相机装置,包括多个条形管,其产生多个管输出,用于同时测量多个独立的发光特性,所述多条条管响应于所述发光而形成电子束; 偏转信号产生装置仅包括单个偏转信号产生装置,其产生用于同时偏转多条条管的光束的偏转输出; 以及用于记录条纹管的管输出的装置。