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    SYSTEM AND METHOD FOR ANALYZING LIGHT BY THREE-PHOTON COUNTING
    1.
    发明申请
    SYSTEM AND METHOD FOR ANALYZING LIGHT BY THREE-PHOTON COUNTING 有权
    用三分光计算分析光的系统和方法

    公开(公告)号：US20120160993A1

    公开(公告)日：2012-06-28

    申请号：US13338386

    申请日：2011-12-28

    Applicant: Amir Nevet ,  Alex Hayat ,  Meir Orenstein

    Inventor： Amir Nevet ,  Alex Hayat ,  Meir Orenstein

    IPC: H01L31/0232

    CPC classification number: G01J11/00 ,  G01J1/42 ,  G01J9/02 ,  G01J2001/442 ,  G01J2001/4466 ,  G01J2009/0211

    Abstract: A system for measuring one or more characteristics of light of a photon energy Eph from a light source, that can be determined from measuring three-photon absorption events, the system comprising: a) a detector having a band gap material characterized by gap energy between 2.1 and 3 times Eph; b) an optical element configured to concentrate a beam of light from the light source on the detector; c) a signal amplifier that amplifies an output signal indicative of when three photons produced by the light source undergo a three-photon absorption event in the band gap material; and d) an analyzer that analyzes the output signal to count or measure a rate of the three-photon absorption events, and determines the one or more characteristics of the light from the light source.

    Abstract translation: 一种用于测量来自光源的光子能量Eph的光的一个或多个特性的系统，其可以通过测量三光子吸收事件来确定，所述系统包括：a）具有带隙材料的检测器，其特征在于， 2.1倍和3倍Eph; b）光学元件，被配置为将来自光源的光束聚集在检测器上; c）信号放大器，其放大指示由所述光源产生的三个光子何时在所述带隙材料中经历三光子吸收事件的输出信号; 以及d）分析器，其分析输出信号以计数或测量三光子吸收事件的速率，并且确定来自光源的光的一个或多个特性。

    PHASE STEP DIFFRACTOMETER
    4.
    发明申请
    PHASE STEP DIFFRACTOMETER 审中-公开
    相位差分计

    公开(公告)号：US20160252392A1

    公开(公告)日：2016-09-01

    申请号：US14634584

    申请日：2015-02-27

    Applicant: MOHAMMAD TAGHI TAVASSOLY ,  SEYED ROOHOLLAH HOSSEINI

    Inventor： MOHAMMAD TAGHI TAVASSOLY ,  SEYED ROOHOLLAH HOSSEINI

    IPC: G01J1/06 ,  G01J9/02 ,  G01B11/24 ,  G01J3/453

    CPC classification number: G01J3/453 ,  G01J9/0246 ,  G01J2009/0211

    Abstract: A phase step diffractometer is disclosed that utilizes Fresnel diffraction from a 1D step. The main part of the device is a step with two flat parallel mirrors on either side. The phase difference (PD) is changed by varying the light incident angle and the step height. The diffracted lights from the step are caught by a CCD connected to a PC. By varying PD, the visibility of the three central diffraction fringes changes. This permits low uncertainties in the measurements of wavelength, coherence length, coherence width, plate thickness, surface topography and fine displacement of objects. In addition, the device can be used in determination of broad spectral line shapes and optical constants of materials.

    Abstract translation: 公开了使用来自1D步骤的菲涅耳衍射的相位衍射仪。 该装置的主要部分是两面平行的两个平行镜。 通过改变光入射角和台阶高度来改变相位差（PD）。 来自台阶的衍射光被连接到PC的CCD捕获。 通过改变PD，三个中心衍射条纹的可视性发生变化。 这允许在波长，相干长度，相干宽度，板厚度，表面形貌和物体的精细位移的测量中的低不确定性。 此外，该装置可用于确定材料的宽谱线形状和光学常数。

    Laser discrimination device
    5.
    发明授权
    Laser discrimination device 失效
    激光识别装置

    公开(公告)号：US5272332A

    公开(公告)日：1993-12-21

    申请号：US641650

    申请日：1991-01-15

    Applicant: Xiaohui Ning

    Inventor： Xiaohui Ning

    IPC: G01J1/42 ,  G01J3/12 ,  G01J9/00 ,  G01J9/02 ,  G02B5/28 ,  G02F1/21 ,  G02F1/03

    CPC classification number: G02F1/21 ,  G01J9/00 ,  G02B5/288 ,  H01L41/083 ,  G01J1/0488 ,  G01J2003/1226 ,  G01J2009/0211

    Abstract: A laser discrimination filter based on temporal coherence is presented. This filter comprises a multilayer device with "thick" layers such that the optical thickness of each layer is greater than the coherence length of the ambient light, but still much smaller than the coherence length of the laser light of interest. Thus, the spectral response of the device of this invention becomes dependent on the degree of temporal coherence of the incident light. If white light strikes the filter, multi-beam interference will not occur because of its short coherence length. The device acts like a stack of partially reflecting mirrors. If the laser light strikes the filter, multi-beam interference will still take place because of the long coherence length of the laser light. This causes the device to have different transmitting characteristics for laser light and white light. Therefore, this device functions as a laser discrimination device.

    Abstract translation: 提出了一种基于时间相干性的激光识别滤波器。 该滤波器包括具有“厚”层的多层器件，使得每层的光学厚度大于环境光的相干长度，但仍远远小于感兴趣的激光的相干长度。 因此，本发明的装置的光谱响应取决于入射光的时间相干程度。 如果白光照射过滤器，则由于其短的相干长度而不会发生多光束干涉。 该装置像一堆部分反射镜一样起作用。 如果激光照射过滤器，则由于激光的长相干长度，仍然会发生多光束干涉。 这使得该装置对于激光和白光具有不同的透射特性。 因此，该装置用作激光识别装置。

    Apparatus for optical system coherence testing
    6.
    发明授权
    Apparatus for optical system coherence testing 失效
    光学系统相干测试装置

    公开(公告)号：US07161684B2

    公开(公告)日：2007-01-09

    申请号：US11139479

    申请日：2005-05-31

    Applicant: Matthew E. Hansen

    Inventor： Matthew E. Hansen

    IPC: G01B11/02

    CPC classification number: G03F7/70583 ,  G01J9/02 ,  G01J2009/0211 ,  G03F1/44 ,  G03F7/70025 ,  G03F7/70591

    Abstract: The present invention is directed at a coherence test reticle or lithographic plate, and a method for testing the coherence of a laser beam using the test reticle. The quality or coherence of the laser beam is measured by illuminating the test reticle and recording and/or analyzing the optical patterns generated by the illumination. The technique was designed for the characterization of laser-based systems via the detection of optical radiation modulated by transmissive, reflective and diffractive patterns printed on a reticle or lithographic plate designed specifically for this purpose. The novelty and advantages over the prior art are insensitivity to vibration, alignment, and multi-path differences associated with classical interferometric coherence measurement techniques. The technique is focus error insensitive. The robustness and convenience of the technique is driven by the use of a single plate with no optical alignment, making the technique easily implemented in the field.

    Abstract translation: 本发明涉及相干测试标线片或平版印刷版，以及用于使用测试掩模版测试激光束的相干性的方法。 通过照射测试标线并记录和/或分析由照明产生的光学图案来测量激光束的质量或相干性。 该技术被设计用于通过检测印刷在专门为此目的而设计的掩模版或平版印刷板上的透射，反射和衍射图案调制的光学辐射来表征基于激光的系统。 与现有技术相比，新颖性和优点对于与经典的干涉相干测量技术相关的振动，对准和多径差异是不敏感的。 该技术是焦点误差不敏感。 该技术的鲁棒性和便利性是通过使用不具有光学对准的单个板来驱动的，使得该技术在现场容易地实现。

    Method and apparatus for optical system coherence testing
    7.
    发明申请
    Method and apparatus for optical system coherence testing 失效
    光学系统一致性测试的方法和装置

    公开(公告)号：US20020027662A1

    公开(公告)日：2002-03-07

    申请号：US09899570

    申请日：2001-07-06

    Inventor： Matthew E. Hansen

    IPC: G01B009/02

    CPC classification number: G03F7/70583 ,  G01J9/02 ,  G01J2009/0211 ,  G03F1/44 ,  G03F7/70025 ,  G03F7/70591

    Abstract: The present invention is directed at a coherence test reticle or lithographic plate, and a method for testing the coherence of a laser beam using the test reticle. The quality or coherence of the laser beam is measured by illuminating the test reticle and the recording and/or analyzing the optical patterns generated by the illumination. The technique was designed for, but not limited to, the characterization of laser-based systems via the detection of optical radiation modulated by transmissive, reflective and diffractive patterns printed on a reticle or lithographic plate designed specifically for this purpose. The novelty and advantages over the prior art are insensitivity to vibration, alignment, and multi-path differences of classical interferometric coherence measurement techniques. Spatial coherence and longitudinal or temporal coherence may be measured independently. Vertical and horizontal coherence may be measured independently. The technique is focus error insensitive. That is to say, that focus errors will be recorded by the technique in a deterministic fashion and can be removed from the data. The robustness and convenience of the technique is driven by the single plate with no optical alignment, making the technique easily implemented in the field. The multiplexing of the feature orientations, sizes and line types and feature locations allows for the determination of coherence parameters as a function of position in the beam.

    Abstract translation: 本发明涉及相干测试标线片或平版印刷版，以及用于使用测试掩模版测试激光束的相干性的方法。 通过照射测试标线和记录和/或分析由照明产生的光学图案来测量激光束的质量或相干性。 该技术设计用于但不限于通过检测由通过专门为此目的而设计的掩模版或平版印刷板上印刷的透射，反射和衍射图案调制的光学辐射来表征激光系统。 与现有技术相比的新颖性和优点是对经典干涉相干测量技术的振动，对准和多径差异不敏感。 可以独立地测量空间相干性和纵向或时间相干性。 垂直和水平相干可以独立测量。 该技术是焦点误差不敏感。 也就是说，该技术将以确定性的方式记录焦点误差，并且可以从数据中移除。 该技术的坚固性和便利性由单板驱动，无需光学对准，使得该技术在现场轻松实现。 特征取向，尺寸和线类型以及特征位置的多路复用允许确定作为光束中位置的函数的相干参数。

    Fiber optic coherence meter
    8.
    发明授权
    Fiber optic coherence meter 失效
    光纤相干仪

    公开(公告)号：US4747688A

    公开(公告)日：1988-05-31

    申请号：US911935

    申请日：1986-09-26

    Applicant: Joseph M. Geary

    Inventor： Joseph M. Geary

    IPC: G01J9/02 ,  G01B9/02

    CPC classification number: G01J9/02 ,  G01J2009/0211 ,  G01J2009/0226

    Abstract: An incident light field is applied to the two separate front fiber faces of a pair of identical optical fibers which are initially held in a common plane. One fiber face is always kept stationary. The other fiber face may be moved either laterally in a plane common to the stationary face, or longitudinally into and out of the common plane. The output end of the device comprises two separate rear fiber faces that are held in a common plane. These faces are stationary. There is no lateral or longitudinal motion of one relative to the other. The light emerging from these two faces interferes in the far field. Straight line interference fringes whose spacing depends upon the lateral separation of the rear fiber faces are formed. The fringe modulation, however, depends upon the relative position of the front fiber faces. This modulation changes as one front face is scanned either laterally or longitudinally. The modulation changes with such motion is related to the degree of spatial or temporal coherence of the incident light field.

    Abstract translation: 入射光场被施加到最初保持在公共平面中的一对相同光纤的两个分开的前纤维面上。 一个纤维面总是保持静止。 另一个纤维面可以在与固定面共同的平面中横向移动，或纵向进入和离开公共平面。 该装置的输出端包括保持在公共平面中的两个单独的后纤维面。 这些面是静止的。 没有一个相对于另一个的横向或纵向运动。 从这两个面孔出现的光线在远处干扰。 形成间隔取决于后纤维面的横向分离的直线干涉条纹。 然而，边缘调制取决于前纤维面的相对位置。 当一个正面被横向或纵向扫描时，该调制变化。 这种运动的调制变化与入射光场的空间或时间相干程度有关。

    Radiation interference devices
    9.
    发明授权
    Radiation interference devices 失效
    辐射干扰装置

    公开(公告)号：US4722604A

    公开(公告)日：1988-02-02

    申请号：US461203

    申请日：1983-01-20

    Applicant: Herbert A. French ,  Philip Sutton

    Inventor： Herbert A. French ,  Philip Sutton

    IPC: G01J3/45 ,  G01J9/02 ,  G01B9/02 ,  H04B9/00

    CPC classification number: G01J9/02 ,  G01J2009/0211 ,  G01J3/45

    Abstract: An interference device for discriminating between radiation sources of differing coherence length comprises means to divide received radiation from a source into two components. A path difference, defining a coherence length cut-off, is introduced into the path of one component and the components are brought together for interference. The recombined light passes through a reticle with alternate opaque and tranparent bars and an optical band-pass filter to a detector. Interference fringes present in the plane of the reticle are swept across the reticle by the action of the collection optical system of the device which includes a scanning rotating mirror. Two similar devices can be arranged for band-pass coherence length filtering and when used in conjunction with a light soruce whose coherence is modulated the device can be used for signalling.

    Abstract translation: 用于区分不同相干长度的辐射源的干扰装置包括将来自源的接收辐射分成两部分的装置。 定义相干长度截止的路径差被引入到一个组件的路径中，并且组件被聚集在一起用于干扰。 重新组合的光通过具有交替的不透明透明棒和光学带通滤光器的掩模版到检测器。 通过包括扫描旋转镜的装置的收集光学系统的作用，存在于掩模版的平面中的干涉条纹扫过光罩。 可以安排两个类似的装置用于带通相干长度滤波，并且当与光耦合器一起使用时，其相干性被调制，该装置可以用于信令。

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