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13 条记录 (耗时 0.012 秒)

    Autocorrelation of ultrashort electromagnetic pulses
    4.
    发明授权
    Autocorrelation of ultrashort electromagnetic pulses 有权
    超短电磁脉冲的自相关

    公开(公告)号：US06195167B1

    公开(公告)日：2001-02-27

    申请号：US09129726

    申请日：1998-08-05

    申请人： Derryck Telford Reid ,  William Ernest Donald Sleat ,  Wilson Sibbett

    发明人： Derryck Telford Reid ,  William Ernest Donald Sleat ,  Wilson Sibbett

    IPC分类号： G01B902

    CPC分类号： G01J11/00

    摘要： There is provided an autocorrelator of ultrashort electromagnetic pulses, comprising an interferometer for receiving a parent electromagnetic pulse from an energy source and for deriving two daughter electromagnetic pulses from the parent pulse, an output means coupled to the interferometer to output the daughter pulses, and a photodiode in communication with the output means to detect the daughter pulses and to alter the frequency thereof so as to produce an electrical output signal that has a quadratic dependence on the power associated with the parent electromagnetic pulse. The temporal duration of the pulses ranges from TO picoseconds to 5 femtoseconds. A GaAsP photodiode is used with a broad band response of 700-1300 nm. The interferometer is either a Michelson interferometer or a Wollaston prism interferometer and a microscope objective is provided between the output means and the photodiode so that the pulses from the output means are focused onto a defined area of the photodiode.

    摘要翻译： 提供了一种超短电磁脉冲的自相关器，包括用于从能量源接收母电磁脉冲并从母脉冲导出两个子电磁脉冲的干涉仪，耦合到干涉仪以输出子脉冲的输出装置，以及 与输出装置通信的光电二极管，用于检测子脉冲并改变其频率，从而产生与母电磁脉冲相关的功率具有二次依赖性的电输出信号。 脉冲的持续时间范围从TO皮秒到5飞秒。 GaAsP光电二极管使用700-1300 nm的宽带响应。 干涉仪是迈克尔逊干涉仪或沃拉斯顿棱镜干涉仪，并且在输出装置和光电二极管之间提供显微镜物镜，使得来自输出装置的脉冲聚焦到光电二极管的限定区域上。

    Fourier transform spectrometer utilizing a birefringent optical component
    6.
    发明授权
    Fourier transform spectrometer utilizing a birefringent optical component 失效
    利用双折射光学部件的傅里叶变换光谱仪

    公开(公告)号：US5781293A

    公开(公告)日：1998-07-14

    申请号：US586671

    申请日：1996-04-17

    申请人： John Miles Padgett ,  Alan James Duncan ,  Wilson Sibbett ,  Andrew Robert Harvey

    发明人： John Miles Padgett ,  Alan James Duncan ,  Wilson Sibbett ,  Andrew Robert Harvey

    IPC分类号： G01J3/447 ,  G01J3/453 ,  G01B9/02

    CPC分类号： G01J3/447 ,  G01J3/4531

    摘要： A Fourier-transform spectrometer contains a birefringent optical component, removing the need for a Michelson interferometer used in conventional instruments. A suitable birefringent element such as a Wollaston prism, is used to introduce a path difference between two light polarisations. Use of an extended light source so that all areas of the birefringent component are illuminated simultaneously ensures that different positions on the birefringent component correspond to different path differences between the two polarisations. A Fourier-transform of the resulting interferogram at the detector results in the spectral distribution of the input light being obtained. The use of an extended light source permits a Fourier-transform spectrometer with no moving parts to be achieved.

    摘要翻译： PCT No.PCT / GB94 / 01499 Sec。 371日期：1996年4月17日 102（e）日期1996年4月17日PCT 1994年7月11日PCT公布。 公开号WO95 / 02171 日期1995年1月19日傅立叶变换光谱仪包含双折射光学部件，不需要用于传统仪器中的迈克尔逊干涉仪。 使用诸如Wollaston棱镜的合适的双折射元件来引入两个光极化之间的路径差异。 使用扩展光源使得双折射元件的所有区域同时被照亮，确保双折射元件上的不同位置对应于两个极化之间的不同路径差异。 在检测器处的​​所得干涉图的傅立叶变换导致所获得的输入光的光谱分布。 使用扩展光源允许不具有移动部件的傅里叶变换光谱仪。

    Reduced complexity fourier transform spectrometer
    7.
    发明授权
    Reduced complexity fourier transform spectrometer 失效
    降低复杂度的傅立叶变换光谱仪

    公开(公告)号：US5774215A

    公开(公告)日：1998-06-30

    申请号：US709296

    申请日：1996-09-09

    申请人： Miles John Padgett ,  Wilson Sibbett ,  Johannes Courtial ,  Brett Alexander Patterson

    发明人： Miles John Padgett ,  Wilson Sibbett ,  Johannes Courtial ,  Brett Alexander Patterson

    IPC分类号： G01J3/453 ,  G01B9/02

    CPC分类号： G01J3/4537

    摘要： A Fourier transform spectrometer for use, among others, for sensing gases or liquids includes two polarizers, a birefringent optical component interposed between the two polarizers and a detector. Light from an extended source is substantially polarized by a first of the two polarizers, split into divergent beams by the birefringent optical component, and again caused to converge by the birefringent optical component so that, after passing through a second of the two polarizers, the light forms an interferogram in a plane behind the birefringent optical component where the detector is situated. The Fourier transform spectrometer is thereby provided with a way of forming an interferogram of the light from the extended source without a lens or a second birefringent optical component. This improves the field of view of the spectrometer and is likely to reduce its cost.

    摘要翻译： 用于检测气体或液体的傅立叶变换光谱仪包括两个偏振器，两个偏振器之间的双折射光学部件和检测器。 来自扩展源的光被两个偏振器中的第一个基本上极化，通过双折射光学部件分裂成发散光束，并且再次由双折射光学部件会聚，使得在穿过两个偏振器中的第二个偏振器之后， 光在检测器所在的双折射光学部件的后面的平面中形成干涉图。 因此，傅立叶变换光谱仪具有形成来自不具有透镜或第二双折射光学部件的来自扩展源的光的干涉图的方式。 这改善了光谱仪的视野，并且可能降低其成本。

    Apparatus for measuring light beam characteristics
    9.
    发明授权
    Apparatus for measuring light beam characteristics 失效
    用于测量光束特性的装置

    公开(公告)号：US4693599A

    公开(公告)日：1987-09-15

    申请号：US837644

    申请日：1986-03-05

    申请人： Walter Margulis ,  Wilson Sibbett ,  William E. Sleat

    发明人： Walter Margulis ,  Wilson Sibbett ,  William E. Sleat

    IPC分类号： G01T1/24 ,  G01J1/00 ,  H01L31/02 ,  H01L31/08 ,  G01J1/42 ,  H01L27/14

    CPC分类号： H01L31/08

    摘要： The spatial or temporal characteristic of a beam of light or other electromagnetic radiation or a beam of sub-atomic particles is measured by an array of detectors. The array comprises the layer 1 of photosensitive material on which there are positioned pairs of electrodes 1a, 2a and 1b, 2b etc., with gaps between the electrodes of a pair. The gaps are spaced apart linearly and the material is chosen so that incident light affects current flow between the electrodes defining a gap. Changes in current flow between the individual pairs of electrodes are measured. For measurement of spatial profile layer 1 has a resistivity which varies linearly with the amplitude of incident light. For measurement of temporal profile the beam is split with the split beams being directed on to the array with different angles of incidence and the material is chosen to have a two-photon conductivity.

    摘要翻译： 通过一组检测器测量光束或其他电磁辐射或亚原子粒子束的空间或时间特性。 该阵列包括感光材料层1，其上设置有一对电极1a，2a和1b，2b等之间的间隔。 这些间隙线性地间隔开，并且选择材料使得入射光影响限定间隙的电极之间的电流。 测量各对电极之间电流的变化。 对于空间分布层1的测量具有随入射光的振幅线性变化的电阻率。 为了测量时间曲线，将光束分裂，分束束以不同的入射角被引导到阵列，并且选择材料具有双光子导电性。