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    Terahertz Frequency Domain Spectrometer with Controllable Phase Shift
    101.
    发明申请
    Terahertz Frequency Domain Spectrometer with Controllable Phase Shift 有权
    具有可控相移的太赫兹频域光谱仪

    公开(公告)号：US20090283680A1

    公开(公告)日：2009-11-19

    申请号：US12465219

    申请日：2009-05-13

    Applicant: Ronald T. Logan, JR. ,  Joseph R. Demers

    Inventor： Ronald T. Logan, JR. ,  Joseph R. Demers

    IPC: G01J5/02

    CPC classification number: G01J3/42 ,  G01J3/10 ,  G01J3/4531 ,  G01N21/3581

    Abstract: An apparatus for analyzing, identifying or imaging an target including an integrated dual laser module coupled to a pair of photoconductive switches to produce cw signals in the range of frequencies from 100 GHz to over 2 THz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral homodyne process to generate an electrical signal representative of some characteristics of the target with resolution less than 250 MHz. The photoconductive switches are activated by laser beams from the dual laser module. The lasers in the module are tuned to different frequencies and a phase shifter in the path of one beam allows the beams to have an adjustable phase difference.

    Abstract translation: 一种用于分析，识别或成像目标的装置，所述目标包括耦合到一对光电导开关的集成双激光模块，以产生聚焦在目标上并从所述目标传送或反射的从100GHz到超过2Hz的频率范围内的cw信号; 以及检测器，用于从从目标接收的信号中获取光谱信息，并使用多光谱零差处理来产生表示具有小于250MHz的分辨率的目标的某些特性的电信号。 光导开关由来自双激光模块的激光束激活。 模块中的激光器被调谐到不同的频率，并且在一个光束的路径中的移相器允许光束具有可调节的相位差。

    Broad band referencing reflectometer
    103.
    发明申请
    Broad band referencing reflectometer 审中-公开
    宽带参考反射计

    公开(公告)号：US20090002711A1

    公开(公告)日：2009-01-01

    申请号：US12231350

    申请日：2008-09-02

    Applicant: Dale A. Harrison

    Inventor： Dale A. Harrison

    IPC: G01N21/55

    CPC classification number: G01J3/2803 ,  G01J3/02 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0232 ,  G01J3/027 ,  G01J3/0286 ,  G01J3/0291 ,  G01J3/08 ,  G01J3/10 ,  G01J3/28 ,  G01J3/2823 ,  G01J3/36 ,  G01J3/42 ,  G01J3/4531 ,  G01N21/211 ,  G01N21/274 ,  G01N21/33 ,  G01N21/47 ,  G01N21/55 ,  G01N21/9501 ,  G01N2021/335

    Abstract: A spectroscopy system is provided which is optimized for operation in the VUV region and capable of performing well in the DUV-NIR region. Additionally, the system incorporates an optical module which presents selectable sources and detectors optimized for use in the VUV and DUV-NIR. As well, the optical module provides common delivery and collection optics to enable measurements in both spectral regions to be collected using similar spot properties. The module also provides a means of quickly referencing measured data so as to ensure that highly repeatable results are achieved. The module further provides a controlled environment between the VUV source, sample chamber and VUV detector which acts to limit in a repeatable manner the absorption of VUV photons. The use of broad band data sets which encompass VUV wavelengths, in addition to the DUV-NIR wavelengths enables a greater variety of materials to be meaningfully characterized. Array based detection instrumentation may be exploited to permit the simultaneous collection of larger wavelength regions.

    Abstract translation: 提供了一种光谱系统，其被优化用于在VUV区域中的操作并且能够在DUV-NIR区域中表现良好。 此外，该系统还包含一个光学模块，该模块提供可用于VUV和DUV-NIR中优化的可选择的源和检测器。 同样，光学模块提供通用的传送和收集光学器件，以使得能够使用类似的光点特性来收集两个光谱区域中的测量。 该模块还提供了快速参考测量数据的方法，以确保实现高度可重复的结果。 该模块还在VUV源，样品室和VUV检测器之间提供受控的环境，其作用是以可重复的方式限制VUV光子的吸收。 除了DUV-NIR波长之外，使用包含VUV波长的宽带数据集使得可以有意义地表征更多种类的材料。 可以利用基于阵列的检测仪器来允许同时收集更大的波长区域。

    Vacuum ultraviolet reflectometer having collimated beam
    106.
    发明申请
    Vacuum ultraviolet reflectometer having collimated beam 有权
    具有准直光束的真空紫外线反射计

    公开(公告)号：US20060192958A1

    公开(公告)日：2006-08-31

    申请号：US11412802

    申请日：2006-04-27

    Applicant: Dale Harrison

    Inventor： Dale Harrison

    IPC: G01J1/42 ,  G01J3/28

    CPC classification number: G01J3/2803 ,  G01J3/02 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0232 ,  G01J3/027 ,  G01J3/0286 ,  G01J3/0291 ,  G01J3/08 ,  G01J3/10 ,  G01J3/28 ,  G01J3/2823 ,  G01J3/36 ,  G01J3/42 ,  G01J3/4531 ,  G01N21/211 ,  G01N21/274 ,  G01N21/33 ,  G01N21/47 ,  G01N21/55 ,  G01N21/9501 ,  G01N2021/335

    Abstract: A spectroscopy system is provided which is optimized for operation in the VUV region and capable of performing well in the DUV-NIR region. Additionally, the system incorporates an optical module which presents selectable sources and detectors optimized for use in the VUV and DUV-NIR. As well, the optical module provides common delivery and collection optics to enable measurements in both spectral regions to be collected using similar spot properties. The module also provides a means of quickly referencing measured data so as to ensure that highly repeatable results are achieved. The module further provides a controlled environment between the VUV source, sample chamber and VUV detector which acts to limit in a repeatable manner the absorption of VUV photons. The use of broad band data sets which encompass VUV wavelengths, in addition to the DUV-NIR wavelengths enables a greater variety of materials to be meaningfully characterized. Array based detection instrumentation may be exploited to permit the simultaneous collection of larger wavelength regions.

    Abstract translation: 提供了一种光谱系统，其被优化用于在VUV区域中的操作并且能够在DUV-NIR区域中表现良好。 此外，该系统还包含一个光学模块，该模块提供可用于VUV和DUV-NIR中优化的可选择的源和检测器。 同样，光学模块提供通用的传送和收集光学器件，以使得能够使用类似的光点特性来收集两个光谱区域中的测量。 该模块还提供了快速参考测量数据的方法，以确保实现高度可重复的结果。 该模块还在VUV源，样品室和VUV检测器之间提供受控的环境，其作用是以可重复的方式限制VUV光子的吸收。 除了DUV-NIR波长之外，使用包含VUV波长的宽带数据集使得可以有意义地表征更多种类的材料。 可以利用基于阵列的检测仪器来允许同时收集更大的波长区域。

    Fourier transform spectrometer utilizing a birefringent optical component
    107.
    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

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

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

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

    CPC classification number: G01J3/447 ,  G01J3/4531

    Abstract: 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.

    Abstract translation: 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。

    Systems and methods for dual comb spectroscopy
    110.
    发明授权
    Systems and methods for dual comb spectroscopy 有权

    公开(公告)号：US11686622B2

    公开(公告)日：2023-06-27

    申请号：US17023080

    申请日：2020-09-16

    Applicant: The Regents of the University of Colorado, a body corporate

    Inventor： Gregory B. Rieker ,  Caroline B. Alden ,  Robert J. Wright ,  Sean C. Coburn

    IPC: G01J3/453 ,  G01N21/27 ,  G01J3/28

    CPC classification number: G01J3/4531 ,  G01N21/274 ,  G01J2003/2866 ,  G01J2003/4538

    Abstract: A frequency-measurement method uses a dual frequency-comb spectrometer as an optical wavemeter to measure the frequency of a reference laser that is used to frequency-stabilize the spectrometer. The method includes measuring a walking rate of center bursts in a sequence of interferograms recorded by the spectrometer, determining a number of teeth in each of a plurality of Nyquist windows formed by the dual frequency-comb spectrometer, and determining a Nyquist number of the one Nyquist window covering the laser frequency. The reference laser frequency can then be determined from the number of teeth in each Nyquist window, the Nyquist number, and the comb spacing of either one of the two frequency combs of the dual frequency-comb spectrometer. The reference laser frequency does not need to be measured with a separate wavemeter, or calibrated with respect to a known atomic or molecular transition.

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