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    Optical Arrangement for Spectral Decomposition of Light
    52.
    发明申请
    Optical Arrangement for Spectral Decomposition of Light 审中-公开

    公开(公告)号：US20180011334A1

    公开(公告)日：2018-01-11

    申请号：US15644527

    申请日：2017-07-07

    Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    Inventor： Uwe Detlef Zeitner ,  Thomas Flügel-Paul ,  Dirk Michaelis ,  Torsten Harzendorf

    IPC: G02B27/42 ,  G02B5/18

    CPC classification number: G02B27/4244 ,  G01J3/1804 ,  G01J2003/1208 ,  G02B5/1809 ,  G02B5/1814 ,  G02B5/1861

    Abstract: An optical arrangement for spectral decomposition of light is disclosed. In an embodiment the optical arrangement includes a reflection diffraction grating, a first medium with a refractive index nin arranged on a light incidence side of the reflection diffraction grating; and a second medium with a refractive index nG arranged on a side of the reflection diffraction grating that faces away from the light incidence side, with nin>nG, wherein the optical arrangement is configured in such a way that light impinges on the reflection diffraction grating from the first medium at an angle of incidence α, wherein a condition sin(α)>nG/nin is satisfied, wherein the reflection diffraction grating comprises a layer system with at least one unstructured layer and at least one structured layer, wherein the at least one structured layer has a periodic structure with a period p in lateral direction, and wherein the period p meets the following conditions: p λ/[nin*sin(α)+nin].

    Spectrometer of high diffraction efficiency for analyzing the spectrum of a light beam
    56.
    发明授权
    Spectrometer of high diffraction efficiency for analyzing the spectrum of a light beam 有权

    公开(公告)号：US09709441B2

    公开(公告)日：2017-07-18

    申请号：US14649065

    申请日：2013-11-29

    Applicant: HORIBA JOBIN YVON SAS

    Inventor： Olivier Acher ,  Simon Richard

    IPC: G01J3/447 ,  G01J3/02

    CPC classification number: G01J3/0224 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/1804 ,  G01J3/447 ,  G01J2003/1208

    Abstract: A spectrometer (100) for analyzing the spectrum of an upstream light beam (1) includes an entrance slit (101) and angular dispersing elements (130). The angular dispersing elements include at least one polarization-dependent diffraction grating that is suitable for, at the plurality of wavelengths (1, 2, 3), diffracting a corrected light beam (20) into diffracted light beams (31, 32, 33) in a given particular diffraction order of the polarization-dependent diffraction grating, which is either the +1 diffraction order or the −1 diffraction order, when the corrected light beam has a preset corrected polarization state that is circular; and the spectrometer includes elements for modifying polarization (1100) placed between the entrance slit and the angular dispersion elements, which are suitable for modifying the polarization state of the upstream light beam in order to generate the corrected light beam with a preset corrected polarization state.

    Linearized variable-dispersion spectrometers and related assemblies
    59.
    发明授权
    Linearized variable-dispersion spectrometers and related assemblies 有权
    线性化可变色散光谱仪及相关组件

    公开(公告)号：US09304038B2

    公开(公告)日：2016-04-05

    申请号：US14322986

    申请日：2014-07-03

    Applicant: Bioptigen, Inc.

    Inventor： Christopher Saxer ,  Robert H. Hart ,  Eric L. Buckland ,  Peter Huening ,  Bradley A. Bower

    IPC: G01J3/28 ,  G01J3/02 ,  A61B3/10 ,  A61B5/00 ,  G01J3/14 ,  G01J3/18 ,  G01J3/12

    CPC classification number: G01J3/0208 ,  A61B3/1005 ,  A61B5/0066 ,  G01J3/14 ,  G01J3/1804 ,  G01J3/28 ,  G01J2003/1208

    Abstract: Wavenumber linear spectrometers are provided including an input configured to receive electromagnetic radiation from an external source; collimating optics configured to collimate the received electromagnetic radiation; a dispersive assembly including first and second diffractive gratings, wherein the first diffraction grating is configured in a first dispersive stage to receive the collimated electromagnetic radiation and wherein the dispersive assembly includes at least two dispersive stages configured to disperse the collimated input; and an imaging lens assembly configured to image the electromagnetic radiation dispersed by the at least two dispersive stages onto a linear detection array such that the variation in frequency spacing along the linear detection array is no greater than about 10%.

    Abstract translation: 提供波数线性光谱仪，其包括被配置为从外部源接收电磁辐射的输入; 准直光学器件，被配置成准直所接收的电磁辐射; 包括第一和第二衍射光栅的分散组件，其中所述第一衍射光栅被配置在第一色散级中以接收所述准直电磁辐射，并且其中所述色散组件包括被配置为分散所述准直输入的至少两个色散级; 以及成像透镜组件，被配置为将由至少两个色散级分散的电磁辐射成像到线性检测阵列上，使得沿着线性检测阵列的频率间隔的变化不大于约10％。

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