WO2005095910A1 - Spectrometre - Google Patents

Spectrometre Download PDF

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Publication number
WO2005095910A1
WO2005095910A1 PCT/RU2005/000159 RU2005000159W WO2005095910A1 WO 2005095910 A1 WO2005095910 A1 WO 2005095910A1 RU 2005000159 W RU2005000159 W RU 2005000159W WO 2005095910 A1 WO2005095910 A1 WO 2005095910A1
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WO
WIPO (PCT)
Prior art keywords
video signal
linear video
signal shapers
spectrometer
spectrum
Prior art date
Application number
PCT/RU2005/000159
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English (en)
Inventor
Alexandr Markovich Livshits
Original Assignee
Alexandr Markovich Livshits
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alexandr Markovich Livshits filed Critical Alexandr Markovich Livshits
Publication of WO2005095910A1 publication Critical patent/WO2005095910A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
    • G01J3/20—Rowland circle spectrometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/04—Slit arrangements slit adjustment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/2803—Investigating the spectrum using photoelectric array detector

Definitions

  • the present invention relates to spectrometry.
  • the known spectrometers have been created using optical designs of pre-existing spectrographs, in which they incorporated an entrance slit, a concave grating and a photographic film as a radiation detector.
  • a spectrometer described in RU Patent 2,105,272 publication date February 20, 1998) that comprises a concave grating, an entrance slit and a photodetector.
  • the spectrometer makes possible the simultaneous measurement of spectra of three radiations directed through the entrance slit.
  • Linear video signal shapers in particular linear charged-coupled devices (CCD-registers), are used, however, as radiation detectors. In so doing, not a limited set of isolated spectral lines, but rather those extended sections of the spectrum that are coincide in length with a CCD-register photosensitive part, are recorded.
  • the drawback to the closest prior art with respect to the present invention resides in the formation of "blind regions" between CCD-registers placed in series on the Rowland circle. Even though the CCD-registers are placed immediately adjacent to each other, a "blind region", that is the absence of radiation reception, will be preserved between their photosensitive portions.
  • the other drawbacks reside in the availability of considerable sizes to be defined by the radius of curvature of the concave grating and hence by the diameter of the Rowland circle.
  • the claimed inventions are aimed at creating low-bulk spectrometers that make possible the measuring of extended spectra.
  • a technical effect to be ensured by the claimed method of measuring a radiation spectrum, the claimed spectrometer and the claimed small-size spectrometer consists in the measurement of extended spectra using several LVSS without loss of information about a spectrum section placed at the LVSS interfaces.
  • an additional decrease in the spectrometer overall dimensions is provided.
  • the above technical effect is afforded in a method of measuring a radiation spectrum contemplating the directing of a radiation flux through a slit toward a concave grating and then toward, at least, two linear video signal shapers.
  • the radiation flux is pre-divided into two parts directed toward the said grating separately through two slits displaced from each other in the direction being perpendicular to the plane of the Rowland circle, and then toward different linear video signal shapers, while forming on one linear video signal shaper, from one flux part, a spectrum section being a continuous extension of a spectrum section to be formed on the other linear video signal shaper from the other flux part.
  • the radiation flux parts to be directed toward the concave grating may be equal.
  • the radiation flux parts may be directed toward the concave grating through two slits displaced from the plane of the Rowland circle by one amount but different in sign, relative to the said plane.
  • linear video signal shapers CCD- registers
  • 2N or 2N+1 linear video signal shapers where N is equal to 1, 2, 3, ... and limited to a reasonable amount, which may be as much as several dozens.
  • N or N+l linear video signal shapers there are formed spectrum sections from one flux part, which are a continuous extension of spectrum sections to be formed on N other video signal shapers from the other flux part.
  • the spectrometer comprises an entrance slit, a concave grating and linear video signal shapers. Additionally, to measure a spectrum without loss of information about a spectrum section placed at the interfaces between the linear video signal shapers, the spectrometer comprises a second entrance slit arranged to be displaced from a first slit in the direction being perpendicular to the plane of the Rowland circle, an optical unit that divides the radiation flux into two parts to be directed by said unit respectively through the first and second slits toward the concave grating, whereas one of said linear video signal shapers being optically linked, by means of the concave grating, to the first entrance slit, the other - to the second entrance slit, and the both linear video signal shapers being arranged so that the spectrum sections formed on them are a continuous extension of each other.
  • a corresponding optical system is of a radically different kind from an optical system used in spectrographs and the known spectrometers.
  • the entrance slits may be turned in their plane about the axis being perpendicular to this plane and fixed in this position.
  • the entrance slits may be arranged with displacement along the Rowland circle.
  • one group of N or N+l linear video signal shapers being optically linked, by means of the concave grating, to the first entrance slit, the other group of N other linear video signal shapers - to the second entrance slit, and the both groups of linear video signal shapers being arranged so that the spectrum sections formed on linear video signal shapers from one group are a continuous extension of the spectrum sections to be formed on linear video signal shapers from the other group.
  • the small-size spectrometer comprises an entrance slit, a concave grating and linear video signal shapers.
  • the small-size spectrometer in order to measure a spectrum without loss of information about a spectrum section placed at the interfaces between the linear video signal shapers and to decrease its overall dimensions, comprises a flat mirror being arranged perpendicular to the plane of the Rowland circle at its center, a second entrance slit being arranged with displacement relative to a first slit in the direction being perpendicular to the plane of the Rowland circle, and an optical unit that divides the radiation flux into two parts to be directed by said unit respectively through the first and second slits toward the flat mirror, whereas one of said linear video signal shapers being optically linked, by means of the flat mirror and concave grating, to the first entrance slit, the other - to the second entrance slit, and the both linear video signal shapers being arranged so that the spectrum sections formed on them are a continuous extension of each other.
  • one group of N or N+l linear video signal shapers being optically linked, by means of the flat mirror and the concave grating, to the first entrance slit, the other group of N other linear video signal shapers - to the second entrance slit, and the both groups of linear video signal shapers being arranged so that the spectrum sections formed on linear video signal shapers from one group are a continuous extension of the spectrum sections to be formed on linear video signal shapers from the other group.
  • the region of a possible LVSS positioning is limited because of a decrease in the spectrometer overall dimensions, thus resulting in the limitation of extent of a spectrum to be measured.
  • the flat mirror may have several, at least two fixed positions, and be arranged to turn by corresponding angles about the axis being perpendicular to the plane of the Rowland circle at its center.
  • FIG. 1 and FIG. 2 illustrate a spectrometer optical design
  • FIG. 3 and FIG. 4 illustrate the embodiments of placing entrance slits and LVSS relative to the plane of the Rowland circle
  • FIG. 5 illustrates an optical design of a small-size spectrometer.
  • a method of measuring a spectrum and a corresponding spectrometer may be implemented as shown in FIG. 1.
  • the radius of curvature of the concave grating 1 corresponds to the diameter of the Rowland circle 2 and must be minor, in order to achieve compactness of the device in accordance with the present invention.
  • Two entrance slits 3 are positioned so that a first one is above and a second one is below the plane of the Rowland circle 2.
  • the Rowland circle for concave gratings see, for example, A. N. Zaidel, G. V. Ostrovskaya, Y. I. Ostrovsky "The Technique and Practice of Spectroscopy", Nauka, Moscow, 1976, p.
  • Illumination of the slits is carried out by dividing the luminous flux from a radiation source, using an optical unit - a divider, into two parts to be transmitted separately toward a first and a second slit respectively.
  • said optical unit - divider may be made to the shape of a light pipe 4 having one input optically linked with a radiation source 5 and two branching outputs brought immediately adjacent to the entrance slits. In so doing, there are formed two identical spectra positioned at the same distances as their respective slits, from the plane of the Rowland circle - one is above the other is below.
  • a spectrum to be observed is located not under the slit but with displacement along the Rowland circle.
  • Values of the spectra themselves are calculated by means of a computer connected via an electronic unit to LVSS.
  • This electronic unit serves to control operation of LVSS, to take signals therefrom and enter these signals to a computer for their presentation in digital and visual forms.
  • LVSS use may be made, for example, of photodiode matrixes, photodiode registers or CCD.
  • the number of CCD- registers amounts to 4 or 5 (TCD1304AP - TOSHIBA, Japan). To enable application of these registers in the ultra-violet spectrum region, glass entrance windows were replaced with quartz ones.
  • the number of photosensitive cells in the CCD-register amounts to 3648. Each cell measures 8 x 200 ⁇ m.
  • An operating region of the spectrum measures 180 - 350 nm or 180 - 410 nm.
  • One entrance slit of the created spectrometer is positioned 7 mm above the Rowland circle, whereas the other - 7 mm below the Rowland circle.
  • the entrance slits are spaces apart relative to each other in the Rowland circle for such distance in which LVSS are arranged strictly one above another (see, FIG. 4).
  • the entrance slits are arranged compactly, whilst in the second embodiment - LVSS do so.
  • the spectrometer design (see, FIG. 5) additionally comprises a flat mirror 9 being arranged perpendicular to the plane of the Rowland circle 2 with its reflecting plane being directed toward entrance slits 3 (in FIG. 5 they are merged into one image, since they are above each over) and aligned with the axis that is perpendicular to the plane of the Rowland circle and pass through its center 10.
  • the mirror has a possibility to turn about the said axis.
  • the entrance slits 3, a grating 1 and a set of LVSS 6 (which are also arranged above each other in staggered order) are arranged on one side from the mirror, to allow reduction in the spectrometer overall dimensions by one half. Radiation coming out of the entrance slits 3 is reflected from the mirror 9 and falls on the grating 1 and, after having been reflected from the grating 1, it decomposes with space according to wavelengths and finds its way back to the mirror 9. After a secondary reflection from this mirror, radiation of each wavelength is focused on photosensitive parts of radiation detectors 6.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

Un procédé pour mesurer le spectre permet l'enregistrement et la mesure d'une section de spectre étendue, effectués au moyen d'une grille concave, sans pertes aux interfaces entre des formateurs de signaux vidéo linéaires tels que notamment les dispositifs à transfert de charge (registres CCD). Un spectromètre qui met en oeuvre le procédé de l'invention peut être de petite taille, mobile et permettre d'effectuer des mesures de spectre rapidement. Un mode de réalisation d'un spectromètre compact permet, grâce au miroir ménagé au centre du cercle de Rowland, de réduire davantage ces dimensions globales par un facteur de deux. Le procédé propose une division préliminaire en deux parties d'un flux de rayonnement examiné, les deux parties du flux étant dirigées séparément vers une grille à travers deux fentes (3) déplacées l'une par rapport à l'autre dans la direction perpendiculaire au plan du cercle de Rowland (2), puis vers les formateurs de signaux vidéo linéaires (6), alors que l'un des formateurs de signaux vidéo linéaires forme sur la base d'une partie du flux une partie de spectre qui constitue une extension continue d'une partie du spectre qui est formée sur l'autre formateur de signaux vidéo linéaires sur la base de l'autre partie du flux.
PCT/RU2005/000159 2004-04-01 2005-04-01 Spectrometre WO2005095910A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2004109716/28A RU2262086C1 (ru) 2004-04-01 2004-04-01 Способ измерения спектра излучения, спектрометр и малогабаритный спектрометр
RU2004109716 2004-04-01

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010520445A (ja) * 2007-02-28 2010-06-10 オリバ ジョビン イボン エス． アー． エス． 傾斜スリット分光器
CN102713541A (zh) * 2009-11-20 2012-10-03 堀场乔宾伊冯公司 具有凹面衍射光栅的光学分光计
WO2013074276A1 (fr) * 2011-11-14 2013-05-23 Symbol Technologies, Inc. Appareil pour et procédé d'alignement d'ouverture de lentille d'imagerie symétrique de manière non rotationnelle avec un capteur d'imagerie dans un dispositif de lecture d'imagerie
CN104296868A (zh) * 2014-10-15 2015-01-21 清华大学深圳研究生院 一种光谱仪的设计方法以及光谱仪
CN106525237A (zh) * 2016-10-24 2017-03-22 中国科学院国家空间科学中心 一种交叉车尼尔特纳结构多狭缝多光谱系统
CN113551876A (zh) * 2021-07-09 2021-10-26 安徽创谱仪器科技有限公司 一种光学仪器的定位系统、方法及光学仪器
CN116659665A (zh) * 2023-05-24 2023-08-29 广东中科谛听科技有限公司 一种全谱信号采集装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109283626B (zh) * 2018-11-06 2020-03-17 西安交通大学 紧凑的Bragg反射器型凹面衍射光栅波分复用器及其设计方法

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GB631748A (en) * 1947-01-29 1949-11-09 Hilger Ltd Adam Improvements in and relating to concave grating spectrographs
JPS56137232A (en) * 1980-03-31 1981-10-27 Japan Atom Energy Res Inst Multichannel direct incidence spectroscope
DE3621464A1 (de) * 1985-06-28 1987-01-08 Polska Akademia Nauk Instytut Optisches system eines monochromators
US5251007A (en) * 1989-11-27 1993-10-05 Kernforschungszentrum Karlsruhe Gmbh Dual-beam spectrometer
DE19523140A1 (de) * 1995-06-28 1997-01-02 Spectro Analytical Instr Mehrkanal-Spektrometer mit Zeilensensor
EP0862050A2 (fr) * 1997-02-28 1998-09-02 Instruments S.A., Inc. Spectrographe concentrique modifié
WO2002012950A1 (fr) * 2000-08-10 2002-02-14 Yuil Engineering Corp Procede d'analyse de spectre a unite multifentes et spectrographe multicanaux fonctionnant selon ce procede

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GB631748A (en) * 1947-01-29 1949-11-09 Hilger Ltd Adam Improvements in and relating to concave grating spectrographs
JPS56137232A (en) * 1980-03-31 1981-10-27 Japan Atom Energy Res Inst Multichannel direct incidence spectroscope
DE3621464A1 (de) * 1985-06-28 1987-01-08 Polska Akademia Nauk Instytut Optisches system eines monochromators
US5251007A (en) * 1989-11-27 1993-10-05 Kernforschungszentrum Karlsruhe Gmbh Dual-beam spectrometer
DE19523140A1 (de) * 1995-06-28 1997-01-02 Spectro Analytical Instr Mehrkanal-Spektrometer mit Zeilensensor
EP0862050A2 (fr) * 1997-02-28 1998-09-02 Instruments S.A., Inc. Spectrographe concentrique modifié
WO2002012950A1 (fr) * 2000-08-10 2002-02-14 Yuil Engineering Corp Procede d'analyse de spectre a unite multifentes et spectrographe multicanaux fonctionnant selon ce procede

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PATENT ABSTRACTS OF JAPAN vol. 006, no. 013 (P - 099) 26 January 1982 (1982-01-26) *
TOUZET B ET AL: "CONCAVE HOLOGRAPIC GRATINGS OPTIMISED FOR CCD OR DIODE ARRAY MATRIX SPECTROSCOPY", PROCEEDINGS OF THE SPIE, SPIE, BELLINGHAM, VA, US, vol. 1013, 1988, pages 146 - 153, XP009052013, ISSN: 0277-786X *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010520445A (ja) * 2007-02-28 2010-06-10 オリバ ジョビン イボン エス． アー． エス． 傾斜スリット分光器
CN102713541A (zh) * 2009-11-20 2012-10-03 堀场乔宾伊冯公司 具有凹面衍射光栅的光学分光计
CN102713541B (zh) * 2009-11-20 2015-01-28 堀场乔宾伊冯公司 具有凹面衍射光栅的光学分光计
WO2013074276A1 (fr) * 2011-11-14 2013-05-23 Symbol Technologies, Inc. Appareil pour et procédé d'alignement d'ouverture de lentille d'imagerie symétrique de manière non rotationnelle avec un capteur d'imagerie dans un dispositif de lecture d'imagerie
CN104296868A (zh) * 2014-10-15 2015-01-21 清华大学深圳研究生院 一种光谱仪的设计方法以及光谱仪
US10345149B2 (en) 2014-10-15 2019-07-09 Graduate School At Shenzhen, Tsinghua University Method of spectrometer and spectrometer
CN106525237A (zh) * 2016-10-24 2017-03-22 中国科学院国家空间科学中心 一种交叉车尼尔特纳结构多狭缝多光谱系统
CN113551876A (zh) * 2021-07-09 2021-10-26 安徽创谱仪器科技有限公司 一种光学仪器的定位系统、方法及光学仪器
CN113551876B (zh) * 2021-07-09 2023-11-07 安徽创谱仪器科技有限公司 一种光学仪器的定位系统、方法及光学仪器
CN116659665A (zh) * 2023-05-24 2023-08-29 广东中科谛听科技有限公司 一种全谱信号采集装置
CN116659665B (zh) * 2023-05-24 2024-05-03 广东中科谛听科技有限公司 一种全谱信号采集装置

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