EP0215931A1 - Agencement de regulation individuelle de l'intensite de plusieurs lampes spectrales - Google Patents

Agencement de regulation individuelle de l'intensite de plusieurs lampes spectrales

Info

Publication number
EP0215931A1
EP0215931A1 EP86902308A EP86902308A EP0215931A1 EP 0215931 A1 EP0215931 A1 EP 0215931A1 EP 86902308 A EP86902308 A EP 86902308A EP 86902308 A EP86902308 A EP 86902308A EP 0215931 A1 EP0215931 A1 EP 0215931A1
Authority
EP
European Patent Office
Prior art keywords
intensity
lamps
radiation
spectral
arrangement
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP86902308A
Other languages
German (de)
English (en)
Inventor
Tetsuo Hadeishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gruen-Optik Wetzlar GmbH
Gruen Optik Wetzlar GmbH
Original Assignee
Gruen-Optik Wetzlar GmbH
Gruen Optik Wetzlar GmbH
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 Gruen-Optik Wetzlar GmbH, Gruen Optik Wetzlar GmbH filed Critical Gruen-Optik Wetzlar GmbH
Publication of EP0215931A1 publication Critical patent/EP0215931A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/3103—Atomic absorption analysis
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3922—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations and measurement of the incident light
    • 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
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J2001/4242—Modulated light, e.g. for synchronizing source and detector circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/3103—Atomic absorption analysis
    • G01N2021/3114—Multi-element AAS arrangements

Definitions

  • the invention relates to an arrangement according to the preamble of claim 1.
  • Absorption spectrometers in particular often contain a plurality of spectral lamps for generating a measurement radiation which is matched to the particular sample to be examined. If the lamps are activated individually one after the other, then their respective operating parameters can be regulated in a simple manner directly via the central supply device as a function of a measured variable derived from the measuring beam path. However, if the lamps are all activated at the same time and combined with the aid of deflecting mirrors to form a common measuring beam, then several regulators, which are arranged downstream of the common supply device, are necessary for the individual setting of the operating parameters of the individual lamps.
  • the invention was therefore based on the object of specifying an arrangement which can be used to adapt the intensity of a plurality of spectral lamps operated in parallel to one another in a simple manner as a function of a control variable derived from the total measuring beam.
  • this object is achieved according to the invention by the features specified in the characterizing part of claim 1.
  • Advantageous further developments result from the features of claims 2 to 4.
  • Figure 1 shows an arrangement with several control loops connected in parallel
  • Figure 2 shows an arrangement with an alternately tunable control loop.
  • the operating voltage of the hollow cathode lamp 1 is generated by a power amplifier 10 and z. B. modulated with a frequency of 2 kHz.
  • the hollow cathode lamp 2 is supplied by the power amplifier 20, which z. B. modulated with 9 KHz.
  • the radiation components are obtained by the respective modulation
  • Phase-coupled control loops 12, 22 phase-locked loops, PLL
  • automatic gain controllers 13, 23 automatic gain control, AGC
  • the frequency filter 110 arranged downstream of the photomultiplier 9 can be electronically tuned in this case.
  • the power amplifier 130 has two outputs with different frequency-modulated supply voltages for the lamps 1 and 2.
  • the gain control signal coming from the controller 13 is also supplied by the circuit arrangement 120 in synchronism with the tuning of the frequency filter 110 to the correspondingly modulated output signal of the power amplifier 130.
  • the supply voltage at the other output or possibly further outputs of the power amplifier 130 remains unregulated during this time.
  • the circuit arrangement 120 can also derive a control signal for the measuring circuit (not shown) arranged downstream of the absorption cell 7.
  • the signal evaluation can be further simplified by using digital frequency filters known per se.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

Un agencement de régulation individuelle de l'intensité de plusieurs lampes spectrales (1, 2) dont le rayonnement est rassemblé dans un seul trajet de rayonnement (4) se caractérise par le fait que les agencements de modulation de l'émission de chaque lampe spectrale (1, 2) ont des fréquences diverses, qu'un miroir diviseur (8) est introduit sur le trajet commun de rayonnement (4) afin de déclencher une partie du rayonnement total, qu'un récepteur photoélectrique (9) sert à générer un signal électrique proportionnel à l'intensité du rayonnement déclenché, et que des filtres de fréquences (11, 23) syntonisés avec les fréquences de modulation des lampes spectrales (1, 2) sont montés en aval du récepteur photoélectrique (9). Des régulateurs composés d'un circuit de régulation (12, 22) à phases couplées, d'une régulation automatique d'amplification (AGC) (13, 23) et d'un amplificateur de puissance (10, 20) sont subordonnés aux filtres de fréquence (11, 23) pour commander l'intensité de la lampe spectrale (1, 2) correspondante.
EP86902308A 1985-03-28 1986-03-29 Agencement de regulation individuelle de l'intensite de plusieurs lampes spectrales Withdrawn EP0215931A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3511255 1985-03-28
DE19853511255 DE3511255A1 (de) 1985-03-28 1985-03-28 Anordnung zur individuellen regelung der intensitaet mehrer spektrallampen

Publications (1)

Publication Number Publication Date
EP0215931A1 true EP0215931A1 (fr) 1987-04-01

Family

ID=6266569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86902308A Withdrawn EP0215931A1 (fr) 1985-03-28 1986-03-29 Agencement de regulation individuelle de l'intensite de plusieurs lampes spectrales

Country Status (4)

Country Link
US (1) US4815848A (fr)
EP (1) EP0215931A1 (fr)
DE (1) DE3511255A1 (fr)
WO (1) WO1986005941A1 (fr)

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DE3735130A1 (de) * 1987-10-16 1989-04-27 R Seitner Mess Und Regeltechni Plasmalichtquellenanordnung
DE3827322A1 (de) * 1988-07-05 1990-01-11 Spectruma Gmbh Geraet zur simultanen atomabsorptionsspektrometrie
DE3932421A1 (de) * 1989-09-28 1991-04-11 Cammann Karl Prof Dr Verfahren und vorrichtung zur messung von atomspektren zur bestimmung der menge eines gesuchten elementes
US5936716A (en) * 1996-05-31 1999-08-10 Pinsukanjana; Paul Ruengrit Method of controlling multi-species epitaxial deposition
US6075588A (en) * 1996-05-31 2000-06-13 The Regents Of The University Of California Integrated multi-channel optical-based flux monitor and method
US6181417B1 (en) * 1998-04-20 2001-01-30 Bayer Corporation Photometric readhead with light-shaping plate
DE19851863B3 (de) * 1998-11-10 2004-08-19 Cgk Computer Gesellschaft Konstanz Mbh Vorrichtung zur Beleuchtung von Formularen und zur Regelung der Beleuchtungsstärke
JP2000214231A (ja) 1999-01-27 2000-08-04 Ando Electric Co Ltd 電気光学サンプリングプロ―バ
US20070122344A1 (en) 2005-09-02 2007-05-31 University Of Rochester Medical Center Office Of Technology Transfer Intraoperative determination of nerve location
US20080161744A1 (en) 2006-09-07 2008-07-03 University Of Rochester Medical Center Pre-And Intra-Operative Localization of Penile Sentinel Nodes
US11540720B2 (en) * 2006-10-06 2023-01-03 Stryker European Operations Limited Methods, software and systems for imaging
US8406860B2 (en) 2008-01-25 2013-03-26 Novadaq Technologies Inc. Method for evaluating blush in myocardial tissue
US10219742B2 (en) 2008-04-14 2019-03-05 Novadaq Technologies ULC Locating and analyzing perforator flaps for plastic and reconstructive surgery
ES2671710T3 (es) 2008-05-02 2018-06-08 Novadaq Technologies ULC Métodos para la producción y uso de eritrocitos cargados con sustancias para la observación y el tratamiento de la hemodinámica microvascular
US10492671B2 (en) 2009-05-08 2019-12-03 Novadaq Technologies ULC Near infra red fluorescence imaging for visualization of blood vessels during endoscopic harvest
US10278585B2 (en) 2012-06-21 2019-05-07 Novadaq Technologies ULC Quantification and analysis of angiography and perfusion
WO2016049756A1 (fr) 2014-09-29 2016-04-07 Novadaq Technologies Inc. Imagerie d'un fluorophore cible dans une matière biologique en présence d'auto-fluorescence
CN107427247B (zh) 2014-10-09 2021-06-04 史赛克欧洲运营有限公司 使用荧光介导的光电容积描记法的组织中的绝对血液流动的定量
CN105207049B (zh) * 2015-10-29 2018-08-31 中国工程物理研究院激光聚变研究中心 激光光谱功率合成系统及方法
WO2018020535A1 (fr) * 2016-07-25 2018-02-01 株式会社島津製作所 Photomètre
WO2018145193A1 (fr) 2017-02-10 2018-08-16 Novadaq Technologies ULC Systèmes et procédés d'imagerie à fluorescence portative à champ ouvert
JP7211033B2 (ja) * 2018-11-27 2023-01-24 株式会社島津製作所 原子吸光分光光度計
CN114096039B (zh) * 2021-11-29 2024-02-02 四维生态科技（杭州）有限公司 一种基于频率调制的光谱调节系统及方法
CN116937965A (zh) * 2023-09-12 2023-10-24 晋江市高威电磁科技股份有限公司 一种数控软件控制的电源滤波器

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US3586441A (en) * 1967-07-12 1971-06-22 Instrumentation Labor Inc Atomic absorption spectroanalysis system
US3745349A (en) * 1971-11-18 1973-07-10 M Liston Single path,dual source radiant energy analyzer
US3928761A (en) * 1974-04-15 1975-12-23 Francis P Dunigan Photoelectric apparatus employing phase locked loop circuits
SE415397B (sv) * 1978-06-02 1980-09-29 Asea Ab Fiberoptiskt metdon
US4449821A (en) * 1982-07-14 1984-05-22 E. I. Du Pont De Nemours And Company Process colorimeter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8605941A1 *

Also Published As

Publication number Publication date
WO1986005941A1 (fr) 1986-10-09
US4815848A (en) 1989-03-28
DE3511255A1 (de) 1986-10-02

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Inventor name: HADEISHI, TETSUO