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Method for operating an FTIR spectrometer, and FTIR spectrometer

An operation method and spectrometer technology, applied in the operation of FTIR spectrometers and in the field of FTIR spectrometers, can solve problems such as expensiveness, and achieve simple and easy-to-handle verification and calibration

Inactive Publication Date: 2010-12-15
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Too expensive for most gases

Method used

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  • Method for operating an FTIR spectrometer, and FTIR spectrometer
  • Method for operating an FTIR spectrometer, and FTIR spectrometer
  • Method for operating an FTIR spectrometer, and FTIR spectrometer

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Embodiment Construction

[0036] figure 1 The schematic structure of an FTIR spectrometer, which is arranged, for example, on a Michelson interferometer is shown. Starting from the radiation source 5 , a parallel beam of light is generated by expansion with the aid of the first optical system 4 , which falls on the semi-transparent mirror 3 as beam splitting device. Light with a fixed wavelength and frequency position (monochromatic and correlated) now falls on the fixed mirror 1 and is reflected there. The other sub-beams pass straight through the mirror 3 and are reflected by the movable mirror 2 back in the direction of the mirror 3, where the two sub-beams now interfere with each other. This interference is controllably manipulated here by moving the mirror 2 along the optical axis. From there, the interfering light is transmitted through the measuring container 8 through which the measuring gas is guided. By means of the interferometer a very precise adjustment of the effective frequency positi...

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Abstract

The invention relates to a method for operating a FTIR (Fourier transformation infrared) spectrometer, wherein a validation / calibration of the spectrometer is carried out in cyclically recurring intervals in that by way of at least two temporarily available gases a reference spectrum with a zero gas and also an absorption spectrum with a calibration gas are recorded. The invention further relates to a spectrometer according to the preamble of the patent claims 1 and 8. In order to achieve that at each site of use and at any time a calibration or validation of the spectrometer can be carried out, the invention proposes to use so-called substitute gases during the validation of the spectrometer as gas components, said substitute gases only simulating the actual measured gas component with respect to the metrological properties.

Description

technical field [0001] The invention relates to a method of operating an FTIR (Fourier Transform Infrared) spectrometer according to the preamble of claims 1 and 8 and to the FTIR spectrometer itself. Background technique [0002] The FTIR spectrometer is an infrared spectrometer that works with the calculation method of Fourier transform. Such spectrometers do not work on the basis of specific absorption lines, but record the spectrum over the entire wavelength range and thus obtain information about the absorption on the observed spectrum or wavelength spectrum (Wellenlaengenspektrum) by means of mathematical spectrometer functions. A stoichiometric analysis is then performed on the basis of the distributions obtained and the distributions are assigned to the corresponding gas components. Therefore, multiple gas components can be measured simultaneously with an FTIR spectrometer. [0003] In order to pass through all the frequency ranges mentioned above, interferometer s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/27G01N21/35
CPCG01N21/3504G01N21/276G01N21/05G01N2021/3595G01J3/28G01J3/42G01J2003/2866G01J2003/2879G01N21/03G01N21/13G01N21/274G01N21/31G01N21/35G01N33/0004G01N33/0006G01N2021/0357G01N2021/0367G01N2021/3196
Inventor N·威尔B·希尔舍C·贝克尔B·安德列斯C·拉特克
Owner ABB (SCHWEIZ) AG
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