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Sample pool capable of achieving multiple reflection and absorption

A technology of multiple reflections and sample cells, applied in the field of optical detection, can solve the problems of limited number of reflections and inability to achieve effective optical path, and achieve the effect of increasing the shuttle stroke and meeting the detection requirements

Inactive Publication Date: 2016-11-16
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the figure that this method is limited by the size of the spherical mirror, and its reflection times are limited. When measuring ultra-trace gases, it still cannot reach the effective optical path

Method used

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  • Sample pool capable of achieving multiple reflection and absorption
  • Sample pool capable of achieving multiple reflection and absorption
  • Sample pool capable of achieving multiple reflection and absorption

Examples

Experimental program
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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] Such as Figure 5 As shown, a multiple reflection absorption sample cell is characterized in that: it includes a tubular shell 25 sealed at both ends, and a reflective assembly arranged inside the tubular shell 25;

[0026] One of the end faces of the tubular housing 25 is provided with a light incident window 29 and a light exit window 31, and the light incident window 29 and the light exit window 31 are provided with windows made of infrared-transmitting band materials. The tubular housing 25 The two ends of the circumferential surface are respectively provided with an air inlet 33 and an air outlet 35;

[0027] Such as Image 6 As shown, the reflective assembly includes a primary mirror 1 and a secondary mirror 3, the primary mirror 1 is composed of a spherical mirror, and the secondary mirror 3 is composed of two spherical mirrors, that is, a first spher...

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Abstract

The invention belongs to the technical field of optical detection, and particularly relates to a sample pool capable of achieving multiple reflection and absorption. The sample pool comprises a tubular shell with two closed ends, and a reflecting assembly arranged inside the tubular shell, wherein a light inlet window and a light outlet window are arranged on one end surface of the tubular shell; a window plate made of an infrared-permeable material is arranged on each of the light inlet window and the light outlet window respectively; a gas inlet and a gas outlet are formed in the two ends of a circumferential surface of the tubular shell. A right-angled reflecting mirror is arranged near the edge of a main mirror, and when reflected light shifts out of the main mirror, a reflecting point on the side of the main mirror is shifted by the right-angled reflecting mirror to form a new reflecting path so as to double the reflecting journey; therefore, the traveling journey of infrared wave is greatly increased and the detection need of ultramicro gas is met.

Description

technical field [0001] The invention belongs to the technical field of optical detection, and in particular relates to a multiple reflection absorption sample cell. Background technique [0002] In the prior art, a spectrometer is often used to detect the gas concentration. The principle is that when the infrared beam passes through the gas to be measured, the gas will absorb the infrared signal. According to the Lambert-Beer law, the absorbance of gas molecules is proportional to the absorption path, the concentration of gas molecules and the absorption coefficient of gas molecules. Different gas molecules have different gas molecule absorption characteristics. Therefore, the concentration of absorbed gas molecules can be quantitatively retrieved by performing spectral analysis on the absorbance spectrum after gas absorption. However, when the gas concentration is too low, the absorbance of the gas molecules is weak, and the absorption spectrum is not obvious. At this tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/35
CPCG01N21/01G01N21/3504G01N2021/0112G01N21/031
Inventor 李相贤王亚萍石建国童晶晶李胜陈军高闽光张玉钧刘文清
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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