Method and apparatus for adjustable multiple reflection optical absorptions

A technology of optical absorption and multiple reflection, which is applied in measuring devices, material analysis through optical means, scientific instruments, etc., and can solve problems such as instrument volume expansion

Inactive Publication Date: 2005-11-23
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the volume of the current instrument cannot be expa

Method used

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  • Method and apparatus for adjustable multiple reflection optical absorptions
  • Method and apparatus for adjustable multiple reflection optical absorptions
  • Method and apparatus for adjustable multiple reflection optical absorptions

Examples

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[0020] see Figure 1-Figure 5 .

[0021] Adjustable multi-reflection optical absorption method, the light emitted by the light source passes through the window (7) and hits the secondary reflector (4), and the secondary reflector (4) reflects and focuses the light beam onto the primary reflector (6), The light beam is reflected to the secondary reflector (3) by the primary reflector (6) again, and the secondary reflector (3) reflects the light beam from the window (9); adjust the position of the secondary reflector (3) so that The secondary reflector (3) rotates around the axis perpendicular to the paper plane, the number of light points projected on the primary reflector (6) increases, and the optical path is constantly adjusted; the gas enters the optical path from the air inlet (1), and the Vent (8) goes out.

[0022] Adjustable multi-reflection optical absorption device, through the four pull rods (11) of the square fixing base (2, 10), press the cylindrical glass cover ...

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Abstract

The invention discloses a apparatus and method for adjustable multiple reflection optical absorption, which adopts the principle of multiple reflection to design a optical absorbing pool; light beam multiple reflects by main reflector and two auxiliary reflectors so as to effectively accrete the length of detecting optical path in a small spacing. The multiple reflection optical absorbing pool has compact structure and can do alternative measurement to sample spectrum and background spectrum.

Description

technical field [0001] The invention relates to the field of environmental detection technology and analysis and optical technology, in particular to an adjustable multiple reflection optical absorption method and device. Background technique [0002] In environmental detection technology and analysis, near-infrared and mid-infrared absorption spectroscopy are used to measure trace gases in the atmosphere, because the absorption cross section of trace gases in the near-infrared band is very small. For a specific gas, at a specified wavelength, only by increasing the distance of the absorption cell can the detection sensitivity be improved. However, the volume of the current instrument cannot be expanded with the sample cell, so it cannot meet the actual demand. Contents of the invention [0003] The invention utilizes the principle of multiple reflections to design an optical absorption pool. The light beam is repeatedly reflected back and forth through the main reflecto...

Claims

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Application Information

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IPC IPC(8): G01N21/03
Inventor 陈军王亚萍董凤忠刘文清刘建国高闵光魏庆农陆亦怀张玉钧阚瑞峰高山虎方武
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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