Design of small-size sample pool reflected for many times

A sample cell, small volume technology, applied in the field of absorption spectroscopy, can solve problems such as small size, and achieve the effects of compact size, simple production, and reduced cost of the instrument

Pending Publication Date: 2019-08-20
常州龙新激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a design with a smaller volume aiming at the shortcomings of the existing multiple round-trip reflection sample cell technology

Method used

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  • Design of small-size sample pool reflected for many times
  • Design of small-size sample pool reflected for many times

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Spherical concave mirror with a diameter of 25 mm and a radius of 50 mm, coated with a protective gold film after optical polishing;

[0023] (2) Two circular holes with a diameter of 2 mm are processed at the center of the spherical concave mirror and 8 mm away from the center.

[0024] (3) Two spherical concave mirrors are fixed in the vacuum-sealed device, and one of the two metal blocks fixing the concave mirrors can be rotated and adjusted to facilitate the entry and exit of light beams.

[0025] (4) The distance between the two concave mirrors can be changed by changing the length of the sealing material between the metal blocks fixing the two concave mirrors, usually a cylindrical material, and the distance can be adjusted between 28mm and 29mm.

[0026] (5) The incident light passes through the hole with a distance of 8 mm and enters the opposite concave mirror at a distance of more than 5 mm. By finely adjusting the incident angle and changing the distance ...

Embodiment 2

[0028] (1) Spherical concave mirror with a diameter of 50 mm and a radius of 100 mm, coated with a protective gold film after optical polishing;

[0029] (2) Two circular holes with a diameter of 2.5 mm are processed at the center of the spherical concave mirror and 19 mm away from the center;

[0030] (3) Two spherical concave mirrors are fixed in a vacuum-sealed device, and one of the two metal blocks fixing the concave mirrors can be rotated and adjusted to facilitate the entry and exit of light beams;

[0031] (4) The distance between the two concave mirrors can be changed by changing the length of the sealing material between the two metal blocks that fix the concave mirror, usually a cylindrical material, and the distance can be adjusted between 50mm and 55mm;

[0032] (5) The incident light passes through the hole at a distance of 19 mm and the distance to the opposite concave mirror exceeds 12 mm. By carefully adjusting the incident angle and changing the distance betw...

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Abstract

The invention relates to a design of a small-size sample pool reflected for many times for absorbing spectrum measurement. The sample pool comprises two spherical concave-surface reflecting mirrors, one or several light through holes are formed in positions, far away from the center, of each concave-surface reflecting mirror, and the distance between the two concave-surface reflecting mirrors of the sample pool can be adjustable within 30-150% of focus.

Description

technical field [0001] The invention belongs to the technical field of absorption spectroscopy, and designs a multi-reciprocating reflection sample cell with small volume and long optical path, and has the characteristics of low cost and easy use. Background technique [0002] Absorption spectroscopy is a common method for measuring chemical substances in samples, where the measurement accuracy and limit follow Lambert’s law, that is, I / Io=EXP(-α*l*C), where I / Io is transmitted light and emitted light The ratio of , that is, the transmittance, α is the sample absorption cross section, l is the absorption length, and C is the sample concentration. [0003] From the above, the measurement accuracy, that is, the minimum measurement concentration and accuracy depends on the absorption length. The longer the length, the lowest concentration that can be measured and the highest level of accuracy increase proportionally. The most effective way to increase the absorption length is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/59G01N21/01
CPCG01N21/01G01N21/59G01N2021/0112G01N2201/0668
Inventor 吴平易吴晟
Owner 常州龙新激光科技有限公司
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