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Optical analysis apparatus and method of gas

A light source and light collimation technology, applied in the field of photoelectric analysis, can solve problems such as poor beam collimation effect, poor optical interference noise suppression ability, aberration, etc., to reduce adverse effects, suppress optical interference noise, and reduce light source cost Effect

Active Publication Date: 2016-11-09
HESAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the angle between the lens axis and the optical axis is small, the ability to suppress optical interference noise is poor; when the angle between the lens and the optical axis is large, there will be serious aberrations, and the beam collimation effect will be poor

Method used

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  • Optical analysis apparatus and method of gas
  • Optical analysis apparatus and method of gas

Examples

Experimental program
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Effect test

Embodiment 1

[0044] figure 1 Schematically provides a structural diagram of the novel light source of this embodiment, as figure 1 As shown, the novel light source includes:

[0045] The luminous body 11 is used to emit monochromatic light; the luminous body is fixed on the first bracket;

[0046] The first bracket 21, such as a circular sleeve, a mounting plate, etc., the bracket is used to carry the illuminant, and the bracket is formed with an optical channel suitable for the passage of the emitted light of the illuminant;

[0047] Light collimating device 81, such as plano-convex lens, described light collimating device is fixed on the optical path of the outgoing light of described illuminant, collimates described outgoing light; The axis of described light collimating device and described outgoing light The angle between the optical axes is an acute angle, such as 2 degrees, 10 degrees, 25 degrees, etc., but not more than 30 degrees;

[0048] Rotating member 31, the optical collim...

Embodiment 2

[0052] The laser gas analyzer of the embodiment of the present invention, the laser gas analyzer comprises:

[0053] new light sources, such as figure 2 As shown, the novel light source includes:

[0054] The illuminant 11 is a tunable semiconductor laser;

[0055] The first bracket 21 adopts a circular sleeve with a radial part and an axial part, and the illuminant is fixed at the center of the radial part; the part 22 of the axial part is used as the second bracket;

[0056] The rotating member 31 adopts a bearing, and the outer ring of the bearing is fixed on the second bracket, that is, the inner side of the axial part;

[0057] The fixing part 41, the fixing part adopts a sleeve, and is fixed on the rotating part, that is, on the inner ring of the bearing;

[0058] The optical collimation device 81 adopts a plano-convex lens, and the lens is fixed in the fixture, and the angle between the axis of the lens and the optical axis of the measuring light emitted by the lase...

Embodiment 3

[0068] The laser gas analyzer of the embodiment of the present invention, such as figure 1 Shown, different from embodiment 2 is:

[0069] 1. Fixing parts are no longer used, and the optical collimation device is directly fixed on the inner ring of the bearing. The motor directly drives the inner ring to rotate, and the driving wheel of the motor drives the inner ring by friction;

[0070] 2. The second bracket is set separately, and the outer ring of the bearing is fixed on the second bracket; the measurement light emitted by the laser passes through the optical collimation device, and the angle between the optical axis and the axis of the optical collimation device is Acute angles, such as 10 degrees, 15 degrees, 20 degrees, 30 degrees, etc.

[0071] The above-mentioned embodiments are only exemplified that the illuminants are lasers, and of course other illuminants, such as LEDs, may also be used.

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Abstract

The invention provides an optical analysis apparatus and method of gas. The analysis apparatus adopts a novel light source, and comprises a luminous body, a first support, an optical collimation device, a rotating part, a second support and a motor, wherein the luminous body is fixed on the support; the first support is used for carrying the luminous body; the optical collimation device is fixed on a light path of light emitted by the luminous body and used for collimating the outgoing light; an angle between the axis of the optical collimation device and an optical axis of the outgoing light is an acute angle; the optical collimation device is fixed on the rotating part; the rotating part is rotatably arranged on the second support; and the motor is used for driving the rotating part and the optical collimation device to rotate. The optical analysis apparatus has the advantages of high precision, simple structure, low cost and the like.

Description

technical field [0001] The invention relates to photoelectric analysis, in particular to a novel light source and an optical analysis device and method for the gas of the light source. Background technique [0002] In gas sensors, the output light from diode lasers is highly divergent, requiring the use of collimating optics, such as collimating lenses. The introduction of the collimating lens will cause interference between the laser and the lens: the laser emitted by the laser and incident vertically on the rear surface of the lens will be partially reflected back to the laser, reflected at the front window of the laser, and then perpendicularly incident on the rear surface of the lens again. The outgoing light twice before and after will form an interference. In the process of measuring gas absorption signals, the fringes formed by interference will greatly reduce the gas detection limit, so it needs to be avoided or eliminated as much as possible. [0003] Traditional ...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/39
CPCG01N21/01G01N21/39
Inventor 陶俊李娜向少卿孙文婷李一帆
Owner HESAI TECH CO LTD
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