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Particle diameter measurement device, and particle diameter measurement method

A technology for measuring device and particle size, which is applied in the direction of measuring device, particle size analysis, particle and sedimentation analysis, etc., and can solve problems such as difficulty in accurately measuring particle size

Inactive Publication Date: 2013-04-24
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, it is difficult to accurately measure the particle size with the particle size measuring device of the prior art

Method used

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  • Particle diameter measurement device, and particle diameter measurement method
  • Particle diameter measurement device, and particle diameter measurement method
  • Particle diameter measurement device, and particle diameter measurement method

Examples

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Embodiment 1

[0053] Examples of the particle diameter measuring method of the present invention will be described below. figure 2 Shown is the schematic configuration of the experimental system of the particle size measurement method. In this experimental system, the light source 10 is an Ar (argon) ion laser with λ=514.5 nm. The laser light irradiated by the light source 10 is converted into parallel light by the lens 30 a and converged by the lens 30 b to form a converging point in the flow path 20 . At this time, the diameter of the condensed beam at the condensed point was 5 μm. In addition, a polarizer 80 is provided on the diameter of the lens 30a and the lens 30b. In addition, in this experimental system, the particles flowing in the channel 20 are forcibly moved to the focal point position by using the optical radiation pressure formed by the focused beam, and the forward scattered light of the particles is detected. In addition, in this experimental system, if figure 2 As sh...

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Abstract

The purpose of the present invention is to measure the diameter of particles by placing a detector on the optical axis of a beam radiated from a light source, and detecting the forward-scattered light generated by particles contained in a particle swarm. Furthermore, the purpose of the present invention is the unique, accurate measurement of the diameter of particles while reducing as much as possible the amount of light from the light source that is directly incident without being scattered by the particles. [Solution] The present invention is basically based on the knowledge that particle diameter can be uniquely measured by measuring the maximum forward-scattered light intensity. In order to do so, the radiation pressure of a focused laser beam is used to induce particles contained in the particle swarm to the beam focus position, and the amount of directly incident light which has not be scattered by the particles is reduced as much as possible. The particle diameter measurement device and the particle diameter measurement method use the optical radiation pressure from the incident light to force the particles to move to the beam focus position, and detect the forward-scattered light.

Description

technical field [0001] The present invention relates to a device and method for measuring the particle size of particles in a flow path by using forward scattering (forward scattering), in particular to a method for measuring particles by using radiation pressure (radiation pressure) generated when laser beams converge. Particle size measurement device and particle size measurement method. Background technique [0002] Conventionally, there is a technique for monitoring the scattering state of compound particles contained in discharged smog and particles generated in the natural environment. [0003] However, this technique for monitoring particle size has poor real-time performance. Moreover, there is no technology capable of real-time monitoring of micron or nanoscale chemical substances in the prior art. In particular, a measurement technique using smaller and less costly devices is desired. [0004] In addition, for example, Japanese Patent Laid-Open Publication No. 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCG01N15/0205G01N21/4788
Inventor 岩井俊昭
Owner AISTHESIS
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