A laser measuring device

Abstract

The embodiment of the present invention discloses a laser measurement device, comprising: a laser, a collimating optical element, a liquid containing device and an image acquisition module; the liquid containing device is used for containing the liquid to be measured; the laser is located in the One side of the liquid containing device is used for emitting a laser beam; the collimating optical element is located between the laser and the liquid containing device, and is used for collimating the laser beam. The laser beam is emitted to the liquid containing device; the image acquisition module is arranged behind the liquid containing device along the propagation direction of the laser beam incident on the liquid containing device, and is used for collecting the laser beam A speckle image of the transmitted light formed after being irradiated to the liquid container.

Description

technical field [0001] The invention relates to the technical field of instruments and meters, in particular to a laser measuring device. Background technique [0002] In the propagation of light, the wavefront is restricted by pores or particles with a wavelength scale, and the emission of each element wave at the restricted wavefront as the source interferes in space to produce diffraction and scattering, and the space of diffracted and scattered light energy The (angular) distribution is related to the wavelength of the light wave and the size of the pores or particles. Using a laser as a light source, the light is monochromatic light with a certain wavelength, and the spatial (angular) distribution of diffracted and scattered light energy is only related to the particle size. For the diffraction of particle groups, the size of each particle level determines the amount of light energy obtained at each specific angle, and the proportion of light energy at each specific an...

AI Technical Summary

Problems solved by technology

[0003] Existing laser particle size analyzers generally use a surface-emitting laser combined with a beam expander to expand the beam emitted by the surface-emitting laser through the beam expander to measure the particle size of the gas. The light energy density of the solid-state laser emitting in the direction of the bottom surface limits the accuracy of the measurement results; secondly, when this kind of laser particle size analyzer measures the particle size of the liquid, its measurement accuracy will be affected by the material of the selected measuring cup and the placement position. etc., thus affecting the application range of the laser particle size analyzer

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