Multiple-passage dispersion reverse deduction microgranule tri-dimensional shape detector and detection method

Abstract

The invention discloses a detector and a detection method for inversing three-dimensional shape of micro-particle by multi-channel scattering. Experiment is carried in spherical scattering cavity, which is characterized in that in space of 30-150 DEG polar angle and 360 DEG azimuth angle, four optical fiber jacks are equipped every other 15 DEG to form nine parallel azimuth angle round surfaces, namely to form four pairs of circular conical surface symmetrical to azimuth angle round surface at 90 DEG polar angle direction; synchronously, thirty-six optical fiber jacks form two mutual vertical round surfaces each containing eighteen optical fiber jacks, included angles between the round surfaces and feeding particle beams are both 45 DEG. Semidiameter of each measuring point of particle is extracted by scattering signal, then shape information of particles are obtained by connecting the points, the semidiameter of measuring point of particles are obtained by perfect Mie scattering theoretics, wherein alpha=2pir / lambda, r is optical point correspondence semidiameter of particles.

Description

technical field [0001] The invention relates to the field of particle optics, in particular to a three-dimensional shape detector for micro-particles using multi-channel scattering inversion Background technique [0002] Particle shape and particle size are important parameters that affect the physical characteristics of microparticles, and are the basic references to characterize their characteristics. The particle size measurement technology is quite mature, and many technologies have been applied to laboratory or actual online detection. Compared with particle size measurement, the development of particle shape measurement lags far behind, and it has not been reported in China so far. Compared with only particle size analysis, the data obtained by measuring particle shape and particle size can provide richer information for the study of process kinetics. Taking into account the influence of particle shape parameters in the production process can monitor product quality ...

AI Technical Summary

Problems solved by technology

However, obtaining statistically meaningful results requires extensive time-consuming sample preparation, manual observation

The scattered light of particles is a function of multiple factors such as particle shape, and the shape information of particles can be quickly retrieved. However, the reported techniques either study the polar angle with a fixed azimuth angle, or study the azimuth angle with a fixed polar angle, and the scattering of particles is three-dimensional. Yes, only by starting with the inversion of multi-azimuth scattering information can it be possible to obtain accurate information about particle shape

Images