Multiple-passage dispersion reverse deduction microgranule tri-dimensional shape detector and detection method
A technology of three-dimensional shape and detection method, which is applied in the field of particle optics, can solve problems such as sample preparation and manual observation that take a lot of time, and achieve fast and accurate inversion results
Inactive Publication Date: 2010-08-04
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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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
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[0032] The multi-channel scattering inversion micro-particle three-dimensional shape detector is characterized in that it includes a scattering cavity 1, the surface of which is blackened, and the outer wall of the scattering cavity 1 is distributed with optical fiber jacks 2, and sampling holes are installed in the optical fiber jacks 2. The optical fiber 3, the top of the scattering cavity 1 is connected with the incident tube 4 of the sample particle beam, and its lower part is connected with the exit tube 5 of the sample particle beam on the same axis. A sheath flow tube 6, a plurality of modulating semiconductor laser modulators 7 are installed on the side wall of the scattering cavity 1, and the outgoing optical paths of each laser modulator 7 all intersect with the light that enters the scattering cavity 1 from the incident tube. A particle beam is injected, and an optical absorption tube 8 is installed on the opposite side of each laser modulator 7 .
[0033] The scatt...
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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 verticalround 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 isextracted 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 ...
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IPC IPC(8): G01N15/14G01N21/51
Inventor 邵士勇姚永帮朱文越饶瑞中
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI