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Proceedings Paper

Study on broadening the size range in laser particle size measurement by combined spectrum technology
Author(s): Yong-jie Wei; Wen-chao Li; Bao-zhen Ge; Yao-lin Wei
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Paper Abstract

In laser particle size measurement, the instrument based on traditional Fourier transform structure is disadvantaged in the narrow measurable dynamic size range. So it is hardly to be used to measure broadly distributed particle. The presented technology is based on Fresnel diffraction theory. The formula of combined spectrum technology by detecting signals on coaxial focal planes is educed. In the proposed method, the two lenses are set coaxially and signals are detected on the back focal plane of the first lens and the combined back focal plane of the two lenses. The detected signals are then combined. The data are processed with a no-model algorithm. Thus, the measurable dynamic range can be broadened as no component of the sizer is changed. Experimental results of some samples show that the particulate in the size range of 5 ~ 3500 µm can be measured simultaneously.

Paper Details

Date Published: 3 February 2009
PDF: 7 pages
Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 71601E (3 February 2009); doi: 10.1117/12.805542
Show Author Affiliations
Yong-jie Wei, Tianjin Univ. (China)
Hebei Univ. of Technology (China)
Wen-chao Li, Tianjin Univ. (China)
Bao-zhen Ge, Tianjin Univ. (China)
Yao-lin Wei, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 7160:
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications

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