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Proceedings Paper

Correlation function of angle-of-arrival measurements with one-dimensional Shack-Hartmann wavefront sensor
Author(s): Shengyang Huang; Wenyu Li; Pu Zhou; Yifeng Geng
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Paper Abstract

Laboratory turbulence generator has been established by heaters and fans. Turbulence of different strength is able to be simulated by changing the temperature. Plane Shack-Hartmann wave-front sensor is used to measure turbulence. The measurement indicates that turbulence has properties of locally homogeneity and isotropy approximately. One-dimensional Shack-Hartmann wave-front sensor with high temporal sampling frequency and spatial resolution is designed, which is made up of 28×1 cylindrical microlens array and linear CCD with frame frequency from 100Hz to 3000Hz. Wave-front after propagating through the laboratory generated turbulence is measured by the wave-front sensor. From displacement of the intensity centroid, the components of angle-of-arrival fluctuation in different positions along linear CCD direction are acquired. One-dimensional correlation function of angle-of-arrival is estimated. Under the hypothesis of locally homogeneous and isotropic random field, it is convenient to derive one-dimensional correlation function of angle-of-arrival by method of spectrum analysis of random processes with stationary increment. The result of experiment indicates that one-dimensional correlation function of angle-of-arrival confirms to the theoretical derivation approximately.

Paper Details

Date Published: 27 November 2007
PDF: 6 pages
Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 67231O (27 November 2007); doi: 10.1117/12.783190
Show Author Affiliations
Shengyang Huang, National Univ. of Defense Technology (China)
Wenyu Li, National Univ. of Defense Technology (China)
Pu Zhou, National Univ. of Defense Technology (China)
Yifeng Geng, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 6723:
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Junhua Pan; James C. Wyant; Hexin Wang, Editor(s)

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