Chinese Journal of Lasers, Volume. 39, Issue 4, 408001(2012)
Analysis of Influence of CCD′s Nonlinear Response Characterization on Measurement Results of Focal Spot and Beam Quality
The far-field propagation model of annular plane beam through Kolmogorov atmospheric turbulence is presented and the nonlinear response characterization, such as so called "dead zone" and nonlinear saturation effect of CCD sensor are considered as well, the theoretical far-filed irradiance profiles of annular beam with obscuring ratio 0.5 under different turbulence strengths and their corresponding measurement results with CCD are calculated. The parameters of peak Strhel ratio RS, beam quality factor β and encircled energy ratio Ree are taken as evaluating far-field spot quality. The influence of dead zone and nonlinear saturation effect of CCD on measurement results of far-field spot profile and beam quality are analyzed, and the approaches to eliminate the measurement errors are discussed.
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He Yuanxing, Li Xinyang. Analysis of Influence of CCD′s Nonlinear Response Characterization on Measurement Results of Focal Spot and Beam Quality[J]. Chinese Journal of Lasers, 2012, 39(4): 408001
Category: measurement and metrology
Received: Oct. 13, 2011
Accepted: --
Published Online: Feb. 24, 2012
The Author Email: He Yuanxing (yuanxing-he@163.com)