LIU Jin-long,YANG Hui-zhen,LI Xin,FANG Zhou.Error analysis and threshold selection in model-based wavefront sensorless adaptive optics system[J].Optoelectronics Letters,2020,16(5):327-332 Error analysis and threshold selection in model-based wavefront sensorless adaptive optics system Author Name Affiliation LIU Jin-long  Jiangsu Ocean University, Lianyungang 222005, China  YANG Hui-zhen  Jiangsu Ocean University, Lianyungang 222005, China Jiangsu Marine Resources Development Research Institute, Lianyungang 222005, China  LI Xin  Jiangsu Ocean University, Lianyungang 222005, China  FANG Zhou  China University of Mining and Technology, Xuzhou 221116, China  Abstract:       Accurate values of masked detector signal (MDS) is the key to the correction capability of wavefront sensorless (WFSless) model-based adaptive optics (AO) system. However, imaging detectors always carry different kinds of noises in real applications, which make MDS deviate from theoretical results. Calculation errors of MDS suffered from the noise were analyzed through theory and simulation. Additionally, considering the method of threshold is usually used to mitigate the noise, we also discussed the influence of threshold on MDS. Results showed that the simulation is consistent with the theory and there exists an optimal threshold to make the error minimum for different noise. A fitting formula, which can accurately calculate optimal thresholds, was proposed based on the simulated data. Above results can provide a plausible method and theoretical basis to mitigate imaging noise of detectors in real applications. Hits: 1711 Download times: 0 View Full Text    Download reader