光学精密工程2025，Vol.33Issue(21)：3431-3440,10.DOI:10.37188/OPE.20253321.3431
基于哈特曼波前传感器的白天天光背景时空特性分析
Daytime sky background spatio-temporal analysis using Hartmann wavefront sensor
摘要
Abstract
To address strong sky background interference in daytime adaptive optics(AO)systems,a method is proposed to quantitatively evaluate sky brightness distribution and its impact on observations by calibrating the Hartmann wavefront sensor to compute the equivalent magnitude of the sky background,without introducing additional equipment.Experimental results indicate that the equivalent magnitude of the sky background decreases with increasing solar elevation and with decreasing observation elevation an-gle;during typical target tracking,sky background brightness can vary by approximately one magnitude at a fixed azimuth.The computed magnitudes exhibit strong agreement with the Kasten-Young linear air mass model.Spatio-temporal analysis of the Hartmann target surface shows that mean grayscale values dif-fer significantly among sub-apertures,while their short-term fluctuation trends remain consistent.The standard deviation of sky background image fluctuations is substantially larger in the spatial domain than in the temporal domain,with an approximate ratio of 1.68.Consequently,effective daytime target observa-tion requires attention to spatial nonuniformity within sub-apertures and implementation of dynamic pixel-wise sky background modeling.The proposed method and experiments provide quantitative data to sup-port dynamic parameter adjustment and noise suppression in AO systems,thereby improving daytime ob-servation efficiency and target detection capability.关键词
自适应光学/白天天光背景/哈特曼波前传感器/星等/时空特性Key words
adaptive optics/daytime sky background/Hartmann wavefront sensor/stellar magnitude/spatio-temporal characteristics分类
数理科学引用本文复制引用
欧阳朴秀,陈凯余,郭友明,饶长辉..基于哈特曼波前传感器的白天天光背景时空特性分析[J].光学精密工程,2025,33(21):3431-3440,10.基金项目
国家自然科学基金资助项目(No.12173041,No.12261131508) （No.12173041,No.12261131508）
