摘要
基于探测器采样原理,从空间域和频率域详细研究了探测器采样对光学综合孔径(OSA)成像质量的影响。在空间域,研究了OSA成像系统点扩散函数分布与探测器采样误差的关系;在频率域,基于探测器采样与光学传递函数的关系,研究了采样频率对OSA成像系统截止频率的影响,分析了成像系统欠采样的产生并进行了欠采样图像恢复仿真。实验结果表明,在OSA成像系统的设计中,要将探测器与光学系统适当匹配,才能获得最佳的图像性能。
The influences of detector sampling on optical synthetic aperture imaging quality are studied in detail based on the sampling theorem.Sampling frequency to the optical synthetic aperture imaging system is a fundamental design parameter for digital imaging systems.The interaction between detector sampling and image quality is sensitive to the point spread function and optical transfer function.Modulation transfer function and imaging quality under the different detector sampling are given by calculating.Restoration of undersampling image is researched.The results show that detector sampling has an important influence on optical synthetic aperture imaging and must be taken into account in the system design to improve the image quality.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2010年第3期424-429,共6页
Journal of Optoelectronics·Laser
基金
国家"863"计划资助项目(2007AA12Z114)
武器装备探索研究资助项目(7130730)
关键词
光学综合孔径(OSA)
光学传递函数
点扩散函数
采样
optical synthetic aperture（OSA）
optical transfer function
point spread function
sampling
