摘要
为了使光学机械结构设计满足成像系统的要求,对机械振动对光学调制传递函数(MTF)的影响做了分析。从光学成像系统物像相对振动的形式入手,基于刀口理论(线扩展函数),用MTF作为评价函数,针对各种振动形式对图像分辨率的影响进行量化分析,并分析各种参数对MTF的影响,为光学机械的强度、刚度、和精度设计提供了理论基础。结合工程实际,提出减小振动对成像质量影响的具体措施;通过对某成像设备中振动对MTF影响的分析,计算出其动态分辨率为22 lp/mm,与实际拍摄结果较为接近;说明了该分析的正确性及其可用性。
In order to make the Opt-Mec design meet the requirements of imagine systems, the impact of mechanical vibration on the Modulation Transfer Funtion（MTF） is analyzed. By considering the form of optical imaging system to vibration and taking the MTF as an evaluation function, this paper quantitatively analyzes the impacts of various forms of mechanical vibration on image resolution and discusses the influence of each kind of parameter on the MTF based on the knife-edge theory （Line Spread Function, LSF）. These analysises provide theory basis for the intensity, rigidity and the precision design of optics machinery. Combining engineering practice, several kinds of schemes are proposed to reduce the impact of vibration on the imaging quality. Through the MTF analysis for a imaging equipment, the dynamic resolution of 22 lp/mm for a imaging equipmen is obtained, which is close to the actual photograph result. The results indicate that the analysis is correct and usable.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2009年第2期314-320,共7页
Optics and Precision Engineering
基金
国家863高技术研究发展计划资助项目(No.2007AA701203)
关键词
成像系统
机械振动
光学调制传递函数(MTF)
图像分辨率
量化分析
imaging system
mechanical vibration
Optical Modulation Transfer Function （MTF）
image resolution
quantitative analysis
