【作者】 阎吉祥； 俞信； 温焱； 张晓芳； 赵承潭；

【Author】 YAN Ji-xiang, YU Xin, WEN Yan, ZHANG Xiao-fang, ZHAO Cheng-tan(Department of Optical Engineering, Beijing Institute of Technology, Beijing 100081, China)

【机构】 北京理工大学信息科学技术学院光电工程系；

【摘要】 全面测量光学系统像质的是它的点扩散函数(PSF)或光学传递函数(OTF)。影响光学系统MTF的3个主要因素是RMS波前误差、孔径中央遮挡比和RMS图像运动。它们决定了实际系统与理想系统相比时的像质下降量。给出了利用这些参数计算MTF的公式,以及Marechal判据来计算Strehl比的方法。更多还原

【Abstract】 The most complete measures of image quality for an optical system were its point spread function (PSF) and its optical transfer function (OTF). Three main factors affecting the optical system MTF were RMS wavefront error, central obstruction diameter ratio, and RMS image motion. They determined how much the image quality was degraded below that of a perfect lens. It is shown that how these parameters can be used in computing the MTF and Strehl ratio by relating them to Marechal’ s criterion.更多还原