用成象自由度评价光学系统的信息量  

ASSESSING THE INFORMATION AMOUNT OF AN OPTICAL SYSTEM WITH THE DEGREES OF FREEDOM OF IMAGING

作　　者：金世荣[1] 李景镇[1] 

机构地区：[1]西安交通大学电子工程系,中国科学院西安光学精密机械研究所,710049,710068

出　　处：《光子学报》1992年第3期216-221,共6页Acta Photonica Sinica

摘　　要：本文探讨了一般光学系统的成象自由度传递及信息量问题,计算了不同信噪比σ_0/σ_n下一维相干光和非相干光照明的衍射受限系统的有效自由度数N_(off),并与经典分辨率理论的象素数作了比较。The problem of transmission of degrees of freedom of a general imaging system is discussed in this paper. The effective number of degrees of freedom of 1-D diffraction-limited system illuminated alternatively by coherent and incoherent light in the different cases of signal-to-noise ratio σo/σn, is figured out, and contrasted with the number of picture-elements based on the traditional resolving power.

关 键 词：成象 自由度 信息量 光学系统 

分 类 号：O435.2[机械工程—光学工程]