光学学报, 2010, 30 (9): 2486, 网络出版: 2014-05-15
大气中的视觉和大气能见度 下载: 552次
Vision Through Atmosphere and Atmospheric Visibility
大气光学 大气能见度 视觉 辐射传输 斜程能见度 atmospheric optics atmospheric visibility vision through atmosphere radiative transfer slant-path visibility
摘要
表征大气对视觉影响的物理量是大气能见度,该物理量的具体定义在各种应用领域和研究文献中是比较混乱的。在气象领域,水平大气能见度已成为常规观测量。航空应用领域常常涉及到的斜程大气视线路径的能见度问题一直没有统一的标准。以物体与背景亮度的对比度为研究对象,详细探讨了大气中的视觉问题,澄清了水平能见度的概念,从辐射传输方程出发研究了斜程大气能见度问题,给出了典型大气条件下斜程大气能见度的基本特征,特别比较了向上和向下观察时能见度的区别。
Abstract
The physical quantity describing atmospheric effect on vision is visibility. The definitions of visibility have been diverse in different application areas and scientific literatures. Horizontal visibility was measured routinely in meteorology. There has been no standard visibility definition for slant path vision which is frequently occurred in such areas as aeronautics. Based on the radiance contract between object and atmospheric background the problem on vision through atmosphere is discussed. Definition of horizontal visibility has been clarified. The slant path visibility has been solved based on the radiative transfer equation. The general characteristics of the slant path visibility under model atmosphere are presented, and emphasis is paid on the difference between up-looking and down-looking visibility.
饶瑞中. 大气中的视觉和大气能见度[J]. 光学学报, 2010, 30(9): 2486. Rao Ruizhong. Vision Through Atmosphere and Atmospheric Visibility[J]. Acta Optica Sinica, 2010, 30(9): 2486.