【摘要】 根据桥梁挠度光电成像测量系统的要求 ,分别对实际野外工作条件下 ,系统的像面照度、成像对比度等光度学特性进行了分析、计算 ,讨论了系统的发光靶标、背景光、光电数字摄像机等系统参数与环境之间的相互制约关系 ,并讨论了在强烈日光条件下 ,用高反射率材料代替发光靶标以提高成像对比度的可能性 提出了桥梁挠度的光电成像测量系统设计中 ,系统参数选择的光度学设计准则更多还原

【Abstract】 The calculation of the photometric characteristics such as image plane′s illumination and contrast are presented according to the demand of photoelectric imaging deflection measurement system. The relationship between the source, background radiation, optical system and image sensor is analyzed. Illumination and contrast on the image plane of camera are also discussed when replacing the system′s source with high reflectivital material or using material with low reflectivity replacing background. The result contributes to putting forward the method of photometric design of photoelectric imaging deflection measurement system.更多还原