摘要
基于一种长焦距斜视实时航空相机的研制,探讨了导致相机离焦的原因,指出环境(大气压力、温度)变化和照相斜距的变化是导致相机离焦的主要原因,分别从温度、大气压力、照相斜距这三个方面的变化对相机离焦的影响进行讨论,给出了计算相机离焦量的简易数学方程。通过对相机斜距离焦的分析,提出了一种新的离焦补偿方法,研制出一种双层导轨、双层凸轮的自动调焦补偿机构,使相机在照相过程中保持像面稳定,并对斜距调焦原理进行了实际检验。
Based on the experience gained from the development of a long focus, oblique, real_time, aerial camera, it is pointed out that the camera maybe out of focus is due to changes in temperature, atmospheric pressure and oblique photographic distance. The effect of these three factors on a camera is discussed and a simple mathematical equation is proposed for calculation of how much a camera is out of focus. A new simple method is to compensate out of focus of oblique photographic distance. The principle is very easy to implement. Finally, the paper introduces a auto_focusing system with double_deck guideway and double_deck cam, and its focusing of oblique photography is tested.
出处
《光学精密工程》
EI
CAS
CSCD
2003年第2期162-165,共4页
Optics and Precision Engineering
基金
中国科学院长春光学精密机械与物理研究所一期创新项目
关键词
航空相机
离焦补偿
温度
大气压力
照相斜距
out of focus
atmospheric temperature
atmospheric pressure
oblique photographic distance
