摘要
在航空摄影中,会由于温度、气压参数变化,使相机像面发生离焦。光栅自适应检调焦方法,性能可靠、环境适应性强,是摆镜式航拍相机自动检调焦的首选技术。本文用光栅成像自适应原理,阐述了光栅参数与摆镜角速度、光电接收时间的关系,设计出实用机构。应用此技术,使自动检调焦的焦平面位置,达到像面1/4焦深以内,通过飞行验证,图像优良。该技术适用于有反射摆镜结构的长焦距相机。
In aerial photography,the variation of temperature and pressure make the camera defocusing.With high reliable and great adaptive capacity to environment,the raster self-adapting detection focus method will be the preferred technology on automatic focus.This paper explains the relation of raster parameter,swinging mirror angular velocity and photoelectric receiving time using principle of raster self-adapting imaging,and designed mechanics for it.The focus plane depth will be within the quarter.The imaging has high quality after flight experiment.This technology can be applieed to telephoto camera with the swinging mirror structure.
出处
《长春理工大学学报（自然科学版）》
2011年第2期8-11,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
光栅
自校准
自动检调焦
grating
self-calibration
auto-focusing
