摘要
为了标定试验设备空间位置,研制了一种像面位置可调的定焦距标星电视系统。星光经主镜和次镜反射后通过透镜组聚焦,成像在CCD靶面上;采用直线位移平台改变CCD靶面沿光轴方向的位置,直线位移误差不大于0.002mm,解决了由于温度变形使星像偏离CCD靶面产生成像不清晰的问题。通过可见光探测标星试验验证,定焦距标星电视系统的探测能力在夜晚、无云良好天气4等星可以实现图像捕获,在白天、无云良好天气,采用天空背景滤波情况下,3等星可以实现图像捕获。试验结果表明,该电视系统具有结构简单、装调方便、测量精度高等特点。
In order to determine the position of the theodolite,a star-observing TV system with adjustable image position and fixed focal length was developed.The incident ray from stars reflected by the main mirror and second mirror,was focused on the CCD target surface,after passed through the optical lens.By use of a linear displacement platform with the displacement error less than 0.002 mm to change CCD target face along optical axis,the defocus problem due to the structural deformation caused by temperature deviation was solved.The experiment indicated that the TV system could detect the 4 magnitude stars in the night with fine weather and partly cloud,and the 3 magnitude stars in daylight with fine weather and partly cloud by means of background filtering technology.It could be basically confirmed that the star-observing TV system had the merits such as simple structure,easy to assemble and high measurement accuracy.
出处
《光机电信息》
2011年第10期57-60,共4页
OME Information
关键词
定焦距
标星电视系统
直线位移平台
探测能力
fixed focal length
star-observing TV system
linear displacement platform
detectability
