摘要
介绍了一种小型化的自动检焦装置 ,该装置用 2块小口径五棱镜对径放置在镜筒前 ,用半导体激光器做光源 ,用CCD作为光电转换器件 ,通过测量两光斑在CCD上的移动量 ,从而计算出离焦量 .采用相关法处理数据 ,实现了亚像素测量精度 .实验结果表明检焦分辨率力≤ 10 μm .
A novel auto-collimation method is introduced, in which two small pentagonal prisms are substituted for a large mirror, a low-power laser is used as the light source and CCD as photoelectric converting device. The defocus is calculated by measuring the displacement of two light spots imaged on the CCD. The correlation method is used to process the data and then obtain the sub-pixel measuring precision. The experiments show that the measuring resolution is less than 10 μm.
出处
《物理实验》
北大核心
2004年第2期23-25,共3页
Physics Experimentation
