CAJ | 학술논문

采用虚拟点光源虚像法测量了透镜焦距，该方法可以规避传统焦距测量中需要对像平面的位置进行精准判定的难题。利用短焦透镜和激光器模拟点光源，使发出的光线穿过待测透镜及另一侧的光阑照在光屏上，形成光斑，通过CCD映象技术测量光斑直径及光阑到光斑的距离，从而得到透镜焦距。
채용허의점광원허상법측량료투경초거，해방법가이규피전통초거측량중수요대상평면적위치진행정준판정적난제。이용단초투경화격광기모의점광원，사발출적광선천과대측투경급령일측적광란조재광병상，형성광반，통과CCD영상기술측량광반직경급광란도광반적거리，종이득도투경초거。
The virtual image method with virtual point light source was presented to measure the foci of convex lens based on the formation principle of virtual point light resource .By using this meth‐od ,the difficulty of precisely predicating the accurate position of image plane in the focal length meas‐urement could be avoided .Specifically ,take advantage of the short focal lens and laser to simulate the point light source ,the light passed through the lens could be focused into a spot on the screen at the other side of the diaphragm .The focal length of the lens was obtained by measuring the spot diameter and the distance between the diaphragm and the light spot based on CCD imaging technology .