传统的自准直法由于人眼的局限性，难以准确判断清晰像位置，测量精度不高。采用目镜组做像屏，用与分划板共面的十字架图案做物屏，采取消视差的方法判断像的位置，改进了传统的自准直法测量透镜焦距的实验方法，实验装置简单，结果准确，无需光源。% Since the experiment effort was large in focal length measurement of thin lens by traditional auto-collimation method because of the clear image can not be found exactly. By use of eyepiece with cross reticule to observe image, using a plate with a cross pattern as object screen, and using the method of eliminate optical parallactic error to estimate accurately the image, the traditional auto-collimation method to measure focal length of thin lens was improved in the thesis. Experiments showed that the experiment device was simple, and the result was correct.
展开▼
