夫琅禾费单缝衍射法测透镜焦距的研究

Study of convex lens length by Fraunhofer single-slit diffraction

主要采用激光作为光源,通过不同的接收方法(白屏和测微目镜),测量了透镜的焦距,同时与自准直法获得的结果进行比较,结果表明采用白屏和测微目镜作为接收屏取得的实验结果更精确。因此,给出了可靠的测量透镜焦距的方法。

In this paper, the different access approachs （white blank and ocular micrometer ） of convex lens length was used to measure the convex lens foci and the laser was as light source. Comparing with autocollimation method, the results was show that the accurate results can be obtained by white blank and ocular micrometer as access approachs. Therefore, it presents a reliable method to measure lens focal length.