巧用分划板测望远镜的放大率

Ingenious application of reticle in measuring the magnification of telescope

提出巧用分划板测量自组望远镜放大率的新方法,并通过实验实例将视觉直接测量法、使用分划板测量的方法进行对比。实验发现,相比视觉直接测量法,采用分划板的方法测量不仅受人的主观因素影响较小,而且易操作、读数也简单。更重要的是采用分划板的方法测量,数据百分误差较小,相比视觉直接比较测量法减小了18.00%—27.00%,其放大率更接近理论值。

In this paper,it is proposed that reticle be applied in measuring magnification of telescope. In addition,we compare the methods of direct visual measurement with reticle measurement in an experiment. The study suggests that,compared with direct visual measurement,the reticle measurement is less likely to be constrained by human＇s subjective judgment in measurement; more importantly,and it is easy to be operated and read. On top of that,the error by reticle measurement method is rather small,having been reduced 18. 00%- 27. 00% compared with direct visual measurement,and the magnification of reticle measurement method is close to the theoretical value.