A method of measuring the running error of telescope focusing is put for ward by using height differences of points in substituting a straight line for the traditional circular arc method.

• 本文提出一种用直线法确定各点高差代替传统的圆弧法确定各点高差来测定水准仪望远镜调焦运行差,将这种新的方法称作直线法。