一、前言角度自检是一种测量角度块的方法,它利用的是基准角度块和被测角度块之间的角度差,所有被测角的角度之和为2π弧度。这种方法不需要有角度基准而能获得较高的精度。它用来校准多面棱体和高精密分度台这样的角度基准是一种非常可行的方法。通常的角度自检方法,由于测量条件、环境等的影 I. INTRODUCTION Angle self-test is a method of measuring the angle block, which uses the angle difference between the reference angle block and the measured angle block. The sum of the angles of all the measured angles is 2π radians. This method does not require angular references to achieve higher accuracy. It is an extremely viable method to calibrate such angular references as polyhedron and high-precision index tables. The usual angle self-test method, due to the measurement conditions, the environment shadow