本文介绍一种用比较法测量粗磨棱镜角度的实用测角装置——棱镜量具。此法和传统的用角尺测量的方法相比,具有可靠和精度高的优点,其最高精度可达30″。一、测量原理棱镜粗磨以后,用活动角尺来检验角度,根据接触松紧或光缝大小来判别角度的误差,虽然工具简单,但精度难以掌握。用比 This article introduces a practical method of measuring angle measuring coarse grinding prism angle measuring device - prism measuring tools. This method compared with the traditional method of measuring with a square, with the advantages of reliable and high precision, the highest accuracy of up to 30. "First, the measurement principle Roughness prism, the angle of activity to test the angle, according to the contact elastic or light Seam size to determine the angle of error, although the tool is simple, but difficult to grasp the accuracy