一、前言随着光学、电子学及其应用技术的迅速发展,长度与角度检测以及应用这项技术的测试技术取得明显的进展。传感器的发展,尤其是电子化,数字化的发展有力的推动了测试技术的发展。由于角度测量是从长度测量范畴内分类出来的,因此传感器在原理上存在某些共同之 I. Introduction With the rapid development of optics, electronics and their application technologies, significant progress has been made in the measurement of length and angle as well as the testing techniques applying this technology. The development of sensors, especially the development of electronics and digitization, has strongly promoted the development of testing technology. Because angular measurements are categorized within the length measurement range, there are some common principles with sensors