一、概述在量纲分析中,测量长度这个重要量纲的装置,正在社会上得到广泛研究和应用。在接触式长度测量装置中,有度盘式仪表、游标卡尺和测微计等,是产业界常用的测量工具。由于现代电子学的发展与工业生产效率的相互促进,生产中的自动化、轻型化浪潮汹涌,对非接触式快速、高精度地测量长度的要求更加紧迫了。针对这样的社会需要,促进了光学、超 I. Overview In dimensional analysis, measuring the length of this important dimension of the device, is widely studied in the community and application. In the contact length measurement device, a dial gauge, vernier caliper and micrometer, etc., is the industry’s most commonly used measurement tools. Due to the interaction between the development of modern electronics and the efficiency of industrial production, the wave of automation and light-weight production is raging. The demand for non-contact, fast and accurate measurement of length is even more pressing. For such a social need, has promoted optics, ultra