针对常见的工业零部件尺寸，基于锥光全息测量原理，设计一套高精度非接触式锥光全息测量系统，并用于测量钱币表面的高度信息。首先记录钱币的锥光全息图，接着对全息图的干涉条纹进行中心线细化处理，用以计算条纹宽度变化量，进而得到被测钱币表面高度的变化。实验结果表明，当物镜焦距为50 mm 时，该测量系统的精确探测范围达到5 mm，测量误差在0.28%之内，验证了该系统设计方案的可行性和准确性。

Based on the principle of conoscopic holography, a high-precision non-contact measure system is designed for the measurement of typical industrial parts. Using this system, height information of coin surface is acquired. After recording of the conoscopic holograms of the coin, the interference fringes are processed by centerline refinement, through which we can calculate the variation in the fringe width, and thus obtain the height information of the coin surface. The results show that when the focal distance of objective is 50 mm the accurate measurement range of the system is 5 mm, with a maximum error of 0.28%, verifying the feasibility and accuracy of the conoscopic holographic measure system.