锥体棱镜是激光光波精密测长装置中的一个重要部件。由于精度要求高,尤其是三直角误差α、β、γ均要求在1″以内,致使加工工艺和检测都变得极其困难了。本文根据光的反射原理,试用矢量投影法,算出平行差这样一个普遍关系,据此又规定了δ=2.5″作为判断其质量的标准(优等:α、β、γ皆<1″;次等:α、β、γ>1″),实验证明是正确的。 Cone prism laser laser precision measuring device is an important component. Due to the high precision, especially the three right-angle errors α, β and γ are all within 1 “, which makes the machining process and testing extremely difficult.In this paper, according to the principle of light reflection, try the vector projection method to calculate the parallel difference A universal relationship, according to which again the provisions of δ = 2.5 ”as a criterion to judge its quality (superior: α, β, γ are all“ 1 ”; second: α, β, γ> 1"), the experiment proved to be correct .