The definition , application , key technology of the reverse engineering is summarized . based on the curve and the surface constructing theory of bezier , b - spline and nurbs , the methods of curve fitting and surface reconstructing are summarized , and the differences among these methods are compared . then each trait of them and their application in reverse engineering is summarized 在综合设计制造领域中常用的bezier 、 b -样条、 nurbs曲线、曲面的造型理论的基础上,对曲线拟合、曲面重构方法进行比较,总结出各自的特点以及在逆向工程中的具体应用; 2 .对线结构激光测量原理及其获取的点云数据的预处理、曲线拟合、曲面重构、误差评价方法等逆向工程造型过程进行了研究。
Diode - pumped q - switch solid - state lasers have many advantage such as high efficiency , compactness , high stability , and long lifetime . high peak power , high repetition rate short - pulse can be obtained by high power diode pumped , which is used comprehensively in the field such as measuring , remote sensing , photoelectric resisting , medical et 激光二极管( laserdiode ,简称ld )泵浦的调q固态激光器具有结构紧凑、稳定性好、寿命长等优点，用大功率ld作为泵浦源，可以获得高重复频率、大峰值功率的窄脉冲激光，这在激光测量、光电对抗、激光遥感、激光医疗等领域有着非常广阔的应用前景。
In precision length measurement , the environmental factors will not only cause the length variation of the measured object , but also influence the characteristic of laser ’ s measurement system and other metrical tools . thereby the measurement result is considerably influenced and it makes the precise measurement no sense 在精密长度测量中,测量环境温度的变化不但会使被测件的长度发生变化,而且还会影响激光测量系统,量块等测量工具的特性参数,给测量结果造成较大的影响,使精密测量失去意义。
