大口径光学非球面轮廓测量过程可视化研究

研究了大口径非球面光学元件表面轮廓测量过程可视化，并设计、开发了基于双向链接边表的软件系统。提出一种改进的双向链接边表数据结构完成三维模型加载方法，建立数据结构及其相关图形元作为软件的基础层。计算非球面曲面方程获得表面轮廓的数据生成图形场景节点，并自动生成曲面测量轨迹。在非接触检测平台上进行测试，对测量数据进行平滑处理，拟合出测量获得的非球面面形，完成面形精度和表面粗糙度的评价。实验结果表明，该可视化系统技术路线正确高效、稳定性好，为非球面检测数据及其综合分析仿真提供直观的可视化平台。

Surface profile measurement visualization of large aspheric lenses

A surface profile measurement visualization method of large aspheric lenses based on doubly-connected edge list (DCEL) are proposed, and a software system is designed and developed to realize it. Firstly, an improved data structure based on DCEL is proposed to load 3D model. The graphics units which compose the basic part of the software are modeled based on DCEL data structure. Secondly, the scene node which composes the display part of software is created by aspheric surface profile according to surface equation. And the measurement path is generated and displayed by the software. An experiment was performed on the noncontact measurement platform. The data were integrated and smoothed to compare with the equation of aspheric surface contour and then the peak-valley value and RMS value of the surface were calculated. The experiment indicates that the surface profile measurement visualization method is correct and stable.