3D shape measurement of a ground surface optical element using band-pass random patterns projection  

作　　者：刘昆 周常河 王少卿 韦盛斌 范鑫 

机构地区：[1]Laboratory of Information Optics and Optoelectronics Techniques, Shanghai Institute of Optics and Fine Mechanics,University of Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2015年第8期37-39,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61127013,61308073,and 61307064);the Foundation of the State Administration of Culture Heritage(No.20120228)

摘　　要：For manufacturing a fine optical glass lens, it is important to obtain a 3D profile of a senti-finished product with a rough surface. We develop an active binocular 3D scanning setup to measure the 3D profile of a rough surface optical element. Two cameras simultaneously capture the band-pass binary random patterns which are projected on the target object. The highlight of this system is using the temporal correlation technique to determine the stereo correspondence between the pixels of the two cameras. The 3D point cloud can be reconstructed by the triangulation principle. Experiment results confirmed that this method effectively measures the rough surface of an optical element with sufficient accuracy.For manufacturing a fine optical glass lens, it is important to obtain a 3D profile of a senti-finished product with a rough surface. We develop an active binocular 3D scanning setup to measure the 3D profile of a rough surface optical element. Two cameras simultaneously capture the band-pass binary random patterns which are projected on the target object. The highlight of this system is using the temporal correlation technique to determine the stereo correspondence between the pixels of the two cameras. The 3D point cloud can be reconstructed by the triangulation principle. Experiment results confirmed that this method effectively measures the rough surface of an optical element with sufficient accuracy.

关 键 词：LENGTH TCT 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN948.41[自动化与计算机技术—计算机科学与技术]