Su Wei-Hung, Hsu Chun-Hsiang, Su Wei-Chia, Liu Jung-Ping
Department of Material Science and Optoelectronic Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
Opt Express. 2011 Feb 14;19(4):3272-83. doi: 10.1364/OE.19.003272.
An approach using a liquid-crystal spatial light modulator (LC-SLM) to enlarge the depth measuring range of the projected fringe profilometry is presented. This approach is especially applicable to detect dynamic objects with micro-scale sizes. Compared with a typical 2D image system, the LC-SLM provides a better performance for a 3D shape sensing system. The main advantages include (1) a much higher allowance to increase in the depth measuring range, (2) easiness to compensate perspective distortion and geometric distortion, (3) very high accuracy (in the micron-range) and (4) only one phase measurement needed for operation.
提出了一种使用液晶空间光调制器（LC-SLM）来扩大投影条纹轮廓术深度测量范围的方法。该方法特别适用于检测具有微尺度尺寸的动态物体。与典型的二维图像系统相比，LC-SLM为三维形状传感系统提供了更好的性能。主要优点包括：（1）深度测量范围增加的余量更高；（2）易于补偿透视畸变和几何畸变；（3）非常高的精度（在微米范围内）；（4）操作仅需一次相位测量。
