Landmann Martin, Speck Henri, Dietrich Patrick, Heist Stefan, Kühmstedt Peter, Tünnermann Andreas, Notni Gunther
Appl Opt. 2021 Mar 10;60(8):2362-2371. doi: 10.1364/AO.419492.
Three-dimensional (3D) shape measurement systems based on diffuse reflection of projected structured light do not deliver reliable data when measuring glossy, transparent, absorbent, or translucent objects. In recent years, we have developed a method based on stereo recording with infrared cameras and projection of areal aperiodic sinusoidal thermal patterns to detect such objects. However, the measurements took longer than 10 s, up to minutes; moreover, the measurement accuracy was improvable. Now, we have succeeded in both drastically reducing measurement time and significantly increasing measurement quality. This finally provides a technique for reliably measuring transparent objects, e.g., in series production. We demonstrate measurement examples achieved within 1 s and with 3D standard deviations less than 10 µm.
基于投射结构光的漫反射的三维（3D）形状测量系统在测量有光泽、透明、吸收性或半透明物体时无法提供可靠的数据。近年来，我们开发了一种基于红外摄像机立体记录和区域非周期性正弦热图案投影的方法来检测此类物体。然而，测量时间长达10秒以上，甚至几分钟；此外，测量精度还有提升空间。现在，我们成功地大幅缩短了测量时间并显著提高了测量质量。这最终提供了一种可靠测量透明物体的技术，例如在批量生产中。我们展示了在1秒内完成的测量示例，其三维标准偏差小于10微米。
