Speck Henri, Munkelt Christoph, Heist Stefan, Kühmstedt Peter, Notni Gunther
Opt Express. 2022 Oct 24;30(22):39534-39543. doi: 10.1364/OE.470564.
For three-dimensional (3D) measurement of object surface and shape by pattern projection systems, we used a hybrid projection system, i.e., a combination of a projection lens and a transmissive freeform to generate an aperiodic sinusoidal fringe pattern. Such a freeform effects a light redistribution, thus leading to an effective and low-loss pattern projection, as it increases the total transmission intensity of the system and has less power dissipation than classical projection systems. In this paper, we present the conception and realization of the measurement setup of a transmissive fringe projection system. We compare the characteristics of the generated intensity distribution with the classical system based on GOBO (GOes Before Optics) projection and show measurement results of different surface shapes, recorded with the new system.
对于通过图案投影系统进行物体表面和形状的三维（3D）测量，我们使用了一种混合投影系统，即投影透镜和透射式自由曲面的组合，以生成非周期性正弦条纹图案。这种自由曲面实现了光的重新分布，从而实现了有效且低损耗的图案投影，因为它增加了系统的总透射强度，并且比传统投影系统具有更低的功耗。在本文中，我们介绍了透射条纹投影系统测量装置的概念和实现。我们将生成的强度分布特性与基于GOBO（光学元件前的图案）投影的传统系统进行了比较，并展示了使用新系统记录的不同表面形状的测量结果。
