Repeatable speckle projector for single-camera three-dimensional measurement

被引：11
作者：
Stark, Andreas [1 ,2 ]
Wong, Eugene [1 ,2 ]
Weigel, Daniel [1 ,2 ]
Babovsky, Holger [1 ,2 ]
Kowarschik, Richard [1 ,2 ]
机构：
[1] Friedrich Schiller Univ Jena, Inst Appl Opt, Jena, Germany
[2] Abbe Ctr Photon, Jena, Germany
来源：
OPTICAL ENGINEERING | 2018年 / 57卷 / 12期
关键词：
speckles; three-dimensional measurement; projector calibration; metrology; CALIBRATION; ACCURATE; DOCUMENTATION; FIELD;
D O I：
10.1117/1.OE.57.12.120501
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Triangulation-based three-dimensional (3-D) optical metrology utilizing structured illumination requires the projector and camera to be geometrically calibrated. The projection of laser speckle structures in temporal correlation-based methods has been found to be useful for high-speed 3-D measurement. However, it requires the use of a stereo-camera configuration as speckle projection does not utilize conventional projection optics. Previously, we have shown a model-less method to calibrate these unconventional projection systems. This re-enabled single-camera setups where stereo systems used to be required. Due to the random nature of speckle production, speckle structures were not suitable as a set of repeatable illumination structures is needed for the model-less calibration method to succeed. A projection apparatus is proposed, which enables the production of a repeatable set of speckle structures. This device is then utilized in a single-camera optical metrology 3-D measurement system. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：4
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