期刊
OPTICS EXPRESS
卷 28, 期 21, 页码 31197-31208出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.404260
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资金
- Beijing Innovation Center for Future Chip (ICFC)
- Directorate for Computer and Information Science and Engineering [IIS-1637961]
- National Science Foundation [IIS-1763689]
Three-dimensional (3D) shape measurement based on the fringe projection technique has been extensively used for scientific discoveries and industrial practices. Yet, one of the most challenging issues is its limited depth of field (DOF). This paper presents a method to drastically increase DOF of 3D shape measurement technique by employing the focal sweep method. The proposed method employs an electrically tunable lens (ETL) to rapidly sweep the focal plane during image integration and the post deconvolution algorithm to reconstruct focused images for 3D reconstruction. Experimental results demonstrated that our proposed method can achieve high-resolution and high-accuracy 3D shape measurement with greatly improved DOF in real time. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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