Flexible calibration method for microscopic structured light system using telecentric lens.

This research presents a novel method to calibrate a microscopic structured light system using a camera with a telecentric lens. The pin-hole projector calibration follows the standard pin-hole camera calibration procedures. With the calibrated projector, the 3D coordinates of those feature points used for projector calibration are then estimated through iterative Levenberg-Marquardt optimization. Those 3D feature points are further used to calibrate the camera with a telecentric lens. We will describe the mathematical model of a telecentric lens, and demonstrate that the proposed calibration framework can achieve very high accuracy: approximately 10 μm with a volume of approximately 10(H) mm × 8(W) mm × 5(D) mm.

[1]  Dong Li,et al.  An accurate calibration method for a camera with telecentric lenses , 2013 .

[2]  Peisen S. Huang,et al.  Novel method for structured light system calibration , 2006 .

[3]  Hongjian Shi,et al.  Accurate 3D measurement system and calibration for speckle projection method , 2010 .

[4]  Chenggen Quan,et al.  Shape measurement of small objects using LCD fringe projection with phase shifting , 2001 .

[5]  Dalip Singh Mehta,et al.  Liquid-crystal phase-shifting lateral shearing interferometer with improved fringe contrast for 3D surface profilometry. , 2013, Applied optics.

[6]  Meng Wang,et al.  Fringe projection 3D microscopy with the general imaging model. , 2015, Optics express.

[7]  Qinping Zhao,et al.  Fringe projection based quantitative 3D microscopy , 2013 .

[8]  Chenggen Quan,et al.  Microscopic surface contouring by fringe projection method , 2002 .

[9]  Dong Li,et al.  Telecentric 3D profilometry based on phase-shifting fringe projection. , 2014, Optics express.

[10]  Hans J. Tiziani,et al.  Three-dimensional Topometry with Stereo Microscopes , 1997 .

[11]  Peisen Huang,et al.  Microscopic phase-shifting profilometry based on digital micromirror device technology. , 2002, Applied optics.

[12]  Tong Guo,et al.  Microscopic fringe projection system and measuring method , 2013, Other Conferences.

[13]  Klaus-Peter Proll,et al.  Microscopic three-dimensional topometry with ferroelectric liquid-crystal-on-silicon displays. , 2003, Applied optics.

[14]  Katia Genovese,et al.  Vibration analysis at microscale by Talbot fringe projection method , 2009 .

[15]  Sai Siva Gorthi,et al.  Fringe projection techniques: Whither we are? , 2010 .