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For the absolute and shade-free shape measurement of 3D objects with large height discontinuities, a co-axial optical sensor system with a common image plane for pattern projection and observation was proposed. Experimental results are presented that demonstrate the shape measurements of objects with a deep hole and large discontinuities.
Mitsuo Takeda,Takahiro Aoki,Yoko Miyamoto,Hideyuki Tanaka,Ruowei Gu, andZhibo Zhang
"3D shape measurement using a coaxial and coimage-plane fringe projection and observation system", Proc. SPIE 3744, Interferometry '99: Techniques and Technologies, (13 August 1999); https://doi.org/10.1117/12.357703
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