Virginia TechLally, Evan M.Gong, JianminWang, Anbo2014-04-042014-04-042010-03-01Evan Lally, Jianmin Gong, and Anbo Wang, "Method of multiple references for 3D imaging with Fourier transform interferometry," Opt. Express 18, 17591-17596 (2010). doi: 10.1364/OE.18.0175911094-4087http://hdl.handle.net/10919/46929This letter presents an improved phase referencing technique, called Method of Multiple References, for optical profilometry. Based on a lookup table, the method eliminates several major drawbacks of single-reference Fourier Transform Interferometry by enabling surface error correction for steep slopes and step discontinuities, and by allowing mapping of multiple discrete objects using a single image set. The algorithm is tested using a fiber optic coupler-based FTI system and shown to have RMS surface error less than 0.03mm. (C) 2010 Optical Society of Americaapplication/pdfen-USIn CopyrightPhase unwrapping algorithmProfilometryArticle - Refereedhttp://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-17-17591https://doi.org/10.1364/OE.18.017591