A multiple three-step phase shifting profilometry for nonlinearity error reduction

  • Mary Nathalie Gloria Dela Cruz National Institute of Physics, University of the Philippines Diliman
  • Jayson Puti Cabanilla National Institute of Physics, University of the Philippines Diliman
  • Nathaniel Hermosa National Institute of Physics, University of the Philippines Diliman

Abstract

We propose a method to reduce the phase errors due to intensity nonlinearity inherent to the traditional three-step phase shifting profilometry. In this method, multiple three-step phase shifting patterns with varying initial phase offsets were acquired. The height maps extracted from the multiple wrapped phase maps were averaged to get a more precise 3D profile of the object. We were able to reduce the ripples evident in the reconstruction of the conventional three-step phase shifting profilometry as we increased the number of sets of three-step phase shifting patterns to a certain value.

Published
2019-05-22
How to Cite
[1]
M. N. Dela Cruz, J. Cabanilla, and N. Hermosa. A multiple three-step phase shifting profilometry for nonlinearity error reduction, Proceedings of the Samahang Pisika ng Pilipinas 37, SPP-2019-PA-43 (2019). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2019-PA-43.