1. Phase unwrapping method based on multiple fringe patterns without use of equivalent wavelengths
- Author
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Xinjun Zhu, Xiao-jie Li, Jiangtao Xi, Yu-lan Chang, Qinghua Guo, and Limei Song
- Subjects
Physics ,Series (mathematics) ,business.industry ,Absolute phase ,Noise enhancement ,Process (computing) ,Phase (waves) ,Phase unwrapping ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Wavelength ,Optics ,Profilometer ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,business - Abstract
In order to decrease the noise enhancement in the process of phase unwrapping, we present a new phase unwrapping approach for multiple wavelength phase shift profilometry. In this approach, a series of fringe images with only three wavelengths are captured by the 3D measurement system, and it does not need to calculate the equivalent wavelengths and the equivalent phases. As a result, the noise enhancement is avoided, leading to improved precision in the absolute phase map recovery. Experiment results demonstrate that the proposed method is more robust and effective compared to the existing TWPSP method.
- Published
- 2015
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