10 February 2021 Absolute phase correction for phase-measuring profilometry based on color-coded fringes
Lei Cui, Guoying Feng, Hongru Li, Han Yuan, Zhongyi Bao
Author Affiliations +
Abstract

A phase correction method that utilizes fringe color-coding in phase-measuring profilometry is proposed. Original and additional fringes are encoded into the R and B channels, respectively. The R + B channel patterns are projected onto an object, captured using a camera, where the R and B channels are extracted. Then, phase shifts obtained from the R and B channels are utilized for absolute phase calculation and correction. Simulations and experiments demonstrate that this method can correct edge order errors and avoid increasing the fringe number. Experiments performed using the R + G, G + B, and R + B channels demonstrate that R + B exhibits the least color crosstalk.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2021/$28.00 © 2021 SPIE
Lei Cui, Guoying Feng, Hongru Li, Han Yuan, and Zhongyi Bao "Absolute phase correction for phase-measuring profilometry based on color-coded fringes," Optical Engineering 60(2), 024101 (10 February 2021). https://doi.org/10.1117/1.OE.60.2.024101
Received: 12 August 2020; Accepted: 15 January 2021; Published: 10 February 2021
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CITATIONS
Cited by 2 scholarly publications.
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KEYWORDS
Cameras

Oxygen

Projection systems

Phase shifts

Optical engineering

3D metrology

Phase shift keying

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