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Proceedings Paper

Active versus passive projector nonlinear gamma compensation method for high-quality fringe pattern generation
Author(s): Song Zhang
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Paper Abstract

This paper presents our comparing study on active and passive methods for compensating the phase error induced by the projector nonlinear gamma effect. The active method modifies the fringe patterns before their projection; and the passive method, in contrast, compensates for the phase error after capturing fringe patterns. Our study finds that the active method tends to provides more consistent high-quality fringe patterns regardless the amount of projector’s defocusing; yet the effectiveness of the passive method is sensitive to the measurement conditions, albeit the passive method could provide equally good quality phase under the optimal calibration condition. Experimental results will be presented to compare these two different methods.

Paper Details

Date Published: 28 May 2014
PDF: 10 pages
Proc. SPIE 9110, Dimensional Optical Metrology and Inspection for Practical Applications III, 911002 (28 May 2014); doi: 10.1117/12.2050534
Show Author Affiliations
Song Zhang, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 9110:
Dimensional Optical Metrology and Inspection for Practical Applications III
Kevin G. Harding; Toru Yoshizawa, Editor(s)

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