Uniaxial three-dimensional shape measurement with projector defocusing

Date
2012-03-09
Authors
Xu, Ying
Zhang, Song
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Mechanical Engineering
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Abstract

Our study shows that the phase error caused by improperly defocused binary structured patterns correlates to the depth z. This finding leads to a novel uniaxial three-dimensional shape measurement technique without triangulation. Since the measurement can be performed from the same viewing angle, this proposed method overcomes some limitations of the triangulation-based techniques, such as the problem of measuring deep holes. Our study explains the principle of the technique and presents some experimental results to verify its feasibility.

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This article is from Optical Engineering 51 (2012): 1, doi:10.1117/1.OE.51.2.023604. Posted with permission.

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