Proceedings ArticleDOI
Optical moire leveraging analysis
Kevin G. Harding
- Vol. 2348, pp 181-188
TLDR
The effect of optical moire as created by the interference of two grating patterns is a proven means to extend the range of some structured light contouring methods as has been used for years on glass scale encoders, the moire effect allows small displacements to be measured from lines well below the resolution limit of the camera system used to view the patterns as discussed by the authors.Abstract:
The effect of optical moire as created by the interference of two grating patterns, is a proven means to extend the range of some structured light contouring methods As has been used for years on glass scale encoders, the moire effect allows small displacements to be measured from lines well below the resolution limit of the camera system used to view the patterns This paper will present an overview of how this effect can be used effectively This analysis will include formulation of means to quantify the optical leverage effect of the moire for 3D contouring applications, and a quantitative comparison of resolution limits for moire versus straight structured light The benefits and limitations of optical moire leveraging will be discussed for good and bad applications of the technique Finally, the optical methods that can be employed to improve the images of moire patterns will be presentedread more
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