Profile measurement using projection of running fringes.

@article{Indebetouw1978ProfileMU,
  title={Profile measurement using projection of running fringes.},
  author={G. Indebetouw},
  journal={Applied optics},
  year={1978},
  volume={17 18},
  pages={
          2930-3
        }
}
A method of profile control or measurement using projected fringes is presented. The fringes are dynamically translated over the object, and the phase of the signal picked up at a selected point on the surface is used to determine the depth or the depth error of the profile at this point. The method has the advantage of being contact-free, fast, accurate, and easily automated. 
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