A method of linearly coded profilometry is proposed. It uses
linear-structure light with isosceles triangle teeth to code the object
being measured and a phase-shifting technique to decode the
profile. For reducing the effect of noise more than three equally
spaced samples are used, and, according to the least-squares method,
the general formulas of the decoded phase are given. The
experimental results of a model of a head are shown.
© 1999 Optical Society of America
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