Phase error analysis of clipped waveforms in surface topography measurement using projected fringes
Peer reviewed, Journal article
Published version
Permanent lenke
https://hdl.handle.net/11250/2977674Utgivelsesdato
2020Metadata
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Originalversjon
10.1016/j.optcom.2020.126601Sammendrag
When working with the method of projected fringes outside the optical laboratory one often encounters the
problem of uncontrollable ambient light. This might cause saturation of the camera which in turn results
in clipping of the fringes. Since standard theories describing phase-shifting techniques assume the projected
fringes to be purely sinusoidal, such clipping will result in measurement error. In this paper a detailed analysis
of this problem is given, and relations between phase errors, the amount of fringe clipping and the number
of phase steps are found. Moreover, the phase difference between the clipped and the unclipped fringes is
described. This investigation is based on Fourier- and phasor analysis.