In this work is presented the validation of the least squares algorithm proposed by Morgan (1982) and Greivenkamp (1984), to obtain the wavefront phase maps of a free form surface. The validation was made by simulating the synthetic interferograms of a free form surface using a Bessel function, each interferogram was simulated with a phase-shifting of π/20. This algorithm is applied to the experimental interferograms that are obtained in a Twyman-Green interferometer where the phase shifting is achieved by using a SLM (Spatial Light Modulator) that is placed in one of its arms; the phase shifts are achieved by displaying all the gray levels from 0 to 255 in the SLM. The phase shifts that are performed in this experimental setup are lower than π/4, therefore the conventional algorithms cannot be applied.
|Title of host publication||Journal of Physics: Conference Series|
|Publication status||Published - 14 Jan 2015|
|Name||Journal of Physics: Conference Series|
|Publisher||IOP Publishing Ltd.|
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© Published under licence by IOP Publishing Ltd.
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)