In:
Journal of Physics: Conference Series, IOP Publishing, Vol. 582, No. 1 ( 2015-01-14), p. 012033-
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
1742-6588
,
1742-6596
DOI:
10.1088/1742-6596/582/1/012033
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2015
detail.hit.zdb_id:
2166409-2
Bookmarklink