7th International Congress of Engineering Physics | |
Obtaining the wavefront phase maps of free form surfaces: using the least squares algorithm | |
物理学;工业技术 | |
Villalobos-Mendoza, B.^1 ; Aguirre-Aguirre, D.^1 ; Granados-Agustín, F.^1 ; Cornejo-Rodríguez, A.^1 | |
Instituto Nacional de Astrofisica, Óptica y Electrónica, Luis Enrique Erro No.1, Sta., María Tonantzintla, C.P., Puebla | |
72840, Mexico^1 | |
关键词: Conventional algorithms; Free-form surface; Interferograms; Least squares algorithm; Phase-shifting; Spatial light modulators; Twyman-Green interferometers; Wave-front phase; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/582/1/012033/pdf DOI : 10.1088/1742-6596/582/1/012033 |
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学科分类:工业工程学 | |
来源: IOP | |
【 摘 要 】
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.
【 预 览 】
Files | Size | Format | View |
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Obtaining the wavefront phase maps of free form surfaces: using the least squares algorithm | 831KB | download |