Laura Maria Bilgeri

Wavefront Generator for Electronic Speckle-Pattern Interferometers


Front	Back

ISBN:

978-3-8440-6645-6

Series:

Reports on Measurement and Sensor Systems
Herausgeber: Prof. Dr.-Ing. Alexander W. Koch
München

Keywords:

Speckle-Interferometry; Surface Analysis; Shape Measurement; Adaptive Optics; Wavefront; Diffraction; Spatial Light Modulator

Type of publication:

Thesis

Language:

English

Pages:

172 pages

Figures:

70 figures

Weight:

255 g

Format:

21 x 14,8 cm

Bindung:

Paperback

Price:

48,80 € / 61,10 SFr

Published:

April 2019

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DOI:

10.2370/9783844066456 (Online document)

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Abstract

A common method to measure the shape of optically rough surfaces is the Electronic Speckle-Pattern Interferometry (ESPI). In ESPI, the shape is reconstructed by means of characteristic fringe patterns which are similar to a contour map. In the event that the combination of the surface shape and the measuring wavelengths results in either too high or too low local fringe densities, ESPI is at its limits. By using wavefront generators, the fringe density of the fringe pattern can be manipulated locally. In the present study, the physical limits and the feasibility of this method are analyzed theoretically and experimentally.