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Proceedings Paper

Wavefront sensing with varying transmission filters: past, present, and future
Author(s): François Hénault
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Paper Abstract

The use of Wavefront Sensors (WFS) is nowadays essential in the field of instrumental optics. In this communication, I present and discuss the principle of a new, recently proposed family of WFS. Their principle consists in evaluating the slopes of the Wavefront Errors (WFE) by means of varying density filters placed into the image plane of the tested optical system (the device is sometimes called "optical differentiation WFS"). The wavefronts are reconstructed from the obtained slopes digitally. Various luminous sources of different wavelengths, spectral widths and spatial sizes can be employed. The capacities of the method are discussed from the geometrical and Fourier optics points of view, then illustrated by a few numerical simulations showing some examples of practical applications. Two different measurement configurations are also schematically described and commented.

Paper Details

Date Published: 19 October 2005
PDF: 12 pages
Proc. SPIE 5965, Optical Fabrication, Testing, and Metrology II, 596513 (19 October 2005); doi: 10.1117/12.624780
Show Author Affiliations
François Hénault, CRAL Observatoire de Lyon (France)

Published in SPIE Proceedings Vol. 5965:
Optical Fabrication, Testing, and Metrology II
Angela Duparré; Roland Geyl; Lingli Wang, Editor(s)

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