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Proceedings Paper

Centroid propagation through optical systems with ABCD kernels and non-uniform or finite apertures
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Paper Abstract

Determining the precise location of irradiance centroids is a key step for optical triangulation and wavefront sensing based on wavefront slope measurements (as e.g. in Hartmann-Shack aberrometry). Since most aberrometers include some kind of optical relay system to reimage the irradiance distributions provided by the wavefront sampling element onto the irradiance detector, it is esential to ensure that the centroid position and momentum information is preserved along this operation. In optical systems with ABCD difrraction kernels the centroids propagate according to an effective geometrical optics rule. However, the presence of finite apertures partially blocking the incoming beam or non-uniform transmittances unevenly altering its original irradiance distribution may give rise to potentially significant departures from this simple geometrical picture. The potential magnitude of this bias makes it advisable to take proper steps to counteract it in the design of aberrometric setups.

Paper Details

Date Published: 26 July 2011
PDF: 5 pages
Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 80012F (26 July 2011); doi: 10.1117/12.892096
Show Author Affiliations
Jesús Lancis, Univ. Jaume I (Spain)
Raúl Martínez-Cuenca, Univ. Jaume I (Spain)
Jorge Ares, Univ. de Zaragoza (Spain)
Salvador Bará, Univ. de Santiago de Compostela (Spain)


Published in SPIE Proceedings Vol. 8001:
International Conference on Applications of Optics and Photonics
Manuel Filipe Costa, Editor(s)

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