Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 10, 2015
|
|
---|---|---|
Article Number | 15010 | |
Number of page(s) | 5 | |
DOI | https://doi.org/10.2971/jeos.2015.15010 | |
Published online | 22 February 2015 |
Regular paper
Point diffraction interferometry to measure local curvatures and caustics of noisy wave fronts: Application for determining optical properties of fish lenses
1
Departament de Física Aplicada i Òptica, Facultat de Física, Universidad de Barcelona, 08028 Barcelona, Spain
2
Departamento de Física, Facultad de Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
a santi.vallmitjana@ub.edu
b Isaac.ricart.bou@gmail.com
c sbosch@ub.edu
d ana.gargallo@usc.es
e eva.acosta@usc.es
Received:
19
November
2014
Revised:
3
February
2015
The study of caustics is important because they contain information about the image formation properties of optical systems. In this work we use the concept of caustic as a set of focal points, and we have developed a second order approach theory to determine local slopes and curvatures of a wavefront emerging from an optical system. The method is based on the use of a point diffraction interferometer, and the analysis of the interferograms allows us to compute the focal region. Experimental results obtained with a plano-convex lens demonstrate the accuracy of the combined theoretical-experimental method here developed. Application to noisy wavefronts such as those produced by biological samples, specifically in crystalline lenses of fish eyes, are also exposed.
Key words: Caustics / wavefront curvatures / point difraction interferometry / noisy wavefronts / fish lenses
© The Author(s) 2015. All rights reserved.
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