| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 12, Number 1, 2016
|
|
|---|---|---|
| Article Number | 21 | |
| Number of page(s) | 9 | |
| DOI | https://doi.org/10.1186/s41476-016-0023-7 | |
| Published online | 09 November 2016 | |
Research
Optical system for measuring the spectral retardance function in an extended range
1
Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica, Universidad Miguel Hernández, 03202, Elche, Spain
2
Departamento de Física y Arquitectura de Computadores, Instituto de Bioingeniería, Universidad Miguel Hernández, 03202, Elche, Spain
3
Departament d’Òptica, Universitat de València, 46100, Burjassot, Spain
4
Departamento de Ciencias Físicas, Universidad de La Frontera, Temuco, Chile
Received:
28
July
2016
Accepted:
24
October
2016
Background: Optical retarders are key elements for the control of the state of polarization of light, and their wavelength dependance is of great importance in a number of applications.
Methods: We apply a well-known technique for determinig the spectral retardance by measuring the transmission spectra between crossed or parallel polarizers. But we we develop an optical system to perform this measurement in a wide spectral range covering the visible (VIS) and near infrared (NIR) spectrum in the range from 400 to 1600 nm.
Results: As a result we can measure the spectral retardance of different retarders and easily identify the kind of reterder (multiple order, zero-order, achromatic). We show results with tunable liquid-crystal retarders as well, where the technique is applied to determine the spectral retardance as a function of the applied voltage. Finally, the accuracy of the technique is verified by the generation of a birefringent spectral filter.
Conclusions: A technique to measure the spectral retardance of a linear retarder in a wide spectral range is applied to identify different types of retarders, and provide an accurate description of the spectral polarization conversion properties of these elements.
Key words: Optical retarders / Liquid‐crystals / Spectroscopy / Filters
© The Author(s) 2016
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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