Simple spectral technique to identify the ordinary and extraordinary axes of a liquid crystal retarder

Sánchez-López, Marı́a del Mar; Vargas, Asticio; Cofré, Aarón; Campos, Juan

doi:10.1016/j.optcom.2015.03.052

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…In each LCoS device, the incident ray and the reflected ray form an angle of around 11°. Although non-normal incidence affects the modulation provided by the display, such small angle of incidence produces only a very small variation [22,23]. Both LCoS displays are located in conjugated planes through a 4f system, composed of two lenses L 2 and L 3 , both with a focal length of f = 200 mm.…”

Section: Optical Systemmentioning

confidence: 99%

Dual polarization split lenses

et al. 2017

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We report the realization of polarization sensitive split lens configurations. While split lenses can be used to easily generate different types of controlled structured light patterns, their realization has been limited so far to scalar beams. Here we propose and experimentally demonstrate their generalization to vectorial split lenses, leading to light patterns with customized intensity and state of polarization. We demonstrate how these polarization split lenses can be experimentally implemented by means of an optical system using two liquid crystal spatial light modulators, each one phase modulating one orthogonal polarization component. As a result, we demonstrate the experimental generation of vectorial beams with different shapes generated with these dual polarization split lenses. Excellent experimental results are provided in each case. The proposed technique is a simple method to generate structured light beams with polarization diversity, with potential applications in polarimetry, customized illuminators or quantum optics.

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Section: Optical Systemmentioning

confidence: 99%

Dual polarization split lenses

et al. 2017

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“…However, characterization of their spectral retardance properties can be very valuable for several reasons: 1) the retarder can be used at wavelengths different to the original design; 2) the retarder can be applied to build spectral birefringent filters, which are based on the wavelength variation of the retardance [4], 3) it allows the simple identification of the ordinary and extraordinary neutral axes of the retarder [5], and 4) the retardance modulation of tunable LC retarders can be characterized [6,7].…”

Section: Introductionmentioning

confidence: 99%

Optical system for measuring the spectral retardance function in an extended range

Messaadi

Sánchez-López

García‐Martínez

et al. 2016

J. Eur. Opt. Soc.-Rapid Publ.

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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.

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Stokes Polarimetry Method for Measuring In-Plane Retardation and Out-of-Plane Retardation of Optical Wave

Kim

Lee

2020

IEEE Trans. Instrum. Meas.

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Simple spectral technique to identify the ordinary and extraordinary axes of a liquid crystal retarder

Cited by 5 publications

References 31 publications

Dual polarization split lenses

Dual polarization split lenses

Optical system for measuring the spectral retardance function in an extended range

Stokes Polarimetry Method for Measuring In-Plane Retardation and Out-of-Plane Retardation of Optical Wave

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