Optimized Mueller polarimeter with liquid crystals

Mueller polarimetry is used to investigate the behavior of an electro optic target (BSO crystal) under exposure of guided ionization waves produced by an atmospheric pressure plasma jet. For the first time, this optical technique is time resolved to obtain the complete Mueller matrix of the sample right before and after the impact of the discharges. By analyzing the induced birefringence, the spatial profiles and local values are obtained of both the electric field and temperature in the sample. Electric fields are generated due to deposited surface charges and a temperature profile is present, due to the heat transferred by the plasma jet. The study of electric field dynamics and local temperature increase at the target, due to the plasma jet is important for biomedical applications, as well as surface functionalization. This work shows how Mueller polarimetry can be used as a novel diagnostic to simultaneously acquire the spatial distribution and local values of both the electric field and temperature, by coupling the external source of anisotropy to the measured induced birefringence via the symmetry point group of the examined material.

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“…The induced anisotropy terms ∆η are assumed to be small enough to allow a Taylor expansion, see equations (7) and (8).…”

Section: Externally Induced Birefringencementioning

confidence: 99%

Electric field and temperature in a target induced by a plasma jet imaged using Mueller polarimetry

Slikboer

Sobota

Guaitella

et al. 2017

J. Phys. D: Appl. Phys.

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“…It can be proved that in the M-S formalism, the SOP of the light beam exiting from the LP1 + (PA) LCD optical system is described by the following Stokes vector: (13) where θ is the orientation of the LCD and φ its retardance.…”

Section: Experimental Implementation Of a Stokes Polarimeter Based Onmentioning

confidence: 99%

“…Moreover, the retardance values of the LC can be properly chosen in order to optimize its performance as a function of the specific wavelength used. As an example, in Ref [13]. the optimization of a polarimeter based in two LC variable retarders and a polarizer is described.…”

Section: Introductionmentioning

confidence: 99%

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Optimization and performance criteria of a Stokes polarimeter based on two variable retarders

Peinado¹,

Lizana²,

Vidal³

et al. 2010

Opt. Express

109

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Abstract:In this paper we present the analysis, optimization and implementation of several Stokes polarimeter configurations based on a setup including two variable retarders. The polarimeter analysis is based on the Mueller-Stokes formalism, and as a consequence, it is suitable to deal with depolarized light. Complete Stokes polarimeters are optimized by minimizing the amplification of simulated errors into the final solution. Different indicators useful to achieve this aim, as the condition number or the equally weighted variance, are compared in this paper. Moreover, some of the optimized polarimeters are experimentally implemented and it is studied the influence of small deviations from the theoretical ones on the amplification of the Stokes component error. In addition, the benefit of using incomplete polarimeters, when detecting specific ranges of states of polarization, is discussed.

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“…The dual rotating compensator setup is one of the most popular approaches to measure the complete Mueller matrix, but there several other alternatives discussed in Refs. [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Conversion of a polarization microscope into a Mueller matrix microscope. Application to the measurement of textile fibers

Kuntman¹,

Arteaga²,

Roca³

et al. 2015

Opt. Pura Apl.

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Conversión de un microscopio de polarización en un microscopio de matriz de Mueller. Aplicación a la medida de fibras textiles. ABSTRACT:This work reports the conversion of a commercial polarization microscope (Zeiss Jenaval) into an automatized Mueller matrix microscope. A Mueller matrix measurement provides the value of all the optical properties of a specimen (linear dichroism, linear birefringence, circular dichroism etc.) at a specific wavelength. In contrast to traditional polarization microscopes, which use white light and crossed polarizers to generate colored interference patterns that are analyzed by the microscope user and give only semi-quantitative results, here we demonstrate that it is possible to convert a polarization microscope into a Mueller microscope by only adding two motorized rotating compensators into the optical path without altering the optics or other opto-mechanical elements of the microscope. To our knowledge this is the most compact, fast and handy Mueller microscope ever developed. The performance of this new Mueller matrix microscope is illustrated with some birefringence measurements on textile fibers.Key words: microscopy, polarimetry, Mueller matrix, birefringence. RESUMEN:Este trabajo describe la conversión de un microscopio de polarización comercial (Zeiss Jenaval) en un microscopio de matriz de Mueller automatizado. Una medida de la matriz de Mueller proporciona todas las propiedades ópticas de una muestra (dicroísmo lineal, birrefringencia lineal, dicroísmo circular, etc) para una longitud de onda dada. Los microscopios de polarización tradicionales usan luz blanca y polarizadores cruzados para generar un patrón de colores interferencia que debe ser interpretado por el usuario del microscopio y proporciona resultados sólo semi-cuantitativos. En este trabajo demostramos que añadiendo dos compensadores rotatorios actuados por sendos motores es posible convertir un microscopio de polarización en un microscopio de matriz de Mueller sin alterar la óptica u otros elementos opto-mecánicos del microscopio. Creemos que este es el microscopio de matriz de Mueller más compacto, rápido y práctico que se ha desarrollado. El funcionamiento de este microscopio se demuestra con algunas medidas de birrefringencia en fibras textiles.Palabras clave: microscopía, polarimetría, matriz de Mueller, birrefringencia.

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Optimized Mueller polarimeter with liquid crystals

Cited by 230 publications

References 15 publications

Electric field and temperature in a target induced by a plasma jet imaged using Mueller polarimetry

Electric field and temperature in a target induced by a plasma jet imaged using Mueller polarimetry

Optimization and performance criteria of a Stokes polarimeter based on two variable retarders

Conversion of a polarization microscope into a Mueller matrix microscope. Application to the measurement of textile fibers

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