Polarization imaging with enhanced spatial resolution

Peinado, Alba; Lizana, Ángel; Iemmi, Claudio; Campos, Juan

doi:10.1016/j.optcom.2014.09.079

Cited by 6 publications

(2 citation statements)

References 37 publications

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“…In this section, we present an experimental set-up based on LC technology able to provide polarization images with enhanced spatial resolution (SR) [18], when the main limitation in resolution is imposed by the pixel pitch of the CCD camera.…”

Section: A Super-resolution Imaging Polarimetermentioning

confidence: 99%

Design of polarimeters based on liquid crystals and biaxial crystals for polarization metrology

Peinado¹,

Lizana²,

Campos³

2016

Opt. Pura Apl.

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ABSTRACT:This paper reviews three polarimeters based on different types of liquid crystal cells (parallel and twisted nematic, and ferroelectric), as well as a polarimeter based on the conical refraction phenomenon (occurring in biaxial crystals). A comparative analysis between them is included in order to summarize their main features and to point out their strengths and limitations. Then, the best candidate for imaging polarimetry is selected and implemented. Several polarization images are analyzed in order to show the potential of the instrument. Moreover, a new experimental configuration is presented, which combines an imaging polarimeter and a module used to achieve sub-pixelresolution in a system where the resolution is limited by detector pixel size. Experimental results show an improvement in the spatial resolution of polarization images by a factor of 1.4.Key words: polarimetry, liquid crystals, conical refraction, image polarimeter, super-resolution. RESUMEN:Este artículo revisa tres polarímetros basados en diferentes tipos de láminas de cristales líquidos (nemático con estructura paralela y helicoidal, y ferroeléctrico), así como un polarímetro basado en el fenómeno de la refracción cónica (que ocurre en cristales biaxiales). Se incluye un análisis comparativo entre ellos resumiendo sus principales características y señalando sus puntos fuertes y limitaciones. A continuación, se selecciona el mejor candidato para la polarimetría de imagen y es implementado. Se analizan varias imágenes de polarización con el fin de mostrar el potencial del instrumento. Además, se presenta una configuración experimental nueva, que combina un polarímetro de imagen y un módulo utilizado para lograr resolución sub-píxel en un sistema en el que la resolución está limitada por el tamaño del píxel del detector. Los resultados experimentales muestran una mejora en la resolución espacial de las imágenes de polarización en un factor de 1.4.Palabras clave: polarimetría, cristales líquidos, refracción cónica, polarímetro de imagen, superresolución. REFERENCES AND LINKS

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Section: A Super-resolution Imaging Polarimetermentioning

confidence: 99%

Design of polarimeters based on liquid crystals and biaxial crystals for polarization metrology

Peinado¹,

Lizana²,

Campos³

2016

Opt. Pura Apl.

Self Cite

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“…To capture the multiple images required to image polarisation states there have been many different designs of cameras. Since multiple measurements are required they can be broken down in two major types: temporal multiplexing cameras (or division of time) [17][18][19] and spatially multiplexing (or division of wavefront) [9,20]. The temporal multiplex devices typically have a single camera sensor and record N images with a different polarisation modulation imposed on each.…”

Section: Introductionmentioning

confidence: 99%

Multiple-view polarimetric camera

2018

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A multiple-view polarimetric camera is developed. The system uses four separate action cameras, and software is employed to map the images onto each other in order to generate the Stokes vectors, the degree of linear polarization, and the angle images. To ensure robustness, an automated calibration system has been developed that ensures the pixels are correctly mapped. Video frame synchronization is also developed.

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Research on active polarization imaging experiments and key technologies in smoke and dust environment

Xie

Liu

et al. 2019

Optik

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Polarization imaging with enhanced spatial resolution

Cited by 6 publications

References 37 publications

Design of polarimeters based on liquid crystals and biaxial crystals for polarization metrology

Design of polarimeters based on liquid crystals and biaxial crystals for polarization metrology

Multiple-view polarimetric camera

Research on active polarization imaging experiments and key technologies in smoke and dust environment

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