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Prof. Kristiaan Neyts visits TecnOpto-UMH


We were very pleased that Prof. Kristiaan Neyts, Head of the Liquid Crystals and Photonics Group from the Ghent University, accepted our invitation to come to Elche and impart a seminar on liquid crystals in the frame of the 3rd TECNIT PhD Workshop of our university, held in March 29th.

You can access to his seminar  LIQUID CRYSTALS: ROTATING MOLECULES FOR TUNABLE OPTICS here:


Martes, 11 de abril de 2017 Sin comentarios

Ignacio Moreno president of SEDOPTICA – the Spanish Society of Optics


SedopticaIgnacio Moreno became the President of SEDOPTICA – the Spanish Society of Optics. After three years as Vicepresident, he now becomes the President of the society for the period of the next three years.

SEDOPTICA joins researchers, academia and professionals of the area of Optics & Photonics in Spain.

During this period SEDOPTICA will reach its 50th anniversary in 2018.


Categories: International, Outreach Tags:

Martes, 4 de abril de 2017 Sin comentarios

New paper in Journal of Optics about Solc filters in a reflective geometry


JOpticsWe published a new paper in Journal of Optics entitled Solc filters in a reflective geometry. It presents the realization of  birefringent Solc type filter in a reflective geometry.

This geometry reduces by half the number of required retarders, ensures the same spectral retardance function in pairs of retarders. The key element is a quarter-wave Fresnel rhomb located in between the set of retarders and a mirror. We present two cases, one with multiple-order quartz retarders, and a second one that uses two liquid-crystal retarders, this last one being therefore tunable.

This is the second paper in the PhD Thesis of Abdelgahfour Messaaddi, and it has been done in collboration with our friend Asticio Vargas form Universidad de La Frontera , Temuco (Chile) and our friend Noureddine Bennis and his coworkers at the Military University of Technology, Warsaw (Poland).


Jueves, 16 de marzo de 2017 Sin comentarios

New publication in Applied Optics about the arithmetics of q-plates


ArithmeticsA new paper entitled Arithmetics with q-plates was published in Applied Optics where we show the capability to form various q-plate equivalent systems using combinations of commercially available q-plates. We show operations like changing the sign of the q-value, or the addition and subtraction of q -plates. These operations only require simple combinations of q-plates and half-wave plates.

This work was developed in collaboration with our friends at San Diego State University.


Categories: International, Publications, Research Tags:

Domingo, 22 de enero de 2017 Sin comentarios

New paper describing the Women in Light Sciences and Light Technologies Exhibition in RdF


rdfA new paper entitled Investigadoras en la luz y en las tecnologías de la luz (Women in Light Sciences and Light Technologies) has been published in the Revista Española de Física (Spanish Journal of Physics).

This paper describes the exhibition with the same name that was developed to commemorate the International Year of Light, describing the life and work of 12 women that made relevant contributions to the science of light.

This paper was written by Maria del Mar and Pascuala, in collaboration with Ana J. López-Díaz, from Universidade da Coruña, and Augusto Beléndez, from Universidad de Alicante.


Sábado, 17 de diciembre de 2016 Sin comentarios

New paper in Applied Optics about a new optical encryption technique


ao2017A new paper has been published in Applied Optics entitled New key based on tilted lenses for optical encryption, that describes a novel concept based on tilted spherical lenses for optical encryption using Lohmann’s type I systems. An experiment is presented, considering a hybrid encryption/decryption process where the image is numerically encrypted but optically decrypted.

This work was developed by our friends at the University of Valencia and we contributed by developing a experimental system that demonstrates the procedure.

 


Jueves, 15 de diciembre de 2016 Sin comentarios

New paper in European Journal of Physics about vortex beams with a TNLC-SLM


ejpWe published a new paper in European Journal of Physics entitled Vortex beam generation and other advanced optics experiments reproduced with a twisted-nematic liquid-crystal display with limited phase modulation.

In this work we propose the use of twisted-nematic liquid-crystal spatial light modulators (TN-LC-SLM) as a useful tool for training students in the manipulation of light beams with phase-only masks. In particular, we focus the work on the realization of phase-only gratings and phase-only spiral phases for the generation of vortex beams, beams carrying orbital angular momentum (OAM). We include different examples, including a optimal triplicator phase grating, and its combination with spiral phase patterns and lens functions to generate a variety of vortex beams.

The paper is included in a special section of the journal devoted to “Advanced Optics”, and it is the first publication from the PhD Thesis of Aarón Cofré.


Categories: Education, International, Publications Tags:

Miércoles, 14 de diciembre de 2016 Sin comentarios

Ignacio Moreno awarded as 2017 OSA Fellow


osa-fellowIgnacio Moreno has been awarded as a new 2017 OSA Fellow Member. This distinction was awarded to 96 OSA members for their significant contributions to the advancement of optics and photonics. The selection of these candidates was confirmed by the Board of Directors at its meeting in October 2016.

Ignacio Moreno has been recognized for his achievements on the control over amplitude, phase, polarization and wavelength with diffractive optical elements encoded onto liquid crystal displays.

The complete list of new awarded Fellows can be found at: link


Categories: International, Research Tags:

Viernes, 18 de noviembre de 2016 Sin comentarios

New paper in JEOS-Rapid Pub with an optical system to characterize retarders in a wide spectral range


jeosWe published a new paper in Journal of the European Optical Society – Rapid Publications, entitled Optical system for measuring the spectral retardance function in a extended range.

Here we apply a well-known technique for determining the spectral retardance of different linear retarders by measuring the transmission spectra between crossed or parallel polarizers. The system we developed allows measurements in a wide spectral range covering the visible (VIS) and near infrared (NIR) spectrum in the range from 400 to 1600 nm.

This work was made in collaboration with our friend Asticio Vargas from UFRO (Chile), and it is the first paper of the PhD thesis of Abdelghafor Messaadi.


Categories: International, Publications, Students Tags:

Lunes, 14 de noviembre de 2016 Sin comentarios

New paper in JJAP demonstrating the parallel generation of different vector beams


jjapWe published a new paper in Japanese Journal of Applied Physics entitled Parallel generation of multiple first-order vector beams with a polarization grating and a q-plate device.

In this work we demonstrated the parallel generation of multiple vector beams by combining a polarization diffraction grating with a q-plate element.

This work was made with our friends at San Diego State University (US), and in collaboration with our colleagues at the Development Division of Citizen Holdings Co (Japan).


Miércoles, 9 de noviembre de 2016 Sin comentarios