LCOS Spatial Light Modulators: Trends and Applications

Lazarev, Grigory; Hermerschmidt, Andreas; Krüger, Sven; Osten, Stefan

doi:10.1002/9783527648443.ch1

Cited by 112 publications

(87 citation statements)

References 76 publications

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“…This is generally true in digital backplane devices due to the pulsed digital signal addressed [10,11,15,16]. Typical methods used to characterize linear variable retarders may provide erroneous results [17,18] since they typically assume that the birefringence in the waveplate has a constant value, no fluctuations, during the measurement process.…”

Section: Introductionmentioning

confidence: 99%

Averaged Stokes polarimetry applied to evaluate retardance and flicker in PA-LCoS devices

et al. 2014

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Abstract:Recently we proposed a novel polarimetric method, based on Stokes polarimetry, enabling the characterization of the linear retardance and its flicker amplitude in electro-optic devices behaving as variable linear retarders. In this work we apply extensively the technique to parallelaligned liquid crystal on silicon devices (PA-LCoS) under the most typical working conditions. As a previous step we provide some experimental analysis to delimitate the robustness of the technique dealing with its repeatability and its reproducibility. Then we analyze the dependencies of retardance and flicker for different digital sequence formats and for a wide variety of working geometries.

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Section: Introductionmentioning

confidence: 99%

Averaged Stokes polarimetry applied to evaluate retardance and flicker in PA-LCoS devices

et al. 2014

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“…Son dispositivos pixelados, normalmente de matriz rectangular, de unos pocos centímetros, y el número pixeles es del orden de 1000 x 1000. Estos dispositivos pueden actuar en transmisión o en reflexión,está última siendo la situación más común en los dispositivos más modernos [2]. El desarrollo tecnológico de estos dispositivos ha permitido una simplificación de su uso [3], en donde actualmente se controlan a través de una computadora como si fuese un segundo monitor.Los SLM se utilizan hoy en día en diversas áreas de la óptica, como proyección de video e imagen, sistemas de pinzas ópticas, holografía y almacenamiento de datos [4].…”

Section: Introductionunclassified

Desarrollo de un sistema basado en un LCOS-SLM para la generación de espectros sintonizables

Henríquez¹

2017

DOCTUMH

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Cómo citar este trabajo How to cite this paperA. Cofré Hernríqez, "Desarrollo de un sistema basado en un LCOS-SLM para la generación de espectros sintonizables" Revista Doctorado UMH, vol. 2, no 2, p.2, 2016. [Online].Desarrollo de un sistema basado en un LCOS-SLM para la generación de espectros sintonizablesDevelopment based on a LCoS-SLM for generatingtunable spectra system RESUMENEmpleando un modulador espacial de luz de cristal líquido sobre silicio (LCoS-SLM) como un retardador pixelado programable, se ha logrado desarrollar un sistema óptico que permite controlar el espectro de una fuente de luz láser de supercontínuo. El haz polarizado pasa por una red de difracción que descompone sus componentes espectrales, que se proyectansobre el LCoS-SLM, al cual aplicamos desde un ordenador diferentes máscaras de nivel de gris, logrando modificar la fase de cada longitud de onda. Al recombinarse el haz completo y atravesar por un analizador permite el paso de la intensidad de la luz de cada longitud de onda de acuerdo a la nueva fase que ésta adquirió en el modulador. Para la creación de las máscaras se analizaron tres métodos, el primero basado en un ajuste de Cauchy, el segundo en una interpolación de los valores obtenidos por un muestreo rápido y la última propuesta en la creación de una tabla con todos los valores.Finalmente presentamos los diferentes resultados que se obtuvieron como la elección de ciertas longitudes de onda y la creación de un filtro paso banda variable.Palabras clave: Dispositivo cristal líquido, modulador, espectro, polarización. ABSTRACTWe used a liquid crystal on silicon spatial light modulator (LCoS-SLM) as a programmable pixelated retarder. We have developed an optical system that allows to control the spectrum of a supercontinuum laser light source. The polarized beam passes through a diffraction grating which splits the spectral components. Then is projected onto the LCoS-SLM where we apply from a computer different masks gray level, in order to modify the phase of each wavelength.After recombination and passage through an analyzer,the different wavelengths pass or not according to the new phase acquired in the modulator. Three methods were analyzed for creating masks, the first based on aCauchy relation fit, the second in an interpolation of the values obtained by rapid sampling and the latest proposal on creating a table with all values. Finally, we present the different results obtained as the choice of certain wavelengths and creating a variable pass band filter.

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“…State-of-the-art 3D holographic display technologies rely on spatial light modulators (SLMs) ranging from optically addressed, mirror based, to liquid crystal (LC) on silicon (LCoS) devices [4]. To date, LCoS pixel elements in SLMs provide the closest realization to true 3D holography owing to their phase modulation capabilities, performance and scalability [3].…”

Section: Introductionmentioning

confidence: 99%

Engineered pixels using active plasmonic holograms with liquid crystals

Williams

Montelongo

Tenorio-Pearl

et al. 2015

Phys. Status Solidi RRL

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Digital holography requires arrays of small reconfigurable elements to achieve complex reconstruction of the hologram with common systems based on pixels utilizing liquid crystal on silicon (LCoS) technology. The backplane of a typical pixel element is potentially underutilized and thus relatively large physical areas exist in which information can be stored and exploited to give additional functionality to pixel elements. Polarisation and wavelength dependent optical properties can be achieved in small areas using the plasmonic effects of optical antennae. The integration of LCs with optical antennae‐based plasmonic holograms allows active modulation of the far field pattern. The work here demonstrates the concept that conventional LCoS pixel elements can be greatly enhanced with the integration of plasmonic holograms, composed of optical antennae patterned on the surface, giving rise to new levels of modulation capability for holographic pixel elements. Using LCs, polarisation dependent effects in plasmonic holograms can be switched. ‘Engineered pixels', with sub‐wavelength multiplexing over both polarisation and wavelength, can increase the channel capacity of a typical LC display device. (© 2015 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

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LCOS Spatial Light Modulators: Trends and Applications

Cited by 112 publications

References 76 publications

Averaged Stokes polarimetry applied to evaluate retardance and flicker in PA-LCoS devices

Averaged Stokes polarimetry applied to evaluate retardance and flicker in PA-LCoS devices

Desarrollo de un sistema basado en un LCOS-SLM para la generación de espectros sintonizables

Engineered pixels using active plasmonic holograms with liquid crystals

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