New electro-optic light valve device for image storage and processing

Grenot, M.; Pergrale, J.; Donjon, J.; Marie, G.

doi:10.1063/1.1654299

Cited by 23 publications

(6 citation statements)

References 5 publications

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“…In these photoconductor-electro optic medium sandwiches, the electro-optical medium can be a K. D*. P. crystal [3], a P. L. Z. T. ceramic [4], or a nematic liquid crystal used in its dynamic scattering mode [5,6]. Such photosensitive-electro-optic materials as bismuth silicate (Bi12Si020) [7,8] have recently led to very impressive displays.…”

Section: Classificationmentioning

confidence: 99%

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Analog electro-optical interface for spectral analysis

Labrunie¹

1975

Rev. Phys. Appl. (Paris)

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2014 Un relais électro-optique analogique a été mis au point ; il met en oeuvre l'effet de champ bien connu qui induit une modulation d'indice dans une couche mince homéotrope de cristal liquide nématique soumise à un champ électrique alternatif. Un tel dispositif peut présenter en temps réel 64 échantillons analogiques d'un signal électrique sur un montage d'optique cohérente en quelques millisecondes. Avec ce relais, des signaux électriques comme les électroencéphalogrammes, les vibrations de moteurs ou les signaux SONAR peuvent subir une analyse spectrale en temps réel par transformée de Fourier optique.Abstract. 2014 An analog electro-optical interface has been studied, which uses the well known field effect of index modulation in thin homeotropic layers of nematic liquid crystal, achieved under a. c. electric field. Such a device is able to present in real-time 64 analog samples of an electric signal in a few milliseconds on a coherent optical set. By means of this interface, electric signals such as electro encephalograms, engine vibrations or SONAR signals can be spectrally analyzed in real-time by optical Fourier transform.

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Section: Classificationmentioning

confidence: 99%

“…An important feature of optical spectrum analyzers is that they can be designed to perform the spectral analysis simultaneously for many channels in parallel [9]. 3. Performing a spectral analysis with the interface.…”

Section: Classificationmentioning

confidence: 99%

Analog electro-optical interface for spectral analysis

Labrunie¹

1975

Rev. Phys. Appl. (Paris)

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“…Electro-optic (EO) devices, especially those that can convert an incoherent image into a coherent one in a real time scale, play a significant role in optical image processing systems, optical parallel-logic systems, optical network application systems and holography and its applications [1]. Coherent optical converters using the Pockels effect for modulation of a homogeneous light flux are known [2][3][4][5]. Such devices are the multilayer structures with EO material in which a photoconductor is used to control the electric field in the bulk of EO medium.…”

Section: Introductionmentioning

confidence: 99%

Incoherent-to-coherent IR image converter on the basis of GaAs and Bi₁₂SiO₂₀crystals

Salamov

Agasiev

Lebedeva

et al. 2002

J. Phys. D: Appl. Phys.

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The new model of incoherent-to-coherent infrared (IR) image converter based on a GaAs photoconductor joined to an electro-optic (EO) Bi12SiO20 crystal has been analysed theoretically and experimentally. The possibility of field transfer from the photoconductor to the EO crystal under the IR radiation sufficient for realization of the EO (Pockels) effect in the EO crystal was assessed. Based on the electric field parameters and the parameters of the photoconductor and EO crystal, the threshold sensitivity of the converter was estimated. The experimental photoconductor-EO crystal structure by which IR radiation (0.9-1.5 µm) was converted into the coherent visible radiation was obtained on the basis of theoretical calculations. The measured threshold sensitivity of the converter, 5×10-4 W cm-2, was found to be in the limits of theoretical estimation.

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“…10 and 11. For the Pockels effect, the transmission T is given by (1) where k = ~(V~}2) and V is the voltage applied to the electro-optic part of the dielectric member. V A / 2 is the voltage required by DKDP for 100% transmission.…”

Section: Introductionmentioning

confidence: 99%

Dependence of the characteristics of a photoconductor−dielectric optical converter on photogeneration and charge transfer parameters of the photoconductor

Rossier¹,

Dumont²

1975

Journal of Applied Physics

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New electro-optic light valve device for image storage and processing

Cited by 23 publications

References 5 publications

Analog electro-optical interface for spectral analysis

Analog electro-optical interface for spectral analysis

Incoherent-to-coherent IR image converter on the basis of GaAs and Bi₁₂SiO₂₀crystals

Dependence of the characteristics of a photoconductor−dielectric optical converter on photogeneration and charge transfer parameters of the photoconductor

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New electro-optic light valve device for image storage and processing

Cited by 23 publications

References 5 publications

Analog electro-optical interface for spectral analysis

Analog electro-optical interface for spectral analysis

Incoherent-to-coherent IR image converter on the basis of GaAs and Bi12SiO20crystals

Dependence of the characteristics of a photoconductor−dielectric optical converter on photogeneration and charge transfer parameters of the photoconductor

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Incoherent-to-coherent IR image converter on the basis of GaAs and Bi₁₂SiO₂₀crystals