Search results for "RECORD"
showing 10 items of 809 documents
<title>Relief holographic recording in amorphous As-S-Se</title>
2003
The relief-phase holographic gratings in amorphous As-S-Se thin films were recorded and studied. The holographic recording was performed by He-Ne laser (0.6328 μm). The influence of etching and cohernet self-enhancement processes on the formation of surface relief in amorphous As-S-Se thin films was studied.© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Photoinduced direct surface relief formation in amorphous As40S15Se45 films
2013
Abstract The surface relief grating formation in As40S15Se45 films under He–Ne laser wave-length λ = 0.6328 μm light influence was examined. The obtained experimental results showed the strong dependence of photoinduced surface relief depth on illumination dose and film thickness during holographic recording from film side as well as from glass substrate side. The surface relief grating profile over the thickness range 0.13
Photoplethysmography Device for Detection of Changes in the Vasomotor Parameters of Small Laboratory Animals
2008
A device for observation of changes in vasomotor parameters of small laboratory animals with limited blood amount has been developed. The device contains cw laser sources (635 nm, 650nm or 980 nm), photodetector, amplifier of the absorption photoplethysmography signal and special software for data recording.
Holographic recording in amorphous chalcogenide thin films
2003
A review of the recent advances and developments in the practical application of chalcogenide materials is presented, focusing special attention on holography and lithography using amorphous chalcogenide thin films.
Usage of moving nanoparticles for improved holographic recording
2013
Metal nanoparticles are used for different applications in holographic configurations. The metal nanoparticles are placed close to an object and encode it by a time varying random mask. A decoding mask is computed and used to obtain super-resolution digital hologram and eliminate the twin image and DC from a digital hologram. The method is also shown to be applicable for other optical methods.
Effect of structure relaxation on the holographic recording in amorphous As2S3 films
1997
Abstract Results of the experimental studies of holographic recording in a-As 2 S 3 films, such as exposure and intensity dependences, spatial frequency dependence, are reported. Several peculiarities are found including recording intensity threshold, nonmonotonical intensity dependences, nonlinear exposure curves, the change of the spatial frequency response due to film aging. These peculiarities are explained in terms of the phenomenological model which is based on the simultaneous action of the photostructural changes and the relaxational structural changes.
Resolution enhancement and orders separation in on-axis nanoparticles based digital holography
2013
A method for eliminating the unwanted terms in an on axis hologram is presented. Free randomly distributed nanoparticles are used to encode and later on to decode/separate the desired term from the unwanted aberrations.
The structure of PLZT ceramics and holographic recording
1992
Abstract The influence of the specific structure of transparent PLZT X/65/35 [Pb1-xLax (Zr.65Ti.35)1-x/4O3] ceramics with x = 8.5% and IO% on photorefraction and peculiarities of holographic recording have been studied.
Azodyed gelatin films for holographic recording
2013
Abstract In this work we present a preparation method of azo-dyed gelatin thin films for holographic recording and their photoinduced changes of optical properties. The non-toxic, commercially available and cheap ingredients were used for film preparation. The films were prepared by mixing azo-dyes with gelatin solution. The photoinduced properties of prepared films were investigated. The photoinduced dichroism and birefringence at 532 nm laser radiation were observed. The holographic recording of surface and volume gratings by 532 nm wavelength laser radiation were performed and surface relief gratings were studied with AFM. The mass transport direction in azodyed gelatin was studied.
La influencia del género en el aprendizaje matemático en España. Evidencias desde PISA
2020
espanolDiferentes estudios muestran como el factor genero es una variable que incide en el rendimiento matematico. El presente articulo indaga sobre la existencia y evolucion de una brecha de genero en el aprendizaje de las matematicas en Espana, con base a los resultados de la evaluacion del Programa Internacional para la Evaluacion de Estudiantes (PISA) en todas sus ediciones. Se valora tambien la competencia matematica de los alumnos espanoles, sin diferencia de genero. Se ha realizado una revision bibliografica de los ultimos 30 anos y un analisis multisectorial de los datos suministrados por los informes PISA. En el historico los resultados destacan un mejor desempeno por competencias …