Search results for "Polarimetry"
showing 4 items of 84 documents
Pulsations of HD 181231
2009
HD181231 is a B5IVe star, which has been observed with the CoRoT satellite during ~5 consecutive months and simultaneously from the ground in spectroscopy and spectropolarimetry. By analysing these data, we aim to detect and characterize as many pulsation frequencies as possible, to search for the presence of beating effects possibly at the origin of the Be phenomenon. Our results will also provide a basis for seismic modelling. The fundamental parameters of the star are determined from spectral fitting and from the study of the circumstellar emission. The CoRoT photometric data and ground-based spectroscopy are analysed using several Fourier techniques: Clean-ng, Pasper, and Tisaft, as wel…
Relationship Between Visual Field Sensitivity and Retinal Nerve Fiber Layer Thickness Measured by Scanning Laser Polarimetry and Optical Coherence To…
2009
Purpose: To evaluate the correlation between automated achromatic perimetry (AAP) and the output of two retinal nerve fiber layer (RNFL) analysers: scanning laser polarimetry (GDx-VCC) and optical coherence tomography (OCT). Methods: Quantitative RNFL measurements with GDx-VCC and Stratus-OCT were obtained in one eye from 52 healthy subjects, 38 ocular hypertensive (OHT) patients and 94 glaucomatous patients. All patients underwent a complete examination, including AAP using the Swedish interactive threshold algorithm (SITA). The relationship between RNFL measurements and SITA visual field global indices were assessed by means of the following methods: analysis of variance, bivariate Pearso…
Coroideremia: seguimiento durante un año con polarimetría láser
2008
espanolCaso clinico: Presentamos el seguimiento de un caso de coroideremia que fue sometido a tres campos visuales automatizados blanco-blanco y tres polarimetrias laser (PL) con GDx VCC en el transcurso de un ano. Se encontro un deterioro perimetrico en indices y escotomas. En concordancia, los parametros de retardo de la capa de fibras nerviosas de la retina y los mapas cambiaron en un analisis serial avanzado con GDx VCC en los dos ojos. Discusion: El analisis con GDx VCC puede ser un metodo objetivo y cuantitativo para evaluar la progresion de las distrofias coriorretinianas como la coroideremia. EnglishCase report: We report the follow-up of a case of choroideremia who underwent three …
Polymorphic chiral squaraine crystallites in textured thin films
2020
Chirality 32(5), 619 - 631 (2020). doi:10.1002/chir.23213