Francisco Jose Torcal-Milla

Este trabajo presenta el diseño y desarrollo preliminar de una pastilla fonocaptora óptica para instrumentos de cuerda basada en modulación FM. El sistema utiliza un emisor óptico y un fotodetector para detectar la luz reflejada por la vibración de la cuerda, minimizando la influencia de la iluminación ambiente y del ruido electromagnético. Se describen el fundamento teórico, el diseño de las distintas etapas electrónicas —modulación, detección, amplificación y filtrado— y la futura validación experimental mediante un monocordio diseñado específicamente para evaluar la viabilidad de la tecnología propuesta.

La corrección de afecciones oculares tales como la miopía, la hipermetropía y el astigmatismo puede llevarse a cabo mediante tres técnicas: con gafa, lentes de contacto y lentes intraoculares. La sustitución del cristalino del paciente por una lente intraocular se lleva a cabo, principalmente, ligada a otras patologías como las cataratas, que impiden la correcta visión por parte del sujeto. Existen diversos tipos de lentes intraoculares: refractivas y refracto-difractivas. Estas últimas ofrecen características deseables como multifocalidad, lo cual es beneficioso para el paciente, pudiendo paliar, al menos de forma parcial, la pérdida de acomodación debida a la extración del critalino. En este trabajo se presenta un estudio preliminar del efecto del descentramiento e inclinación de lentes difractivas sobre la función de transferencia de modulación (MTF) y la anchura del foco.

Classical dynamics is a fundamental pillar of any general physics course. The presentation often starts by showing Newton’s three laws and their applications to Classical dynamics is a fundamental pillar of any general physics course. The presentation often starts by showing Newton’s three laws and their applications to

Nature and physics are inherently interconnected, representing complementary aspects of the same reality. Nature is full of physics-related phenomena that are w Nature and physics are inherently interconnected, representing complementary aspects of the same reality. Nature is full of physics-related phenomena that are w

Dew is a meteorological phenomenon in which the humidity in the air condenses in the form of drops due to a sudden decrease in temperature or contact with cold

Spatial coherence of light sources is usually obtained by using the classical Youngs interferometer. Despite the original experiment has been improved in successive works, some drawbacks still remain. In addition, several pairs of points must be used to characterize the totally the 2D complex-coherence degree of the source. In this work, an alternative based on a modified Mach-Zehnder interferometer which includes a pair of lenses is presented. With this modified Mach-Zehnder interferometer, we are able to measure the spatial coherence length between any two points of the laser beam section simultaneously. The set-up does not have any movable part, which makes it robust and portable. To test it, the two-dimensional spatial coherence of a high-speed laser with two cavities has been measured for different pulse energy values. We observe from the experimental measurements that the complex degree of coherence changes with the selected output energy. Both laser cavities seem to have similar complex coherence degree for maximum energy although it is not symmetrical. Thus, this analysis will allow us to determine the best configuration of the double cavity laser for interferometric applications. Furthermore, the proposed approach can be applied to any other light sources.