Programa de Doctorat en Enginyeria Òptica: Recent submissions
Now showing items 41-60 of 71
Calidad óptica ocular en ojos sometidos a cirugía refractiva y afecciones patológicas
This dissertation deals with the evaluation of ocular optical quality in two types of patients. First, are patients who have undergone different surgical techniques of refractive surgery to correct different degrees of ...
Desarrollo de un sistema de doble paso compacto y de bajo coste para la evaluación de la calidad óptica y la difusión intraocular
The purpose of this PhD thesis was to design, implement and validate a low cost compact system based on the double-pass I technique in order to evaluate the viability of its use in the future in optical instrumentation ...
Estratègia 2D per al disseny de reflectors amb facetes de forma lliure
This work can be framed in the field of computer-aided optical systems design and it is a part of a larger project in which automated processes are studied and implemented aiming to reduce the time span that stands between ...
Diseño, estudio y validación de una lente de contacto de gradiente de potencia para controlar la miopía = Design, study and validation of a radial refractive gradient contact lens for myopia control
Myopia is the main cause of vision loss worlwide, with associated ocular pathology risks related to myopia amount. Therefore, interventions directed towards limiting or preventing the progression of myopia are of high ...
Generalized ray tracing method for the calculation of the peripheral refraction induced by an ophthalmic lens
This thesis proposes a method to evaluate and quantify in a precise way the peripheral refraction induced by an ophthalmic lens. The motivation for this work stems from the progression of myopia and its possible causes; ...
Una metodología de selección de iluminantes y diseño de la distribución espectral de fuentes lumínicas para la adecuada exhibición y preservación de obras de arte en museos
In this study a new methodology of evaluation and design of light spectral composition for use in museums is presented. The hypothesis under this doctoral thesis is explained in three parts: a) it is factible to obtain a ...
Caracterización óptica de lentes intraoculares = Optical characterization of intraocular lenses
The optical characterization of an intraocular lens (IOL) provides objective and quantitative information that is essential to fully understand its performance as an implant that replaces the crystalline lens in the human ...
Whispering gallery microresonator for second harmonic light generation
In recent years, it has been proposed that circular microresonators may become an important element in the core of many photonic devices. The high Q-factors seen in fused silica micro-spheres and micro-toroids for light ...
Diseño e implementación de un sistema multiespectral en el rango ultravioleta, visible e infrarrojo : aplicación al estudio y conservación de obras de arte
Multispectral systems have several applications and there are different possible configurations in which they can be implemented. Different characteristics make them useful, but the basic one is the access to spectral ...
Comprehensive retinal image analysis: image processing and feature extraction techniques oriented to the clinical task
Medical digital imaging has become a key element of modern health care procedures. It provides a visual documentation, a permanent record for the patients, and most importantly the ability to extract information about many ...
Adaptive self-mixing interferometry for metrology applications
Among the laser based techniques proposed for metrology applications, classical interferometers offer the highest precision measurements. However, the cost of some of the elements involved and the number of optical components ...
Método de cálculo de desalineamientos en sistemas ópticos. Aplicación mediante redes neuronales.
En aquesta tesis doctoral es presenta un nou mètode per al càlcul de desalineaments en sistemes òptics a partir del front d'ona a la sortida del sistema. El mètode parteix de l'ajust de polinomis de Zernike al front d'ona ...
Derivation of analytical refraction, propagation and reflection equations for higher order aberrations of wavefronts
Derivation of analytical refraction, propagation and reflection equations for Higher Order Aberrations of wavefronts From literature the analytical calculation of Lower Order Aberrations (LOA) of a wavefront after refraction, ...
Desarrollo de un algoritmo de propagación de flujo luminoso para un dispositivo fotométrico móvil con capacidad de discretización angular: aplicación a la generación de mapas de iluminación de alumbrado público
Esta tesis doctoral aborda el desarrollo de un algoritmo de propagación del flujo luminoso que permite a un dispositivo fotométrico realizar las medidas de la distribución de iluminación en grandes áreas, entre las cuales ...
Hemianopsias homónimas completas: estudio de las técnicas de rehabilitación y calidad de vida
Las hemianopsias homónimas se pueden definir como la pérdida absoluta o parcial de la visión en las mitades derechas o izquierdas de los campos visuales de ambos ojos. Los pacientes que sufren un defecto hemianópsico ...
Medida de la respuesta acomodativa con un sistema de doble paso: aplicación al estudio de la acomodación en función de la edad.
Accommodation, defined as the dioptric change of the eye, enables clear vision at different distances. Its study is interesting due to different aspects: the progressive loss of amplitude of accommodation known as presbyopia, ...
Novel approach to improve the assessment of biodiversity of phytoplankton communities based on hyperspectral data analysis
La gestió sostenible dels ecosistemes marins requereix d'un millor coneixement de la distribució de certs paràmetres ecològics com les comunitats de fitoplàncton, inclosos aquells grups algals causants d'afloraments. La ...
Nuevas evidencias sobre la anisotropía del espacio visual y la influencia del entorno en el rendimiento visual
Desde hace años se han realizado múltiples investigaciones que tratan sobre la fiabilidad de la percepción de las distancias en profundidad y la influencia del entorno. En ocasiones, las pistas presentes en el espacio ...
Determinació del factor de cobertura en teixits de calada per processament de la imatge digital i espectroscòpia de reflexió
In this thesis we applied, in a complementary way, techniques of digital image processing and reflectance spectroscopy to perform cover factor (CF) measurements in monochrome openwork fabrics. To evaluate the results ...
Técnicas de reconstrucción y compensación activa de frentes de onda complejos
The continuous improvements of optical design tools and manufacturing technologies of free-form optical elements, allow the creation of new complex-shaped lenses that improve the performance of traditional optical systems ...
