Person:
Martínez Antón, Juan Carlos

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First Name
Juan Carlos
Last Name
Martínez Antón
URI
https://hdl.handle.net/20.500.14352/79892
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Óptica
Area
Optica
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2011 - 20152
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Author: Vázquez Moliní, Daniel × Subject: 681.7 ×

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    Light losses in hollow, prismatic light guides related to prim defects: a transmittance model
    (Chinese Optics Letters, 2015) García Fernández, Berta; Vázquez Moliní, Daniel; Álvarez Fernández-Balbuena, Antonio; García Botella, Ángel; Martínez Antón, Juan Carlos
    Hollow, cylindrical, prismatic light guides (CPLGs) are optical components that, using total internal reflection (TIR), are able to transmit high-diameter light beams in daylight and artificial lighting applications without relevant losses. It is necessary to study the prism defects of their surfaces to quantify the behavior of these optical components. In this Letter, we analyze a CPLG made of a transparent dielectric material. Scanning electron microscopy (SEM) and the topographic optical profilometry by absorption in fluids (TOPAF) imaging technique are conducted to determine if there are defects in the corners of the prisms. A model for light guide transmittance that is dependent on prism defects is proposed. Finally, a simulation and an experimental study are carried out to check the validity of the proposed model.
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    Method for the characterization of Fresnel lens flux transfer performance
    (Proceedings of SPIE, 2011) Martínez Antón, Juan Carlos; Vázquez Moliní, Daniel; Muñóz de la Luna, Javier; Gómez Pedrero, José Antonio; Álvarez Fernández-Balbuena, Antonio
    Fresnel lenses and other faceted or micro-optic devices are increasingly used in multiple applications like solar light concentrators and illumination devices, just to name some representative. However, it seems to be a certain lack of adequate techniques for the assessment of the performance of final fabricated devices. As applications are more exigent this characterization is a must. We provide a technique to characterize the performance of Fresnel lenses, as light collection devices. The basis for the method is a configuration where a camera images the Fresnel lens aperture. The entrance pupil of the camera is situated at the focal spot or the conjugate of a simulated solar source. In this manner, detailed maps of the performance of different Fresnel lenses are obtained for different acceptance angles.