Inhomogeneous source uniformization using a shell mixer Köhler integrator

Chaves, Julio; Cvetkovic, Aleksandra; Mohedano, Rubén; Dross, Oliver; Hernández Sanz, Maikel; Benitez Gimenez, Pablo; Miñano Dominguez, Juan Carlos y Vilaplana, J. (2012). Inhomogeneous source uniformization using a shell mixer Köhler integrator. En: "Proceedings of SPIE. Optical Systems Design", 26/11/2012 - 29/11/2012, Barcelona, España. pp. 855021-8550212. https://doi.org/10.1117/12.981004.

Descripción

Título: Inhomogeneous source uniformization using a shell mixer Köhler integrator
Autor/es:
  • Chaves, Julio
  • Cvetkovic, Aleksandra
  • Mohedano, Rubén
  • Dross, Oliver
  • Hernández Sanz, Maikel
  • Benitez Gimenez, Pablo
  • Miñano Dominguez, Juan Carlos
  • Vilaplana, J.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Proceedings of SPIE. Optical Systems Design
Fechas del Evento: 26/11/2012 - 29/11/2012
Lugar del Evento: Barcelona, España
Título del Libro: Proceedings of SPIE. Optical Systems Design
Fecha: Diciembre 2012
Volumen: 8550
Materias:
Palabras Clave Informales: Diffusers ; Lenses ; Light sources ; Optical systems ; Optics ; Ray tracing ; Simulations
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Electrónica Física
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

High flux and high CRI may be achieved by combining different chips and/or phosphors. This, however, results in inhomogeneous sources that, when combined with collimating optics, typically produce patterns with undesired artifacts. These may be a combination of spatial, angular or color non-uniformities. In order to avoid these effects, there is a need to mix the light source, both spatially and angularly. Diffusers can achieve this effect, but they also increase the etendue (and reduce the brightness) of the resulting source, leading to optical systems of increased size and wider emission angles. The shell mixer is an optic comprised of many lenses on a shell covering the source. These lenses perform Kohler integration to mix the emitted light, both spatially and angularly. Placing it on top of a multi-chip Lambertian light source, the result is a highly homogeneous virtual source (i.e, spatially and angularly mixed), also Lambertian, which is located in the same position with essentially the same size (so the average brightness is not increased). This virtual light source can then be collimated using another optic, resulting in a homogeneous pattern without color separation. Experimental measurements have shown optical efficiency of the shell of 94%, and highly homogeneous angular intensity distribution of collimated beams, in good agreement with the ray-tracing simulations.

Más información

ID de Registro: 19723
Identificador DC: http://oa.upm.es/19723/
Identificador OAI: oai:oa.upm.es:19723
Identificador DOI: 10.1117/12.981004
URL Oficial: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1486635
Depositado por: Memoria Investigacion
Depositado el: 14 Sep 2013 10:21
Ultima Modificación: 21 Abr 2016 20:59
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