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Memorias de investigación
Ponencias en congresos:
Primary optics for efficient high-brightness LED color mixing
Áreas de investigación
  • Ingenierías
In SSL general illumination, there is a clear trend to high flux packages with higher efficiency and higher CRI addressed with the use of multiple color chips and phosphors. However, such light sources require the optics provide color mixing, both in the near-field and far-field. This design problem is specially challenging for collimated luminaries, in which diffusers (which dramatically reduce the brightness) cannot be applied without enlarging the exit aperture too much. In this work we present first injection molded prototypes of a novel primary shell-shaped optics that have microlenses on both sides to provide Köhler integration. This shell is design so when it is placed on top of an inhomogeneous multichip Lambertian LED, creates a highly homogeneous virtual source (i.e, spatially and angularly mixed), also Lambertian, which is located in the same position with only small increment of the size (about 10-20%, so the average brightness is similar to the brightness of the source). This shell-mixer device is very versatile and permits now to use a lens or a reflector secondary optics to collimate the light as desired, without color separation effects. Experimental measurements have shown optical efficiency of the shell of 95%, and highly homogeneous angular intensity distribution of collimated beams, in good agreement with the ray-tracing simulations.
Nombre congreso
Efficient Design for Illumination and Solar Concentration IX Nonimaging Optics
Tipo de participación
Lugar del congreso
San Diego, CA, USA
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Título de las actas
Proc. of SPIE Vol. 8485 84850Q
Esta actividad pertenece a memorias de investigación
  • Autor: Aleksandra Cvetkovic . (UPM)
  • Autor: R Mohedano (LPI)
  • Autor: O. Dross (Philips Research,)
  • Autor: Maikel Hernández Sanz (UPM)
  • Autor: Pablo Benitez Gimenez (UPM)
  • Autor: Juan Carlos Miñano Dominguez (UPM)
  • Autor: J.Vilaplanalana Vilaplana (LPI)
  • Autor: J. Chaves (LPI)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Ingeniería Óptica
  • Centro o Instituto I+D+i: Centro de Domótica Integral, CEDINT
  • Departamento: Electrónica Física
S2i 2023 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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