RT Book, Section
T1 Skylight: a hollow prismatic CPC
A1 Álvarez Fernández-Balbuena, Antonio
A1 Vázquez Molini, Daniel
A1 García Fernández, Berta
A1 García Botella, Angel
A1 Bernabéu Martínez, Eusebio
A2 Winston, Roland
A2 Gordon, Jeffrey M.
AB Many applications involve the use of a compound parabolic concentrator (CPC) like, natural lighting, thermal applications, optics for illuminators, optical fibre coupling and solar energy. The use of a CPC in reverse mode for natural lighting gives the chance to use it as a lighting skylight in ceilings because light output is controlled inside the design angle, on the contrary having a low flux transfer ratio because of the reduced area of the entrance pupil regarding exit pupil. The authors propose an innovative 3D hollow prismatic CPC (HPCPC) made of a dielectric material, which has a high efficiency comparing it with aluminium CPC. The basic idea is to use a hollow prismatic light guide with CPC shape. This paper reports 2D, 3D design and numerical analysis by raytracing software, also experimental results are shown. The system works almost like a true CPC when light enters through standard entrance pupil and also collect light that enters outside entrance pupil. Performance and efficiency of the prismatic CPC is in average 300% higher than standard aluminium CPC for collimated light in a range from 0º to 85º. A prototype has been developed and tested.
PB SPIE
SN 0277-786X
YR 2009
FD 2009
LK https://hdl.handle.net/20.500.14352/101327
UL https://hdl.handle.net/20.500.14352/101327
LA eng
NO Fernandez-Balbuena, A. A., Vázquez-Moliní, D., Garcia-Fernandez, B., Garcia-Botella, A., & Bernabeu, E. (2009, August). Skylight: a hollow prismatic CPC. In Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI (Vol. 7423, pp. 239-250). SPIE.
NO Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States.© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).
DS Docta Complutense
RD 9 abr 2025