Light losses in hollow, prismatic light guides related to prim defects: a transmittance model



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García Fernández, Berta and Vázquez Moliní, Daniel and Álvarez Fernández-Balbuena, Antonio and García Botella, Ángel and Martínez Antón, Juan Carlos (2015) Light losses in hollow, prismatic light guides related to prim defects: a transmittance model. Chinese Optics Letters, 13 (9). 092201. ISSN 1671-7694

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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.

Item Type:Article
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Received March 5, 2015; accepted June 19, 2015; posted online July 27, 2015

Uncontrolled Keywords:Geometric optical design ; Microstructure fabrication ; Testing ; Prisms; Refractive index; Scanning electron microscopy
Subjects:Sciences > Physics > Optics
Medical sciences > Optics > Optical materials
ID Code:39476
Deposited On:17 Oct 2016 13:51
Last Modified:17 Oct 2016 15:25

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