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

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

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 surface...

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Bibliographic Details
Published in:Chinese optics letters Vol. 13; no. 9; pp. 68 - 72
Main Authors: Berta Garcia-Fernandez, Berta Garcia-Fernandez, Daniel Vazquez-Molini, Daniel Vazquez-Molini, Antonio Alvarez Fernandez-Balbuena, Antonio Alvarez Fernandez-Balbuena, Angel Garcia-Botella, Angel Garcia-Botella, Juan Carlos Martinez Anton, Juan Carlos Martinez Anton
Format: Journal Article
Language:English
Published: 10-09-2015
Subjects:
光反射
光学
光折射
光本性
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Summary: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 tech- nique are conducted to determine if there are defects in the corners of the prisms. A model for light guide trans- mittance 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.
Bibliography:31-1890/O3
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 tech- nique are conducted to determine if there are defects in the corners of the prisms. A model for light guide trans- mittance 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.
ISSN:1671-7694
DOI:10.3788/COL201513.092201