Lighting quality for aluminum and prismatic light guides

Berta García-Fernández; Daniel Vázquez-Molini; Antonio Álvarez Fernández-Balbuena

doi:10.1117/12.896814

21 September 2011 Lighting quality for aluminum and prismatic light guides

Berta García-Fernández, Daniel Vázquez-Molini, Antonio Álvarez Fernández-Balbuena

Author Affiliations +

Proceedings Volume 8170, Illumination Optics II; 81700T (2011) https://doi.org/10.1117/12.896814
Event: SPIE Optical Systems Design, 2011, Marseille, France

Abstract

The use of high reflectance aluminum lighting guides is most frequently used material for actual natural lighting systems. Spectral Reflectance over the entire length of a light guide changes the color of the output light at the end of the guide. When light guides are made of a prismatic film, the influence of the reflectance is minimizing and absortance is not important when the sheets are thin. Color Rendering index and color temperature will be important parameters in order to evaluate Lighting quality and therefore in Museums, office buildings and production centers to get the normative approval. In this paper a theoretical simulation and 3D ray tracing for aluminum and prismatic light guides of different shapes (rectangular and cylindrical) and lengths over the entire visible spectrum are studied. Output light color temperature related to several illuminants and CRI are evaluated for the simulated aluminum and prismatic light guides. Thus, prismatic light guides seem more robust in lighting quality maintenance regardless of conditionals like angle acceptance for TIR guiding, aluminum guides are efficient and maintain light quality only for short distances.

Citation Download Citation

Berta García-Fernández, Daniel Vázquez-Molini, and Antonio Álvarez Fernández-Balbuena "Lighting quality for aluminum and prismatic light guides", Proc. SPIE 8170, Illumination Optics II, 81700T (21 September 2011); https://doi.org/10.1117/12.896814

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE