Design and optimization of dot pattern in illumination lightpipe of natural light guiding system

Zong-Yi Lee; Yi-Yung Chen; Allen Jong-Woei Whang

doi:10.1117/12.825434

21 August 2009 Design and optimization of dot pattern in illumination lightpipe of natural light guiding system

Zong-Yi Lee, Yi-Yung Chen, Allen Jong-Woei Whang

Proceedings Volume 7429, Novel Optical Systems Design and Optimization XII; 74290A (2009) https://doi.org/10.1117/12.825434
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

In recent years, the practicality and importance of the illumination with sunlight are getting more seriously concern in public. The reason is that natural light is non-polluting, energy-saving, and healthy in comparison with traditional light sources. Therefore, our research focuses on how to replace the artificial sources by natural light. A Natural Light Guiding System has collecting, transmitting, and lighting parts. For replacing the traditional sources, the lighting part should have similar characteristic, such as intensity distribution and geometric parameters, to artificial sources. In this paper, we design, simulate, and optimize illumination lightpipe with dot pattern to redistribute the collecting sunlight from Natural Light Guiding System. The lightpipe includes input, system, and output parts. In the input part, we design a coupler to improve the coupling efficiency with natural light. For optimizing the efficiency of the coupler, we evaluate the relationship between the distance that is from the fiber to the lightpipe and the coupled power. In the system part, the sunlight is locked by total internal reflection, TIR, so we design dot pattern to scatter the locked sunlight for uniform lighting. In the output part, a uniform illumination is our goal. For designing the percentage of the surface will be covered by dot pattern, we offer a design theory and simulate the efficiency.

Citation Download Citation

Zong-Yi Lee, Yi-Yung Chen, and Allen Jong-Woei Whang "Design and optimization of dot pattern in illumination lightpipe of natural light guiding system", Proc. SPIE 7429, Novel Optical Systems Design and Optimization XII, 74290A (21 August 2009); https://doi.org/10.1117/12.825434

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

Includes PDF, HTML & Video, when available