Effects of radiation characteristic and luminous efficiency for LED lampshade with cylindrical lens

Hsi-Chao Chen; Jun-Yu Lin; Chi-Hao Yang; Yi-Xuan Lu

doi:10.1117/12.861351

18 August 2010 Effects of radiation characteristic and luminous efficiency for LED lampshade with cylindrical lens

Hsi-Chao Chen, Jun-Yu Lin, Chi-Hao Yang, Yi-Xuan Lu

Proceedings Volume 7784, Tenth International Conference on Solid State Lighting; 77841A (2010) https://doi.org/10.1117/12.861351
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

Light emitting diode (LED) is an environmental-friendly product and could be a main lighting source in future. The research was to design a suitable LED lampshade for the street lighting. The radiation characteristic was required to be a rectangular distribution at the divergence-angle ratio of 7:3 for the x and y directions. Hence a design of two cylindrical lenses on the lampshade was used for the lighting distribution. Then an optimal simulation of these curvatures was done for the luminous distribution and efficiency. Final we got a rectangular lighting of the divergence-angle ratio of 7:3 and the radiator characteristic of bat-wing. The tolerance analyses of LED source distances were done on the x, y and z directions. The z direction was more sensibility than x and y directions for luminous efficiency and its tolerance must be kept under ±0.5mm for the illumination efficiency to be over 95%. Anyway, the similar extent could reach to 98.46% by Normalized Cross Correlation (NCC) between experimental and simulation and the error extent could reduce to 6.87% by Root Mean Square (RMS) error mode. The total luminance efficiency could reach to 92% without AR coating.

Citation Download Citation

Hsi-Chao Chen, Jun-Yu Lin, Chi-Hao Yang, and Yi-Xuan Lu "Effects of radiation characteristic and luminous efficiency for LED lampshade with cylindrical lens", Proc. SPIE 7784, Tenth International Conference on Solid State Lighting, 77841A (18 August 2010); https://doi.org/10.1117/12.861351

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