Study of the total light flux measurement of wafer-level LED in a multichannel LED measuring system with non-imaging concentrator array

Yi-Jiun Chen; Yao-Chi Peng; Yu-Tang Chen; Chen-Chin Cheng; Hoang Yan Lin

doi:10.1117/12.2052089

1 May 2014 Study of the total light flux measurement of wafer-level LED in a multichannel LED measuring system with non-imaging concentrator array

Yi-Jiun Chen, Yao-Chi Peng, Yu-Tang Chen, Chen-Chin Cheng, Hoang Yan Lin

Author Affiliations +

Proceedings Volume 9131, Optical Modelling and Design III; 91311R (2014) https://doi.org/10.1117/12.2052089
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

Abstract

To raise the speed of characterizing wafer-level LEDs, simultaneous measurement for both electrical and optical properties in parallel is a necessity. A non-imaging concentrator array is designed to concentrate as much light as possible from LEDs for optical characterization of multiple points on the wafer. For the sake of meeting the requirements between the numerical aperture of the sensing fiber and the emitting half-cone angle from a Lambertian source, a reversed angle transformer (RAT) is used in this study. The simulation is conducted using the commercial software LightTools® , based on the Monte-Carlo ray-tracing method. According to the simulation, the entrance port can collect approximately 94% of radiance from a Lambertian source, and the concentration ratio of RAT is approximately 99%. Finally a design prototype is demonstrated in this paper to validate our design.

Citation Download Citation

Yi-Jiun Chen, Yao-Chi Peng, Yu-Tang Chen, Chen-Chin Cheng, and Hoang Yan Lin "Study of the total light flux measurement of wafer-level LED in a multichannel LED measuring system with non-imaging concentrator array", Proc. SPIE 9131, Optical Modelling and Design III, 91311R (1 May 2014); https://doi.org/10.1117/12.2052089

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