Study of CCT varying by volume scattering diffuser with moving and rotating white light LED

Shih-Hsin Ma; Liang-Shiun Chen; Wen-Chao Huang

doi:10.1117/12.2061564

25 September 2014 Study of CCT varying by volume scattering diffuser with moving and rotating white light LED

Shih-Hsin Ma, Liang-Shiun Chen, Wen-Chao Huang

Proceedings Volume 9192, Current Developments in Lens Design and Optical Engineering XV; 91921C (2014) https://doi.org/10.1117/12.2061564
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

In this study, the corrected color temperature (CCT) of white light, which originates from a white light LED (WLLED) and passes through a volume-scattering diffuser (VSD), is investigated. The VSD with thickness of 2mm is fabricated by mixing the 2um-sized PMMA scattering particles and the epoxy glue with different concentration values. Moreover, in order to understand the influences of the illuminated area and the scattering path of VSD on CCT values, the bulletheaded and lambertian-type WLLEDs are assembled for different positions and distinct orientations along the optical axis in a black cavity. A detailed comparison between results regarding the white light with and without passing through the VSD is offered. The results of this research will help to improve the colorful consistency of the LED lamps which use diffusers.

Citation Download Citation

Shih-Hsin Ma, Liang-Shiun Chen, and Wen-Chao Huang "Study of CCT varying by volume scattering diffuser with moving and rotating white light LED", Proc. SPIE 9192, Current Developments in Lens Design and Optical Engineering XV, 91921C (25 September 2014); https://doi.org/10.1117/12.2061564

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