title: Precise optical modeling for LED lighting verified by cross correlation in the midfield region.
abstract: A novel LED modeling algorithm for precise three-dimensional light pattern simulation is proposed and demonstrated. We propose to use normalized cross correlation to verify the validity of the simulation in one-dimensional intensity patterns as well as two-dimensional irradiance patterns in various midfield distances and to provide feedback to achieve a successful model. The model is demonstrated to obtain an average of 99% in normalized cross correlation between the simulation light pattern and experimental measurement for a truncated inverse pyramid LED.
authors.affiliation: Institute of Optical Sciences, National Central University, Chung-Li, Taiwan. ccsun@ios.ncu.edu.tw
authors.forename: Ching-Cherng
authors.initials: CC
authors.lastname: Sun
authors.forename: Tsung-Xian
authors.initials: TX
authors.lastname: Lee
authors.forename: Shih-Hsin
authors.initials: SH
authors.lastname: Ma
authors.forename: Ya-Luan
authors.initials: YL
authors.lastname: Lee
authors.forename: Shih-Ming
authors.initials: SM
authors.lastname: Huang