Open AccessModeling the irradiation pattern of LEDs at short distances
Author(s) -
Iván Moreno,
P. X. Viveros-Méndez
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.419428
Subject(s) - light emitting diode , optics , irradiance , irradiation , materials science , phosphor , optoelectronics , convolution (computer science) , diode , kernel (algebra) , led lamp , computer science , physics , artificial intelligence , mathematics , combinatorics , artificial neural network , nuclear physics
A method for modeling the irradiance spatial distribution by light-emitting diodes (LEDs) on near distance targets has been developed. The model can easily handle the complex simulation of non-homogenous emitting LEDs, multichip LEDs, LED arrays, and phosphor coated LEDs. The LED irradiation profile is obtained by image processing one photograph of the emitting LED, taken with a smartphone. The method uses image convolution or image correlation between the LED image and a special kernel. The model provides the irradiation spatial pattern in function of the irradiation distance. And the model is tested both with theory and with experimental measurements.