Divergence characteristics of light spot of a circular LED array
-
1.
Institute of Design and Art, Chongqing Technology and Business University, Chongqing 400067, China;
-
2.
College of Computer Science and Information Engineering, Chongqing Technology and Business University, Chongqing 400067, China
-
Received Date:
2014-09-01
Accepted Date:
2015-01-07
-
Abstract
In order to obtain divergence feature of light spot of a circular light emitting diode(LED) array, illumination formula, and light spot radius formula and divergence angle formula of a circular LED array were deduced by using single LED illumination formula. The dependence of the divergence angle of a circular LED array on the m value, array radius and target distance were analyzed theoretically by using numerical methods. The change data of divergence angle under three conditions were obtained. The results show that the divergence angle decreases with the increase of m value and array radius. However, the divergence angle increases with the increase of target distance. The results are helpful for the illumination source design with circular LED arrays.
-
-
References
|
[1]
|
DING Y,LIU X,ZHENG Z R. Freeform LED lens foruniform illumination[J]. Optics Express, 2008, 16(17): 12958-12966. |
|
[2]
|
SU Z P, QUE L Z, ZHU Z W. Optical system design of the compact collimator for LED source[J]. Laser Optoelectronics Progress, 2012, 49(2): 0222031(in Chinese). |
|
[3]
|
SUN C C,CHEN C Y,HE H Y. Precise optical modeling for silicate-based white LEDs[J]. Optics Express, 2008, 16(24): 20060-20066. |
|
[4]
|
SUN C C,CHIEN W T,MORENO I. Analysis of the far-field region of LEDs[J]. Optics Express, 2009, 17(12): 13918-13922. |
|
[5]
|
WANG K, LIU S,CHEN F,et al. Freeform LED lens for rectangularly prescribed illumination[J]. Journal of Optics, 2009, A11(10): 105501-105505. |
|
[6]
|
DING Y, GU P F. Freeform reflector for uniform illumination[J]. Acta Optica Sinica, 2007, 27(3): 540-544(in Chinese). |
|
[7]
|
DING Y, ZHENG Z R, GU P F. Freeform lens design for LED illumination[J]. Acta Photonica Sinica, 2009, 38(6): 1486-1490(in Chinese). |
|
[8]
|
LUO X X, LIU H, LU Z W, et al. Automated optimization of free-form surface lens for LED collimation[J]. Acta Photonica Sinica, 2011,40(9): 1351-1355(in Chinese). |
|
[9]
|
WANG J W,CHEN Y Y,TENG Y T. Designing uniform illuminance systems by surface-tailored lens and configurations of LED arrays[J]. Journal of Dispersion and Technology, 2009, 41(5): 94-103. |
|
[10]
|
QIN Z,WANG K,CHEN F. Analysis of condition for uniform lighting generated by array of light emitting diodes with large view angle[J]. Optics Express, 2010, 18(2): 17460-17476. |
|
[11]
|
SU Z P,XUE D L,JI Z C. Designing LED array for uniform illumination distribution by simulated annealing algorithm[J]. Optics Express, 2012, 20(s6): 843-855. |
|
[12]
|
WANG J W, SU Z P, YUAN Z J, et al. Study on uniformity of LED array illumination distribution on target plane[J]. Acta Photonica Sinica, 2014, 43(6): 919-924(in Chinese). |
|
[13]
|
ZHAO Z P,JI L Y,SHEN Y X. Research of illumination uniformity for LED arrays based on PSO algorithm[J]. Chinese Journal of Luminescence, 2013, 34(12): 1677-1681(in Chinese). |
-
-
Proportional views
-
Map
DownLoad: