Abstract
This paper proposes both symmetrical and asymmetric Y-junctions with arc-bend branch structures for auxiliary indoor-illumination applications. These arc-bend branch structures can be used as a concave-mirror-like light guide, to change the direction of beam propagation and also to converge the beam spread angle. Optical simulation results show that the proposed arc-bend Y-junctions can achieve an inner coupling efficiency, not including plastic/air interfaces, above 90% in both usages: beam combiner and splitter. Particularly, when the applied branch opening angle becomes large, this high optical efficiency becomes more significant than those of linear straight Y-junctions. Moreover, it is also confirmed that the coupling efficiency of the symmetric arc-bend junction can be as high as 90.0%, and the asymmetric coupling efficiency is 93.4%, even if the branch opening angle is quite large.
| Original language | English |
|---|---|
| Pages (from-to) | 387-394 |
| Number of pages | 8 |
| Journal | Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an |
| Volume | 41 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2018 Jul 4 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
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Highly efficient Y-junctions with arc-bend branch structures of sunlight guiding systems for indoor illumination. / Liu, Te Shu; Chen, Jin-Jia; Huang, Kuang Lung.
In: Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an, Vol. 41, No. 5, 04.07.2018, p. 387-394.Research output: Contribution to journal › Article
TY - JOUR
T1 - Highly efficient Y-junctions with arc-bend branch structures of sunlight guiding systems for indoor illumination
AU - Liu, Te Shu
AU - Chen, Jin-Jia
AU - Huang, Kuang Lung
PY - 2018/7/4
Y1 - 2018/7/4
N2 - This paper proposes both symmetrical and asymmetric Y-junctions with arc-bend branch structures for auxiliary indoor-illumination applications. These arc-bend branch structures can be used as a concave-mirror-like light guide, to change the direction of beam propagation and also to converge the beam spread angle. Optical simulation results show that the proposed arc-bend Y-junctions can achieve an inner coupling efficiency, not including plastic/air interfaces, above 90% in both usages: beam combiner and splitter. Particularly, when the applied branch opening angle becomes large, this high optical efficiency becomes more significant than those of linear straight Y-junctions. Moreover, it is also confirmed that the coupling efficiency of the symmetric arc-bend junction can be as high as 90.0%, and the asymmetric coupling efficiency is 93.4%, even if the branch opening angle is quite large.
AB - This paper proposes both symmetrical and asymmetric Y-junctions with arc-bend branch structures for auxiliary indoor-illumination applications. These arc-bend branch structures can be used as a concave-mirror-like light guide, to change the direction of beam propagation and also to converge the beam spread angle. Optical simulation results show that the proposed arc-bend Y-junctions can achieve an inner coupling efficiency, not including plastic/air interfaces, above 90% in both usages: beam combiner and splitter. Particularly, when the applied branch opening angle becomes large, this high optical efficiency becomes more significant than those of linear straight Y-junctions. Moreover, it is also confirmed that the coupling efficiency of the symmetric arc-bend junction can be as high as 90.0%, and the asymmetric coupling efficiency is 93.4%, even if the branch opening angle is quite large.
UR - http://www.scopus.com/inward/record.url?scp=85049805411&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049805411&partnerID=8YFLogxK
U2 - 10.1080/02533839.2018.1482238
DO - 10.1080/02533839.2018.1482238
M3 - Article
AN - SCOPUS:85049805411
VL - 41
SP - 387
EP - 394
JO - Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers
JF - Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers
SN - 0253-3839
IS - 5
ER -