TY - JOUR
T1 - Equiangular-spiral bent lightpipes with arbitrary bent angle
AU - Chu, Shu Chun
AU - Cheng, Yi Kai
AU - Chern, Jyh Long
N1 - Funding Information:
This work was supported in part by a grant from the National Science Council of Taiwan, R.O.C., under Contract No. NSC 96-2112-M-006-019-MY3. We also thank Lambda Research Corporation for their support in providing the simulation package TracePro.
Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/5/15
Y1 - 2009/5/15
N2 - A recent study proposed the concept of a leakage-free bent lightpipe with an equiangular-spiral shape [S.-C. Chu, J.-L. Chern, Opt. Lett. 30 (2005) 3006]. This paper extends the design of a leakage-free equiangular-spiral bent lightpipe with arbitrary-bend-angle and addresses in detail the mathematical formalism required to build such an equiangular-spiral bent lightpipe. Furthermore, a comparison of the proposed equiangular-spiral bent lightpipe and a conventional circular bent lightpipe is provided. Numerical verifications are discussed, and experimental explorations with different bent shapes and angles are carried out for comparison. Results show that equiangular-spiral bent lightpipes with different bent angles exhibit a theoretical 100% transmission with more than 76% efficiency when practically propagating, which is much better than conventional circular bent lightpipes. The output irradiance distributions of bent lightpipes with different bent shapes are also investigated. Crown
AB - A recent study proposed the concept of a leakage-free bent lightpipe with an equiangular-spiral shape [S.-C. Chu, J.-L. Chern, Opt. Lett. 30 (2005) 3006]. This paper extends the design of a leakage-free equiangular-spiral bent lightpipe with arbitrary-bend-angle and addresses in detail the mathematical formalism required to build such an equiangular-spiral bent lightpipe. Furthermore, a comparison of the proposed equiangular-spiral bent lightpipe and a conventional circular bent lightpipe is provided. Numerical verifications are discussed, and experimental explorations with different bent shapes and angles are carried out for comparison. Results show that equiangular-spiral bent lightpipes with different bent angles exhibit a theoretical 100% transmission with more than 76% efficiency when practically propagating, which is much better than conventional circular bent lightpipes. The output irradiance distributions of bent lightpipes with different bent shapes are also investigated. Crown
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U2 - 10.1016/j.optcom.2009.02.012
DO - 10.1016/j.optcom.2009.02.012
M3 - Article
AN - SCOPUS:62849107796
SN - 0030-4018
VL - 282
SP - 1976
EP - 1983
JO - Optics Communications
JF - Optics Communications
IS - 10
ER -