Abstract

Natural light illumination system (NLIS) generates increasing research interest because of the recent trend toward green energy. Various crucial optical components used in a NLIS are analyzed, designed, and fabricated to obtain high efficiency. A large amount of light is loss because of the large viewing angle during light transmission. A tapered light pipe (TLP) is used to collimate light viewing angles. In this letter, we combine a TLP and a traditional lens as a new coupler based on Etendue theory. The original efficiency is only 17.54%, but the efficiency reaches more than 70% when the new coupler is applied.

© 2013 Chinese Optics Letters

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  2. 2 S. Zhang, Q. Wang, D. Zhu, R. Li, and C. Liu, Chin. Opt. Lett. 9, 052201 (2011).
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  6. 6 A. J. Whang, Y. Chen, and Y. Teng, J. Display Technol. 5, 94 (2009).
  7. 7 A. J. Whang, Y. Chen, and B. Wu, Solar Energy 83, 1115 (2009).
  8. 8 A. J. Whang, C. Wang, and Y. Chen, Renewable Energy 34, 2280 (2009).
  9. 9 C. Chen, Y. Chen, and A. J. Whang, Proc. SPIE 7422, 74220Z (2009).
  10. 10 Y. Chen and A. J. Whang, Proc. SPIE 7428, 74280E (2009).
  11. 11 S. Yang, Y. Chen, and A. J. Whang, Proc. SPIE 7423, 74230J (2009).
  12. 12 Y. Bai, H. Zhang, J. Wang, N. Chen, J. Yao, T. Huang, X. Zhang, and Z. Yin, Chin. Opt. Lett. 9, 032901 (2011).

2011 (2)

2010 (1)

1 J. Fang, H. Zhang, H. Jia, H. Yin, S. Chang, and S. Qin, Chin. Opt. Let. 8, 478 (2010).

2009 (8)

3 C. Chen, Y. Chen, A. J. Whang, and L. Chen, Proc. SPIE 7423, 74230O (2009).

5 A. J. Whang, P. Li, Y. Chen, and S. Hsieh, J. Display Technol. 5, 104 (2009).

6 A. J. Whang, Y. Chen, and Y. Teng, J. Display Technol. 5, 94 (2009).

7 A. J. Whang, Y. Chen, and B. Wu, Solar Energy 83, 1115 (2009).

8 A. J. Whang, C. Wang, and Y. Chen, Renewable Energy 34, 2280 (2009).

9 C. Chen, Y. Chen, and A. J. Whang, Proc. SPIE 7422, 74220Z (2009).

10 Y. Chen and A. J. Whang, Proc. SPIE 7428, 74280E (2009).

11 S. Yang, Y. Chen, and A. J. Whang, Proc. SPIE 7423, 74230J (2009).

Bai, 12 Y.

Chang, S.

1 J. Fang, H. Zhang, H. Jia, H. Yin, S. Chang, and S. Qin, Chin. Opt. Let. 8, 478 (2010).

Chen, 10 Y.

10 Y. Chen and A. J. Whang, Proc. SPIE 7428, 74280E (2009).

Chen, 3 C.

3 C. Chen, Y. Chen, A. J. Whang, and L. Chen, Proc. SPIE 7423, 74230O (2009).

Chen, 9 C.

9 C. Chen, Y. Chen, and A. J. Whang, Proc. SPIE 7422, 74220Z (2009).

Chen, L.

3 C. Chen, Y. Chen, A. J. Whang, and L. Chen, Proc. SPIE 7423, 74230O (2009).

Chen, N.

Chen, Y.

6 A. J. Whang, Y. Chen, and Y. Teng, J. Display Technol. 5, 94 (2009).

11 S. Yang, Y. Chen, and A. J. Whang, Proc. SPIE 7423, 74230J (2009).

8 A. J. Whang, C. Wang, and Y. Chen, Renewable Energy 34, 2280 (2009).

5 A. J. Whang, P. Li, Y. Chen, and S. Hsieh, J. Display Technol. 5, 104 (2009).

7 A. J. Whang, Y. Chen, and B. Wu, Solar Energy 83, 1115 (2009).

9 C. Chen, Y. Chen, and A. J. Whang, Proc. SPIE 7422, 74220Z (2009).

3 C. Chen, Y. Chen, A. J. Whang, and L. Chen, Proc. SPIE 7423, 74230O (2009).

Fang, 1 J.

1 J. Fang, H. Zhang, H. Jia, H. Yin, S. Chang, and S. Qin, Chin. Opt. Let. 8, 478 (2010).

Hsieh, S.

Huang, T.

Jia, H.

1 J. Fang, H. Zhang, H. Jia, H. Yin, S. Chang, and S. Qin, Chin. Opt. Let. 8, 478 (2010).

Li, P.

Li, R.

Liu, C.

Qin, S.

1 J. Fang, H. Zhang, H. Jia, H. Yin, S. Chang, and S. Qin, Chin. Opt. Let. 8, 478 (2010).

Teng, Y.

Wang, C.

8 A. J. Whang, C. Wang, and Y. Chen, Renewable Energy 34, 2280 (2009).

Wang, J.

Wang, Q.

Whang, 5 A. J.

Whang, 6 A. J.

Whang, 7 A. J.

7 A. J. Whang, Y. Chen, and B. Wu, Solar Energy 83, 1115 (2009).

Whang, 8 A. J.

8 A. J. Whang, C. Wang, and Y. Chen, Renewable Energy 34, 2280 (2009).

Whang, A. J.

9 C. Chen, Y. Chen, and A. J. Whang, Proc. SPIE 7422, 74220Z (2009).

3 C. Chen, Y. Chen, A. J. Whang, and L. Chen, Proc. SPIE 7423, 74230O (2009).

11 S. Yang, Y. Chen, and A. J. Whang, Proc. SPIE 7423, 74230J (2009).

10 Y. Chen and A. J. Whang, Proc. SPIE 7428, 74280E (2009).

Wu, B.

7 A. J. Whang, Y. Chen, and B. Wu, Solar Energy 83, 1115 (2009).

Yang, 11 S.

11 S. Yang, Y. Chen, and A. J. Whang, Proc. SPIE 7423, 74230J (2009).

Yao, J.

Yin, H.

1 J. Fang, H. Zhang, H. Jia, H. Yin, S. Chang, and S. Qin, Chin. Opt. Let. 8, 478 (2010).

Yin, Z.

Zhang, 2 S.

Zhang, H.

12 Y. Bai, H. Zhang, J. Wang, N. Chen, J. Yao, T. Huang, X. Zhang, and Z. Yin, Chin. Opt. Lett. 9, 032901 (2011).

1 J. Fang, H. Zhang, H. Jia, H. Yin, S. Chang, and S. Qin, Chin. Opt. Let. 8, 478 (2010).

Zhang, X.

Zhu, D.

Chin. Opt. Let. (1)

1 J. Fang, H. Zhang, H. Jia, H. Yin, S. Chang, and S. Qin, Chin. Opt. Let. 8, 478 (2010).

Chin. Opt. Lett. (2)

J. Display Technol. (2)

Proc. SPIE (4)

9 C. Chen, Y. Chen, and A. J. Whang, Proc. SPIE 7422, 74220Z (2009).

10 Y. Chen and A. J. Whang, Proc. SPIE 7428, 74280E (2009).

11 S. Yang, Y. Chen, and A. J. Whang, Proc. SPIE 7423, 74230J (2009).

3 C. Chen, Y. Chen, A. J. Whang, and L. Chen, Proc. SPIE 7423, 74230O (2009).

Renewable Energy (1)

8 A. J. Whang, C. Wang, and Y. Chen, Renewable Energy 34, 2280 (2009).

Solar Energy (1)

7 A. J. Whang, Y. Chen, and B. Wu, Solar Energy 83, 1115 (2009).

Other (1)

4 A. J. Whang, C. Lin, N. Ku, and M. Wang, J. Renewable Sustainable Energy 4, 063118 (2012);

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