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請使用永久網址來引用或連結此文件:
http://ir.ncue.edu.tw/ir/handle/987654321/10919
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| 題名: | Free-form lens design for LED indoor illumination |
| 作者: | Huang, Kuang-Lung;Chen, Jin-Jia;Wang, Te-Yuan;Huang, Li-Lin |
| 貢獻者: | 電機工程學系 |
| 關鍵詞: | LED;Free-form;Uniformity |
| 日期: | 2010-10
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| 上傳時間: | 2012-06-04T09:14:57Z
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| 出版者: | SPIE |
| 摘要: | This paper presents a free-form lens design for indoor illumination. The lens consists of a TIR (total internal reflection) surface on the sidewall, a refractive surface on the front side, and a concave surface on the rear side. The TIR surface is decorated with a free-form profile that light rays emitted from the LED with a larger spread angle to the axis will experience a total internal refection and output from the front refractive surface.
While the central part of the front refractive surface has a convex surface that makes light rays closing to the optical axis more evenly distributed. The purpose of the rear concave surface is to let light rays emitted from the LED enter the lens straightforwardly. With this lens light rays from a Lambertian-type LED light source can be redistributed so that a uniform illumination can be achieved. The optical simulation results show that the
measured optical efficiency is 75% while the uniformity is 80% on a target plane of 6-m diameter and at 2.5-m away. |
| 關聯: | SPIE/COS Photonics Asia, Beijing, China, Oct. 18-20, 2010: 7852 |
| 顯示於類別: | [電機工程學系] 會議論文
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文件中的檔案:
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| 2050200116016.pdf | 31Kb | Adobe PDF | 580 | 檢視/開啟 |
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