کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11023629 | 1701262 | 2019 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Design of high-efficient TIR lens for tailored illumination with high contrast
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In order to achieve a desired irradiance distribution on target plane, we proposed an approach for the design of an asymmetrical TIR lens generating special facula in an area with a large height-diameter ratio, which can reach 1: 12. A mathematical model of a total internal reflection surface based on single LED chip and desired irradiance distribution of the target plane is established, by solving the equations, several 2-D curves are obtained, then combined these 2-D curves into asymmetrical surface by using modeling tools. The results show that this method can be used to produce different irradiance distribution, including polygon, ellipses, pentagram, heart-shaped and lots of different irregular shapes. In particular, the normal vector of luminous surface and target plane are equal, the contrast of boundary region can reach 10000:1 and its efficiency can reach more than 93%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 111, April 2019, Pages 240-248
Journal: Optics & Laser Technology - Volume 111, April 2019, Pages 240-248
نویسندگان
Xiang Sun, Zhen-Min Zhu, Jie Yuan, Bo Peng,