Design of LED Lens with Asymmetrical Irradiance Distribution and Application

• Main Authors: Meng-Nien Hsu, 許孟年
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/52874987775269839994

碩士 === 國立臺灣科技大學 === 電機工程系 === 103 === The thesis focused on the design of secondary optical lens of asymmetrical distribution. The idea of zonal flux analysis provides us a fast and efficient way to analyzing the luminous flux of the sources and our targets while using the proposed secondary optical TIR lens design method to develop the luminaires. By using 3D model software SolidWorks we can build up our lens and verifying our design through ray tracing software TracePro. A TIR lens with symmetrical distribution was given in the thesis to prove the feasibility of the proposed methods. Moreover, due to the needs of designs to improve the lighting environments of current lecture halls, we designed two luminaires with asymmetrical distribution for the blackboard and the desks. A lecture hall was further built within lighting design software DIALux to show the results of the luminaires. To guarantee the proposed luminaires were ideal, an evaluation system was set up and two control groups were compared, with one using conventional T5 luminaires and the other using a LED blackboard luminaire with asymmetrical distribution and a LED desk luminaire with symmetrical distribution. The designed evaluation system mainly focused on the feeling of human so as to take uniformity and UGR more seriously. The results showed that the proposed luminaires provide better lighting environment for the lecture hall.