Design and Analysis of Modern LED Lens for Collimating Illumination

• Main Authors: Chi-Kang Chen, 陳紀鋼
• Other Authors: Chien-Jong Shih
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/24256849791166878138

碩士 === 淡江大學 === 機械與機電工程學系碩士班 === 102 === This thesis explores the secondary optical lens design and analysis for generating collimating illumination in LED source. In the first phase of this study, a comprehensive paper review provides valuable and technical information. Then three types of lens are selected based on the most recent development with highly optical performances. The lens''s curve is constructed by adopting free-form method in which a series of computing points can be obtained for generating graphical solid model. The optical analysis can be executed by the Light Tools. This thesis proposed four requirements to achieve collimating illumination in modern LED lens, as follows. 1. The process of constructing lens curve is simple and correct. 2. The output optical efficiency must be greater 80% within beam angle. 3. Easy manufacture for reducing the cost. 4. For the volume restriction in practical consideration, the diameter and the axial length of lens may be constrained. According to those four requirements several design improvement in published works are carried out, and discussed. At the final stage, this thesis develops a innovative lens that can achieve 99.28% optical efficiency. Also, when axial length and diameter are predetermined, another development is introduced for comparison and discuss. Both of the new lenses agree four critical requirements in of modern LED lens for collimating illumination.