PMMA Lens Design and Manufacturing for Indoor Uniform Illumination
- 10.2991/ame-16.2016.86How to use a DOI?
- PMMA lens, Illumination, Manufacturing, CNC
Based on a new ray mapping method in (u, v) coordinate system, we have designed a polymethyl methacrylate(PMMA) lens for indoor uniform illumination. The lighting area is 18m ×18m and has a distance of 8m to the light source. We have calculated the surface curves and lofted them into surface, then the lens three-dimensional model is constructed, the PMMA lens is with a refractive index of 1.4935, the size of the lens is 38mm × 38mm × 18mm. Since the new ray mapping method applies error control to constructing the lens surface, the surface is discontinuous and consists of 20 surface patches. With the lens model being inserted into the optical simulation software, we can process the lighting simulation by a LED source with 1 million rays. Simulation results show the minimum illuminance on the lighting area is 2.2lux and the average illuminance is about 2.6lux. After constructing arrays with 9 designed lenses, the simulation results show the minimum illuminance on the lighting area is about 21lux, which meets the requirement of indoor illumination. In order to prove the lens model can apply to the indoor lighting situation, we have manufactured a lens with PMMA on precision CNC machine tool. With the manufactured lens, we complete the lighting experiment and obtain the lighting pattern. But we have found dark fringes exist on the lighting pattern and the illuminance around two vertexes are not expected results, that is because the compact discontinuous part of the lens can't be manufactured precisely on precision CNC machine tool, and this bring manufacturing errors to the lens.
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Dian-Hong Liu AU - Xiao-Hui Zhang AU - Chen Chen PY - 2016/06 DA - 2016/06 TI - PMMA Lens Design and Manufacturing for Indoor Uniform Illumination BT - Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016) PB - Atlantis Press SP - 523 EP - 526 SN - 2352-5401 UR - https://doi.org/10.2991/ame-16.2016.86 DO - 10.2991/ame-16.2016.86 ID - Liu2016/06 ER -