Hamadani Behrang H, Seppala Jonathan, Zarobila Clarence
Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Material Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
OSA Contin. 2020 Aug 15;3(8):2022-2035. doi: 10.1364/OSAC.398260. Epub 2020 Jul 19.
Additive manufacturing methods based on photopolymerization offer a promising potential for fabrication of high quality, highly transparent optical components. One use of these technologies involves fabrication of parts for very specific and narrow applications. In this work, we first performed optical raytracing simulations to model an optimized freeform nonimaging concentrator for a custom-built 12-LED array and then fabricated several waveguide concentrators using 3D printing and characterized their optical characteristics. Our results demonstrate that realizing an irradiance of 17 kW/m or more with an irradiance nonuniformity of better than 2 % over an area approaching 1 cm is realistic and that such an approach can rival intensities achieved with powerful lasers over a similar area. We also discuss an application where eight different types of LEDs were coupled into the waveguides to construct a solar simulator.
基于光聚合的增材制造方法为制造高质量、高透明度的光学元件提供了广阔的前景。这些技术的一种应用涉及为非常特定和狭窄的应用制造部件。在这项工作中，我们首先进行了光线追踪模拟，以对定制的12个发光二极管阵列的优化自由形式非成像聚光器进行建模，然后使用3D打印制造了几个波导聚光器，并对其光学特性进行了表征。我们的结果表明，在接近1平方厘米的区域内实现17千瓦/平方米或更高的辐照度，且辐照度不均匀度优于2%是可行的，并且这种方法可以与在类似区域使用强大激光器所达到的强度相媲美。我们还讨论了一个应用，其中将八种不同类型的发光二极管耦合到波导中以构建一个太阳模拟器。
