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Efficient Design Method of Segmented Lenses for Lighting Applications with Prescribed Intensity and Low Peak Luminance

机译:规定强度和低峰值亮度照明应用分段镜片的高效设计方法

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摘要

Light emitting diodes (LEDs) that are used today in general lighting applications provide high luminous flux from small packages, which can result in high peak luminance and glare. The use of diffusors allows reducing peak luminances, but these components do not allow accurate control over the resulting intensity pattern as is possible with nonimaging lenses for low-etendue sources such as LEDs. In this article, a new design method is presented to create a rotational or transverse symmetric segmented lens that results in a reduced peak luminance but still allows excellent control over the resulting intensity distribution. Each segment of the lens spreads out the light in a certain angular range, but the different contributions of each lens segment result together in the desired target intensity distribution. The design method is based on the iterative optimization of a linear transformation of a source intensity distribution into a target intensity distribution, starting from a transformation that yields maximal light beam spreading.
机译:今天在一般照明应用中使用的发光二极管(LED)提供的小封装提供高光通量,这可能导致高峰亮度和眩光。扩散器的使用允许减少峰值亮度,但是这些部件不允许对所得到的强度图案进行精确控制,因为对于诸如LED的低电源源的非分析镜头,可以如此。在本文中,提出了一种新的设计方法来创建旋转或横向对称分段透镜,导致降低的峰值亮度,但仍然允许优异地控制产生的强度分布。镜片的每个段在一定的角度范围内扩散出光,但是每个透镜片段的不同贡献在所需的目标强度分布中呈现在一起。设计方法基于从产生最大光束扩展的变换开始的目标强度分布的源强度分布的线性变换的迭代优化。

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