ABSTRACT 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-étendue 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.

中文翻译：

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用于具有规定强度和低峰值亮度的照明应用的分段透镜的高效设计方法

摘要 目前在一般照明应用中使用的发光二极管 (LED) 从小型封装中提供高光通量，这会导致高峰值亮度和眩光。漫射器的使用可以降低峰值亮度，但这些组件无法像 LED 等低光谱光源的非成像透镜那样精确控制所产生的强度模式。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，该方法可降低峰值亮度，但仍可对所得强度分布进行出色控制。透镜的每个部分都在某个角度范围内散布光，但是每个透镜部分的不同贡献共同导致所需的目标强度分布。