Iterative reflector design using a cumulative flux compensation approach
Iterative reflector design using a cumulative flux compensation approach
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DOI：
10.1117/12.871698
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发表时间：
2010-06
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影响因子：
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通讯作者：
W. Cassarly
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文献类型：
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作者：
W. Cassarly
照明设计通常涉及光学表面的剪裁，以提供所需的照度分布。裁剪算法通常会做出简化的假设，比如假设一个点或朗伯源，这会导致实际输出和期望输出之间的差异。通过使用照明软件的虚拟样机功能，模拟可以准确地预测分布，简化假设去除。此外，还可以利用优化算法对裁剪后的曲面进行调整，从而在不简化假设的情况下改善匹配。一种优化方法使用（模拟照度）/（期望照度）比来补偿裁剪算法使用的分布。这种类型的迭代补偿方法在模拟分布和期望分布之间的差异很小时是有效的，但是当模拟和期望的照度分布具有不同的大小或相对于彼此移位时就变得不那么有效了。这些限制可以通过使用模拟和期望的累积通量分布的位置差异来克服，而不是使用模拟和期望的照度分布的比率。
Illumination design often involves the tailoring of optical surfaces to provide a desired illuminance distribution. Tailoring algorithms often make simplifying assumptions, like assuming a point or Lambertian source, and that results in a difference between the actual output and the desired output. By using the virtual prototyping capability of illumination software, simulations can be used to accurately predict distributions with simplifying assumptions removed. In addition, optimization algorithms can be used to adjust the tailored surface so that the match without simplifying assumptions is improved. One optimization approach uses the (simulated illuminance)/(desired illuminance) ratio to compensate the distribution used by the tailoring algorithm. This type of iterative compensation approach can be effective when the difference between simulated and desired distributions is small, but becomes less effective when the simulated and desired illuminance distributions have different sizes or are shifted with respect to one another. These limitations can be overcome by using the difference in position of the simulated and desired cumulative flux distributions instead of the ratio of the simulated and desired illuminance distributions.