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arXiv 1104.0096physics.optics
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腔对光源集光率的影响

The effects of cavity on the etendue of a light source

Ui-Hyung Lee, Young-Gu Ju

摘要:

模拟结果表明,在不改变光源发射能量和光源尺寸的情况下,圆形光源周围的圆柱形腔可以减小发散角。该结果可以提供一种通过利用无损散射表面扰乱腔内的光线来减小光源的集光率的方式。实验表明,面源周围的金属腔减小了发散角。然而,金属表面也吸收相当大部分的光能。侧壁表面的朗伯性质将射线的方向改变为水平方向。它增加了腔内的反射次数,并放大了单次反射时的少量吸收。腔对光源的集光率的影响可以有助于在各种照明应用中提供更多的设计灵活性。

英文摘要:

The simulation proposes that the cylindrical cavity around a circular light source can decreases the divergence angle without changing the emission energy and source size. This result can provide a way to reduce the etendue of the light source by scrambling the rays inside the cavity with a lossless scattering surface. The experiment demonstrates that the metallic cavity around the surface source reduces the divergence angle. However, the metallic surface also absorbs quite a large portion of the light energy. The Lambertian nature of the sidewall surface changes the directions of the rays into horizontal directions. It increases the number of reflection inside the cavity and amplifies the small amount of absorption at a single reflection. The effect of the cavity on the etendue of the light source can contributes to providing more design flexibility in various lighting applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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