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Optical transmittance of high-efficiency cavity with photon recycling

机译:带有光子回收的高效腔的透光率

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摘要

A planar-exit lighting surface is not only used in the luminaires but also useful in the display backlights and other illumination systems. Most planar-exit lighting surfaces are made by edge-lit with line light source or 1-D LED array. If it is not edge-lit type, the light source can be two-dimensional, but a cavity is required. In this paper, a high-efficiency cavity providing extremely high energy transmittance with photon recycling is reported and demonstrated. The cavity contains a diffuser and the high reflectivity surfaces. The optical efficiency of the cavity is calculated by a formula with considering photon recycling. Furthermore, various kinds of diffusers are applied to change the optical transmittance as well as the light pattern. When the reflectivity of the inner wall of the lighting cavity is about 96 %, the optical efficiency of the cavity is higher than 90 % with several diffusers. The experimental measurement as well as the calculation is demonstrated in the paper.
机译:平面退出的照明表面不仅用于照明设备,而且在显示器背光和其他照明系统中很有用。大多数平面出口照明表面都是通过线光源或一维LED阵列边缘照明制成的。如果不是边缘照明型,则光源可以是二维的,但是需要腔体。在本文中,已报道并证明了一种高效腔体,该腔体通过光子循环提供了极高的能量透射率。空腔包含一个漫射器和高反射率的表面。通过考虑光子循环的公式,可以计算出腔体的光学效率。此外,应用各种扩散器以改变光透射率以及光图案。当照明腔的内壁的反射率约为96%时,在使用多个漫射体的情况下,腔的光学效率高于90%。本文演示了实验测量和计算。

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