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首页> 外文会议>Conference on Light-Emitting Diode Materials and Devices; 20071112-14; Beijing(CN) >Coupling of light from an LED into a very thin light guide by a coupling lens
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Coupling of light from an LED into a very thin light guide by a coupling lens

机译：通过耦合透镜将来自LED的光耦合到非常薄的光导中

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摘要

A LED light coupler is designed with rigorous geometrical optics analysis for coupling light from a mini side white LED of 0.6mm height, the thinnest commercially available LED, into to a very thin (~0.3mm) light guide on the edge side. The ultra thin thickness of the light guide limits the application of conventional LED coupling due to short coupling efficiency. Furthermore the polychromatic spectral band of the LED excludes the use of diffractive gratings which were proposed for a nearly monochromatic LED coupling to a thin light guide. The coupler is essentially comprised of a collimator and a concentrator lens. The coupler first collimates the light from the LED and then concentrates the collimated light into the light guide. The exit surface of the coupler is additionally textured to have micro patterns in order to control the radiance profile. The coupling efficiency is improved from 50%～60% without any couplers to 86% with the proposed LED coupler.
机译：LED光耦合器经过严格的几何光学分析，可将0.6mm高度的微型侧面白色LED（最薄的市售LED）中的光耦合到边缘侧非常薄（〜0.3mm）的光导中。由于短的耦合效率，光导的超薄厚度限制了常规LED耦合的应用。此外，LED的多色光谱带不使用衍射光栅，该衍射光栅是为耦合到薄光导的近单色LED提出的。耦合器主要由准直仪和聚光镜组成。耦合器首先将来自LED的光准直，然后将准直的光会聚到光导中。耦合器的出口表面还需要纹理化以具有微图案，以控制辐射轮廓。所提出的LED耦合器将耦合效率从无耦合器的50％〜60％提高到86％。

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