公开(公告)号：US20050045896A1

公开(公告)日：2005-03-03

申请号：US10649094

申请日：2003-08-26

申请人： Kee Goh ,  Yee Chin ,  Boon Lee ,  Chen Tan

发明人： Kee Goh ,  Yee Chin ,  Boon Lee ,  Chen Tan

IPC分类号： H01L21/00 ,  H01L33/58 ,  H01L33/00

CPC分类号： H01L33/58

摘要： The light-emitting device includes a light source and a gradient index (GRIN) element. The GRIN element has a cylindrical refractive index profile in which the refractive index varies radially and is substantially constant axially. The GRIN element includes a first end surface opposite a second end surface and is characterized by a length-to-pitch ratio. The GRIN element is arranged with the first end surface adjacent the light source to receive light from the light source, and emits the light from the second end surface in a radiation pattern dependent on the length-to-pitch ratio. Since the radiation pattern depends on the length-to-pitch ratio of the GRIN element, LEDs with different radiation patterns can be made simply by using GRIN elements of appropriate lengths.

摘要翻译： 发光装置包括光源和梯度折射率（GRIN）元件。 GRIN元件具有圆柱形折射率分布，其中折射率径向变化并且轴向基本上恒定。 GRIN元件包括与第二端面相对的第一端面，其特征在于长度与间距比。 GRIN元件布置成具有邻近光源的第一端表面以接收来自光源的光，并且以取决于长度与间距比的辐射图案从第二端表面发射光。 由于辐射图取决于GRIN元件的长度间距比，所以可以通过使用适当长度的GRIN元件简单地制作具有不同辐射图案的LED。