Bireflective lens element
    5.
    发明授权
    Bireflective lens element 有权
    双反射透镜元件

    公开(公告)号:US6097549A

    公开(公告)日:2000-08-01

    申请号:US133178

    申请日:1998-08-12

    摘要: A bireflective lens element comprising a light input surface and a direct transmitting area communicating with the light input surface. A light source is disposed adjacent to the light input surface for projecting light into the lens element to create a light emitting assembly. A first portion of input light is directed through the lens elements in a first predetermined pattern. A primary and a secondary reflecting area is between the light input surface and an illumination surface surrounding the direct light transmitting area. A second portion of input light is redirected through the lens element to the illumination surface in a second predetermined pattern. Specifically, the secondary reflective area has a plurality of extracting facets extending inwardly into the secondary reflective area for intercepting light from the primary reflective area. The first predetermined pattern combines with the second predetermined pattern to output light from the illumination surface in a substantially uniform pattern covering the broad area of the lens element.

    摘要翻译: 一种双反射透镜元件,包括光输入表面和与光输入表面连通的直接透射区域。 光源邻近光输入表面设置,用于将光投射到透镜元件中以产生发光组件。 输入光的第一部分以第一预定图案被引导穿过透镜元件。 初级和次级反射区域在光输入表面和围绕直接透光区域的照明表面之间。 输入光的第二部分以第二预定图案被重定向穿过透镜元件到照明表面。 具体而言,二次反射区域具有向内延伸到次级反射区域中的多个提取面,用于截取来自主反射区域的光。 第一预定图案与第二预定图案组合,以覆盖透镜元件的宽阔区域的基本上均匀的图案输出来自照明表面的光。