公开(公告)号：US20090273727A1

公开(公告)日：2009-11-05

申请号：US11720712

申请日：2005-12-02

申请人： Shigeo Kubota ,  Junichi Osako ,  Satoshi Tomioko ,  Mitsunori Ueda ,  Tetsuyuki Yoshida ,  Naoji Nada

发明人： Shigeo Kubota ,  Junichi Osako ,  Satoshi Tomioko ,  Mitsunori Ueda ,  Tetsuyuki Yoshida ,  Naoji Nada

IPC分类号： G02F1/13357 ,  F21V7/06 ,  F21V13/04 ,  F21K7/00

CPC分类号： G02B17/0856 ,  G02B5/265 ,  G02F1/133603 ,  H01L33/58 ,  H01L2224/16225 ,  H01L2224/48091 ,  H01L2224/73265 ,  H01L2924/13091 ,  H01L2924/00014 ,  H01L2924/00

摘要： There is provided a lens formed from a circular bottom face (11), lateral face (14) and top face (15) and having a surface light source (13) of a finite size disposed at the center of the bottom face (11). The top face (15) is an aspheric surface rotational symmetric with respect to a z-axis and which totally reflects a part of a component, whose polar angle is smaller than a polar angle Θ0 at the intersection between the lateral face (14) and top face (15), of light emitted from the surface light source (13). The lateral face (14) is an aspheric surface rotational symmetric with respect to the z-axis and pervious to a component, whose polar angle is larger than the polar angle Θ0, and component, totally reflected at the top face (15), of the light emitted from the surface light source (13). A function r=fS(z) where z is a variable representing the lateral face (14) increases monotonously as the variable z decreases in a closed zone defined by 0≦z≦z1 (z-coordinate of an intersection between the lateral face (14) and top face (15)), and has at least one point where a absolute value |d2r/dz2| is maximum in the closed zone.

摘要翻译： 提供了由圆形底面（11），侧面（14）和顶面（15）形成并具有设置在底面（11）的中心处的有限尺寸的表面光源（13）的透镜， 。 顶面（15）是相对于z轴旋转对称的非球面，其全部反射部分的一部分，其极角小于侧面（14）与侧面（14）的交点处的极角θta 从表面光源（13）发射的光的顶面（15）。 侧面（14）是相对于z轴旋转对称的非球面，并且可以透视其极角大于极角（θ）的部分，并且在顶面（15）处全反射的分量 从表面光源（13）发射的光。 函数r = fS（z）其中z是表示横向面（14）的变量随着变量z在由0 <= z <= z1定义的关闭区域中减小而单调增加（横向 面（14）和顶面（15）），并且具有至少一个绝对值| d2r / dz2 | 在封闭区域最大。