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    • 6. 发明授权
    • Ring-lens system for efficient beam formation
    • 环形透镜系统,用于有效的光束形成
    • US5926320A
    • 1999-07-20
    • US864840
    • 1997-05-29
    • William A. Parkyn, Jr.John M. Popovich
    • William A. Parkyn, Jr.John M. Popovich
    • F21V7/00G02B27/30G02B27/10
    • F21S48/1329
    • This invention consists of a highly efficient beamforming system of ring-lens elements that may be used in automobile headlights, flashlights, and for other lighting products. The lens captures most of the light from an omnidirectional source, so that light from a solid angular cone of nearly 4 steradians is utilized with little or no reliance on a metallic reflector. The surfaces of the lens elements may be formed integrally with a hot light source, such as an incandescent lamp, so that the filament of the light source is inserted directly into an internal cavity of the lens. The lens may also be formed in optical contact with a cold light source, such as a light emitting diode, to reduce Fresnel losses and increase light utilization efficiency. An integrated system of optical surfaces collects light, including downwardly-directed light, from the source to further increase light utilization to a high efficiency of 75-90%. The number of surfaces on the lens are at least three, and one or more of these surfaces use total internal reflection (TIR) to redirect the light. The lens may be formed in either a two piece construction or a one piece construction having an internal air gap. The lens may be made from silicone or a high temperature glass having a low thermal expansion coefficient.
    • 本发明包括可用于汽车前灯,手电筒和其他照明产品的环形透镜元件的高效波束成形系统。 透镜捕获来自全向光源的大部分光,使得来自具有接近4个立体角的固体角锥的光被很少或根本不依赖于金属反射器。 透镜元件的表面可以与诸如白炽灯的热光源一体地形成,使得光源的灯丝被直接插入到透镜的内部空腔中。 透镜也可以形成为与冷光源(例如发光二极管)光学接触,以减少菲涅耳损耗并提高光利用效率。 光学表面的集成系统从源收集光,包括向下指向的光,以进一步将光利用率提高到75-90%的高效率。 透镜上的表面数量至少为三个,并且这些表面中的一个或多个使用全内反射(TIR)来重定向光。 透镜可以形成为具有内部气隙的两件式结构或单件结构。 透镜可以由具有低热膨胀系数的硅树脂或高温玻璃制成。
    • 7. 发明授权
    • Illuminating lens designed by extrinsic differential geometry
    • 通过外在差分几何设计的照明镜头
    • US5924788A
    • 1999-07-20
    • US935774
    • 1997-09-23
    • William A. Parkyn, Jr.
    • William A. Parkyn, Jr.
    • F21K99/00F21V5/04F21V7/00G02B27/00
    • G02B27/0012F21V5/04G02B3/02F21V7/0091F21Y2101/00Y10S362/80
    • An illumination system with a prescribed output pattern comprising a light source and an optical lens redirecting the light of the source into an output beam, the lens with multiple surfaces at least one of which has a shape that is not a surface of revolution, the shape generated by the following method: on the Gaussian sphere of directions of the output beam exiting the surface of the lens, in accordance with the prescribed output pattern, establish a first grid of equal-flux zones of solid angle; on a portion of the Gaussian sphere of directions of the light emitted from the source into the interior of the lens, establish a second grid with the same number of equal-flux zones of solid angles as the first grid, with a coordinate-system topology congruent with that of the first grid, such that the zones of the second grid are in one-to-one correspondence with the zones of the first grid, with the flux of each zone in proportion to its corresponding zone of the first grid, according to the local transmittance of the lens, with either of both of the grids being rotationally non-symmetric; by this correspondence define a flux-redistributing directional mapping function from the first Gaussian sphere to the second Gaussian sphere, whereby any light ray from the source can be assigned a direction in the output beam, according to the zone of the second grid into which the ray falls, so that the redirected ray falls in the corresponding zone of the first grid; establish one or more lens surfaces to redirect the source rays to the output rays, using the vector laws of refraction or reflection to derive a distribution of normal vectors for each surface; from the distributions of normal vectors, successively generate each lens surface, beginning with that nearest source and going outwards.
    • 具有规定输出图案的照明系统包括光源和将光源的光重定向到输出光束的光学透镜,该透镜具有多个表面,其中至少一个具有不是旋转表面的形状,该形状 通过以下方法产生:在离开透镜表面的输出光束的方向的高斯球体上,根据规定的输出图案,建立具有立体角的等通量区域的第一格栅; 在从源极发射到透镜内部的光的方向的高斯球体的一部分上,建立具有与第一格栅相同数量的具有相同数量的立体角的等通量区域的第二格栅,具有坐标系拓扑 与第一格栅的区域一致,使得第二格栅的区域与第一格栅的区域一一对应,每个区域的通量与第一格栅的相应区域成比例,根据 对于透镜的局部透射率,两个栅格中的任一个是旋转非对称的; 通过该对应关系确定从第一高斯球到第二高斯球的磁通重分布方向映射函数,由此可以根据第二格子的区域将来自源的任何光线分配给输出光束中的方向,其中 光线落下,使得重定向的光线落在第一格栅的相应区域中; 建立一个或多个透镜表面以使源光线重定向到输出光线,使用矢量的折射或反射定律导出每个表面的法向矢量的分布; 从法向量的分布中,依次产生每个透镜表面,从最近的源开始并向外移动。