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    • 84. 发明授权
    • Zoom lens system for LED-based spotlight
    • 用于LED基聚光灯的变焦镜头系统
    • US08641230B1
    • 2014-02-04
    • US13657731
    • 2012-10-22
    • LedEngin, Inc.
    • Wu Jiang
    • F21V13/04
    • F21V14/06F21V5/004F21V5/008F21V7/0091F21W2131/406F21Y2115/10G02B19/0028G02B19/0061
    • Zoom lens systems for LED-based spotlights include a base lens and a disk lens. The base lens can be a TIR lens with convex microlenses on a front surface. The disk lens can be generally planar. A rear surface of the disk lens can have concave microlenses complementary to the microlenses on the front surface of the base lens. A front surface of the disk lens can have convex microlenses with a different geometry from the microlenses on the front surface of the base lens. The disk lens can be movable relative to the base lens from a narrow-angle position in which a rear surface of the disk lens is in contact with a front surface of the base lens to a wide-angle position in which the rear surface of the disk lens is separated from the front surface of the base lens.
    • 用于基于LED的射灯的变焦镜头系统包括基座镜头和盘片镜头。 底座透镜可以是在前表面上具有凸出的微透镜的TIR透镜。 盘式透镜可以是大致平面的。 盘片透镜的后表面可以具有与基底镜片前表面上的微透镜互补的凹形微透镜。 盘片透镜的前表面可以具有与基底镜片前表面上的微透镜不同的几何形状的凸形微透镜。 盘片透镜可以从其中盘片透镜的后表面与基镜的前表面接触的窄角位置相对于基座镜头移动到广角位置,在该广角位置, 圆盘透镜与基座镜头的前表面分离。