公开(公告)号：US20050253046A1

公开(公告)日：2005-11-17

申请号：US10848707

申请日：2004-05-14

Applicant: Thomas Bulpitt

Inventor： Thomas Bulpitt

IPC: G01J1/06 ,  G01J1/42 ,  H01J3/14

CPC classification number: G01J1/06 ,  G01J1/0444 ,  G01J1/0462 ,  G01J1/42 ,  G01J2001/4252

Abstract: A device for measuring the output of an LED with a detector under different distance conditions without requiring the movement of either the LED or the detector. An exemplary embodiment of the present invention implements the testing conditions specified in CIE 127 allowing the determination of Averaged LED Intensity at the specified distances of 100 mm and 316 mm while keeping the physical distance between the LED and the detector fixed at the shorter distance of 100 mm. The exemplary embodiment comprises an optical element that can be selectively inserted into the optical path between the LED and the detector to make the separation appear to be the longer of the two distances. The optical element comprises a lens assembly and a detector aperture that creates a virtual image of the detector aperture at the longer of the two distances. The detector aperture is dimensioned so that the virtual image of the detector aperture has the area required by the standard.

Abstract translation: 用于在不同距离条件下用检测器测量LED的输出的装置，而不需要LED或检测器的移动。 本发明的示例性实施例实现CIE 127中规定的测试条件，允许在100mm和316mm的指定距离处确定平均LED强度，同时保持LED和检测器之间的物理距离固定在较短距离100 mm。 该示例性实施例包括可以选择性地插入到LED和检测器之间的光路中的光学元件，以使分离看起来是两个距离中的更长的距离。 光学元件包括透镜组件和检测器孔径，其在两个距离的较长时间产生检测器孔径的虚拟图像。 检测器孔径的尺寸使得检测器孔的虚像具有标准要求的面积。