公开(公告)号：US09036153B1

公开(公告)日：2015-05-19

申请号：US14015569

申请日：2013-08-30

Applicant: Google Inc.

Inventor： Anurag Gupta ,  Amber M. Luttmann ,  Michael R. Sears ,  Evan M. Richards

IPC: G01N21/55 ,  G01N21/00

CPC classification number: G01N21/55

Abstract: An apparatus for testing the reflectivity of a material under test includes a rotating carriage, a light source, and a light detector. At least two sample units are mountable to the rotating carriage. Each sample unit includes a planar surface disposed under a portion of a hemispherical surface. The light source is mounted on a pivoting boom and generates light. The light detector is mounted to measure optical power of the light emitted from the light source and reflected from a selected one of the at least two sample units. The pivoting boom and the rotating carriage rotate through different angular positions to obtain reflectance signatures as a function of incident angles for the at least two sample units.

Abstract translation: 用于测试被测材料的反射率的装置包括旋转托架，光源和光检测器。 至少两个样品单元可安装到旋转的托架上。 每个样品单元包括设置在半球形表面的一部分下面的平面。 光源安装在枢转吊臂上并产生光。 安装光检测器以测量从光源发射并从所述至少两个采样单元中的所选一个反射的光的光功率。 枢转起重臂和旋转托架通过不同的角位置旋转，以获得作为至少两个采样单元的入射角的函数的反射特征。