Patent · US Active

Instrument for reflectivity measurement

US9036153B1 · kind B1 · utility

3Cited by

19References

20Claims

0Family size

Assignee

Google LLC · US

Inventors

Anurag Gupta · Corvallis, US
Amber M. Luttmann · Fremont, US
Michael Sears · Quincy, US
Evan M. Richards · Fremont, US

Key dates

Filing date	Aug 30, 2013
Grant date	May 19, 2015
Priority date	—
Expiry date	Aug 30, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG01N21/55
WIPO fieldMeasurement
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.