The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2021
Filed:
Oct. 27, 2017
Applicant:
United Kingdom Research and Innovation, Swindon, GB;
Inventors:
Assignee:
UNITED KINGDOM RESEARCH AND INNOVATION, Swindon, GB;
Primary Examiner:
Int. Cl.
CPC ...
G01J 3/44 (2006.01); G01N 21/65 (2006.01); G01N 33/483 (2006.01);
U.S. Cl.
CPC ...
G01N 21/658 (2013.01); G01N 21/65 (2013.01); G01N 33/4833 (2013.01); G01N 2201/068 (2013.01); G01N 2201/126 (2013.01);
Abstract
We disclose methods and apparatus for measuring pH in a sub-surface volume of a diffusely scattering sample. Probe light is directed to an entry region on the sample surface, and collected from a collection region on the sample surface following diffuse scattering within the sample. The collection region is spatially offset from the entry region, so that when one or more Raman spectral features are detected in the collected probe light, a pH of the sub-surface volume can be determined from the spectral features.