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:
Sep. 19, 2017
Filed:
Apr. 05, 2013
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Thomas R. Corrigan, St. Paul, MN (US);
Patrick R. Fleming, Lake Elmo, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 14/00 (2006.01); G01J 1/42 (2006.01); F21V 8/00 (2006.01); G01D 5/26 (2006.01);
U.S. Cl.
CPC ...
F21V 14/006 (2013.01); G01D 5/268 (2013.01); G01J 1/4204 (2013.01); G02B 6/0003 (2013.01); G02B 6/0006 (2013.01); G02B 6/0008 (2013.01);
Abstract
Generally, the present disclosure provides for a light duct sensor that can monitor an average light flux through light duct useful for architectural lighting. The present disclosure provides for a system that allows a minimally obtrusive sampling of the light in a duct. It samples a small fraction of a cross sectional area of a light duct that is distributed across potentially the entire cross sectional area, without creating a significant disturbance to the light.