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. 21, 2021
Filed:
Oct. 26, 2017
Applicant:
Weld Camera, Llc, Saugus, CA (US);
Inventor:
Gary James Thompson, Saugus, CA (US);
Assignee:
WELD CAMERA, LLC, Saugus, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/07 (2006.01); G02B 5/23 (2006.01); B23K 3/047 (2006.01); H01L 27/146 (2006.01); H04N 5/225 (2006.01);
U.S. Cl.
CPC ...
G02B 5/23 (2013.01); B23K 3/047 (2013.01); H01L 27/14625 (2013.01); H04N 5/2254 (2013.01);
Abstract
A liquid photochromic filter for attenuating an image is disclosed. The liquid photochromic filter includes a photochromic dye in a liquid solution that is contained in a cavity defined by a housing with two optical windows. The liquid photochromic filter may be used in imaging system for sensing light in an area of high optical contrast. In some implementations, the imaging system is for monitoring a welding operation, whereby the liquid photochromic filter is used to reduce the intensity of the light observed from the welding arc.