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:
Jun. 14, 2022
Filed:
Jul. 25, 2018
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Neeraj Sharma, Lake Elmo, MN (US);
Guanglei Du, Painted Post, NY (US);
Matthew E. Sousa, Rosemount, MN (US);
Jeremy O. Swanson, Woodbury, MN (US);
Jung-Sheng Wu, Woodbury, MN (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/28 (2006.01); G02B 5/20 (2006.01); G02B 5/02 (2006.01); G02B 5/26 (2006.01);
U.S. Cl.
CPC ...
G02B 5/208 (2013.01); G02B 5/0236 (2013.01); G02B 5/26 (2013.01);
Abstract
Systems including one or both of a light emitter or a light receiver and an optical filter adjacent one or both of the light emitter or the light receive are described. The optical filter includes a wavelength selective scattering layer that scatters near-infrared light less than visible light. The wavelength selective scattering layer includes a plurality of particles. The plurality of particles have an imaginary refractive index less than 10.