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. 29, 2026
Filed:
Jun. 17, 2022
3m Innovative Properties Company, St. Paul, MN (US);
Matthew E. Sousa, Rosemount, MN (US);
Jason S. Petaja, Hudson, WI (US);
Anthony M. Renstrom, Forest Lake, MN (US);
William B. Kolb, Stillwater, MN (US);
Robert D. Taylor, Stacy, MN (US);
Benjamin J. Forsythe, Stillwater, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An optical film includes an optically diffusive layer including a plurality of nanoparticles dispersed between and across opposing first and second major surfaces thereof. The plurality of nanoparticles has a nanoparticle size distribution including distinct first and second peaks at respective nanoparticle sizes d1 and d2, wherein 1.5≤d2/d1≤10. The optically diffusive layer includes a polymeric material bonding the nanoparticles to each other. For a substantially collimated substantially normally incident light, the optical film has, in a visible wavelength, an average specular transmittance VTs and an average total transmittance VTt, and in an infrared wavelength range, an average total transmittance ITt and an average specular transmittance ITs, wherein 0.3≤(VTs/VTt)≤0.7, (VTs/ITs)≤0.25, and (ITs/ITt)≥0.7.