US 12,405,410 B2
Nanoparticle light filtering method and apparatus
Steven M. Blair, Salt Lake City, UT (US); Pradeep Kasinadhuni, Hillsboro, OR (US); Steve McDaniel, Provo, UT (US); and Bradley Jay Katz, Salt Lake City, UT (US)
Assigned to University of Utah Research Foundation, Salt Lake City, UT (US)
Filed by University of Utah Research Foundation, Salt Lake City, UT (US)
Filed on Dec. 15, 2020, as Appl. No. 17/122,773.
Application 17/122,773 is a division of application No. 16/251,510, filed on Jan. 18, 2019, granted, now 10,914,877.
Application 16/251,510 is a division of application No. 14/542,564, filed on Nov. 15, 2014, granted, now 10,281,627.
Application 14/542,564 is a continuation in part of application No. 14/542,478, filed on Nov. 14, 2014, granted, now 10,234,608.
Claims priority of provisional application 61/904,861, filed on Nov. 15, 2013.
Prior Publication US 2021/0103080 A1, Apr. 8, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 5/28 (2006.01); G02B 5/00 (2006.01); G02B 5/20 (2006.01); G02C 7/10 (2006.01); B82Y 5/00 (2011.01); B82Y 20/00 (2011.01); B82Y 30/00 (2011.01)
CPC G02B 5/206 (2013.01) [G02B 5/008 (2013.01); G02C 7/104 (2013.01); G02C 7/108 (2013.01); B82Y 5/00 (2013.01); B82Y 20/00 (2013.01); B82Y 30/00 (2013.01); G02C 2202/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical filter, comprising:
an optically transparent substrate;
a host material; and
a plurality of nanoparticles incorporated into the host material and applied to the substrate as a coating, the plurality of nanoparticles having an average major dimension of less than 120 nm,
wherein the substrate, the host material, and the nanoparticles cooperate to provide an attenuation spectrum having a central wavelength of 480 nm, 590 nm, or 620 nm, the attenuation spectrum having a full width half maximum of greater than 50 nm and less than 100 nm about the central wavelength.