US 12,048,773 B2
Self-sanitizing waveguiding surfaces
Adam F. Gross, Santa Monica, CA (US); Kevin Geary, Santa Monica, CA (US); and Shanying Cui, Calabasas, CA (US)
Assigned to HRL LABORATORIES, LLC, Malibu, CA (US)
Filed by HRL LABORATORIES, LLC, Malibu, CA (US)
Filed on Sep. 11, 2023, as Appl. No. 18/464,884.
Application 18/464,884 is a division of application No. 17/036,474, filed on Sep. 29, 2020, granted, now 11,793,897.
Application 17/036,474 is a division of application No. 15/870,082, filed on Jan. 12, 2018, granted, now 10,821,198, issued on Nov. 3, 2020.
Claims priority of provisional application 62/461,415, filed on Feb. 21, 2017.
Prior Publication US 2023/0414809 A1, Dec. 28, 2023
Int. Cl. A61L 2/10 (2006.01); A61L 2/238 (2006.01); A61L 2/26 (2006.01); F21V 8/00 (2006.01); G02B 5/00 (2006.01); G02B 6/10 (2006.01)
CPC A61L 2/10 (2013.01) [A61L 2/238 (2013.01); A61L 2/26 (2013.01); G02B 5/008 (2013.01); G02B 6/0023 (2013.01); G02B 6/0065 (2013.01); G02B 6/102 (2013.01); A61L 2202/11 (2013.01); G02B 6/003 (2013.01); G02B 6/0043 (2013.01); G02B 6/0066 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of fabricating a self-sanitizing surface structure, the self-sanitizing surface structure comprising a waveguide; the waveguide comprising: a propagating layer having a first transverse side and a second transverse side opposite the first transverse side, the first transverse side being exposed to air and configured to selectively refract light; and a support layer in direct contact with the second transverse side of the propagating layer, the waveguide being configured to selectively refract about 0.01% to about 25% of the flux of an ultraviolet (UV) light injected into the propagating layer, the selective refraction occurring when a residue is on the first transverse side and at an interface between the first transverse side and the residue, the method comprising:
attaching optical mirrors to a substrate, the optical mirrors having a height larger than that of the substrate;
forming the propagating layer by applying an ultraviolet (UV)-transparent pre-polymer coating between the optical mirrors and curing the UV-transparent pre-polymer coating;
attaching the support layer to the substrate;
attaching the propagating layer to the support layer; and
coupling a UV light source to an injection end of the propagating layer.