US 11,874,164 B2
System, apparatus and method for in situ polychromatic measurement of optical properties of topically applied sunscreen
Michael H. Bonitatibus, Glenside, PA (US); and Curtis Cole, New Holland, PA (US)
Assigned to SOLAR LIGHT COMPANY, LLC, Glenside, PA (US)
Filed by Solar Light Company, LLC, Glenside, PA (US)
Filed on Jun. 17, 2022, as Appl. No. 17/807,458.
Application 17/807,458 is a continuation of application No. 17/302,915, filed on May 14, 2021, granted, now 11,397,107.
Application 17/302,915 is a continuation of application No. 16/565,602, filed on Sep. 10, 2019, granted, now 11,022,485, issued on Jun. 1, 2021.
Application 16/565,602 is a continuation of application No. PCT/US2018/031320, filed on May 7, 2018.
Claims priority of provisional application 62/540,643, filed on Aug. 3, 2017.
Claims priority of provisional application 62/510,598, filed on May 24, 2017.
Prior Publication US 2022/0316942 A1, Oct. 6, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01J 1/42 (2006.01); A61K 8/27 (2006.01); A61K 8/35 (2006.01); A61K 8/368 (2006.01); A61K 8/40 (2006.01); A61K 8/41 (2006.01); A61Q 17/04 (2006.01); G01J 1/02 (2006.01); G01J 1/04 (2006.01); G01J 1/08 (2006.01); G01J 1/18 (2006.01); G01J 1/16 (2006.01); G01J 1/44 (2006.01)
CPC G01J 1/429 (2013.01) [A61K 8/27 (2013.01); A61K 8/35 (2013.01); A61K 8/368 (2013.01); A61K 8/40 (2013.01); A61K 8/411 (2013.01); A61Q 17/04 (2013.01); G01J 1/0233 (2013.01); G01J 1/0407 (2013.01); G01J 1/08 (2013.01); G01J 1/18 (2013.01); G01J 2001/1673 (2013.01); G01J 2001/4453 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A diffuse reflectance spectroscopy (DRS) method of measuring the protection of a sunscreen composition, the method comprising:
exposing skin to a known intensity of polychromatic light from a light source configured to produce broad band light;
measuring the amount of remitted light from the skin;
applying sunscreen to the skin;
exposing the skin to which the sunscreen has been applied to the known intensity of emitted polychromatic light;
measuring with a photodetector the amount of polychromatic light remitted from the skin to which the sunscreen has been applied; and
calculating a Protection Factor (PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.