US 11,850,118 B2
Determining a presence of auto-fluorescent biological substances through an article
Brian Schiffer, San Francisco, CA (US)
Assigned to Verily Life Sciences LLC, South San Francisco, CA (US)
Filed by Verily Life Sciences LLC, South San Francisco, CA (US)
Filed on Jun. 17, 2022, as Appl. No. 17/843,186.
Application 17/843,186 is a continuation of application No. 16/542,898, filed on Aug. 16, 2019, granted, now 11,389,339.
Prior Publication US 2022/0323264 A1, Oct. 13, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 13/42 (2006.01); G01V 8/12 (2006.01); G01N 21/64 (2006.01); A61F 13/84 (2006.01)
CPC A61F 13/42 (2013.01) [G01N 21/64 (2013.01); G01N 21/6428 (2013.01); G01N 21/6486 (2013.01); G01V 8/12 (2013.01); A61F 2013/8491 (2013.01); G01N 2021/6421 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
causing, at a first time, a first light source to transmit light that includes a first peak wavelength that corresponds to a first excitation wavelength of a substance, the substance comprising multiple excitation wavelengths;
obtaining a first measurement of light intensity within a first range of emission wavelengths of the substance;
causing, at a second time, a second light source to transmit light that includes a second peak wavelength that corresponds to a second excitation wavelength of the substance;
obtaining a second measurement of light intensity within a second range of emission wavelengths; and
responsive to comparing a ratio of the first measurement of light intensity and the second measurement of light intensity against a threshold, identifying a presence of the substance.