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 |
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.
|