US 11,754,710 B2
Measurement device and method of operating therefor
Tero Heinonen, San Francisco, CA (US)
Assigned to Ai4 International Oy, Helsinki (FI)
Filed by AI4 International Oy, Helsinki (FI)
Filed on Oct. 18, 2019, as Appl. No. 16/656,910.
Prior Publication US 2021/0116562 A1, Apr. 22, 2021
Int. Cl. G01S 7/4865 (2020.01); G01S 7/4915 (2020.01); G01S 17/08 (2006.01); G01S 17/931 (2020.01); G01S 7/499 (2006.01)
CPC G01S 17/08 (2013.01) [G01S 7/4865 (2013.01); G01S 7/4915 (2013.01); G01S 17/931 (2020.01); G01S 7/499 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of operating a measurement device, the method comprising:
performing a first measurement, by emitting a first beam of light having a first wavelength, at a first instant of time;
introducing a first passive period of time after the first measurement;
performing a second measurement, by emitting a second beam of light having a second wavelength, at a second instant of time, wherein the second wavelength is different than the first wavelength and the second instant of time is after the first passive period of time; and
introducing a second passive period of time after the second instant of time, wherein the second passive period of time is different from the first passive period of time;
detecting noise signals during one or more of the first passive period of time and the second passive period of time;
recording a count of photons in the detected noise signals;
determining an intensity of the noise signals based on the count of photons; and
adjusting intensities of the beam of lights emitted during the first measurement and the second measurement based on the intensity of the noise signals.