US 12,226,187 B2
Estimation of source-detector separation in an optical measurement system
Ryan Field, Culver City, CA (US); Katherine Perdue, Los Angeles, CA (US); and Hamid Dehghani, Birmingham (GB)
Assigned to HI LLC, Culver City, CA (US)
Filed by HI LLC, Los Angeles, CA (US)
Filed on Feb. 27, 2024, as Appl. No. 18/588,846.
Application 18/588,846 is a continuation of application No. 17/176,448, filed on Feb. 16, 2021, granted, now 11,950,879.
Claims priority of provisional application 63/071,473, filed on Aug. 28, 2020.
Claims priority of provisional application 62/992,543, filed on Mar. 20, 2020.
Claims priority of provisional application 62/979,866, filed on Feb. 21, 2020.
Prior Publication US 2024/0197185 A1, Jun. 20, 2024
Int. Cl. A61B 5/00 (2006.01); G01B 11/14 (2006.01)
CPC A61B 5/0082 (2013.01) [A61B 5/4064 (2013.01); A61B 5/6803 (2013.01); G01B 11/14 (2013.01); A61B 2562/0238 (2013.01); A61B 2576/026 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An optical measurement system comprising:
a light source configured to emit a first light pulse and a second light pulse toward a target, the first light pulse having a first wavelength and the second light pulse having a second wavelength different from the first wavelength;
a detector; and
a processing unit configured to:
determine a plurality of temporal distributions of photons included in the first light pulse and the second light pulse and detected by the detector after the photons are scattered by the target, and
determine, based on the plurality of temporal distributions and a source-detector distance estimation model, a distance between the light source and the detector.