US 12,345,638 B2
Optical particle counter for air quality assessment
Jaka Pribosek, Eindhoven (NL)
Assigned to AMS AG, Premstaetten (AT)
Appl. No. 17/778,153
Filed by ams AG, Premstaetten (AT)
PCT Filed Oct. 28, 2020, PCT No. PCT/EP2020/080291
§ 371(c)(1), (2) Date May 19, 2022,
PCT Pub. No. WO2021/099081, PCT Pub. Date May 27, 2021.
Claims priority of provisional application 62/939,036, filed on Nov. 22, 2019.
Prior Publication US 2022/0412866 A1, Dec. 29, 2022
Int. Cl. G01N 21/53 (2006.01); G01N 15/0205 (2024.01); G01N 15/14 (2024.01); G01N 15/1434 (2024.01); G01N 21/47 (2006.01)
CPC G01N 21/53 (2013.01) [G01N 15/0211 (2013.01); G01N 15/1434 (2013.01); G01N 15/1459 (2013.01); G01N 2015/0238 (2013.01); G01N 2015/1486 (2013.01); G01N 2021/4704 (2013.01); G01N 2021/4711 (2013.01); G01N 2021/4726 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An apparatus for sensing particulate matter in a fluid, the apparatus comprising:
a fluid flow conduit fluidically connected to an interaction chamber;
an illumination assembly positioned to illuminate the interaction chamber with a shaped illumination beam having an intensity that increases across a diameter of the illumination beam from a first side of the illumination beam to a second side of the illumination beam opposite the first side; and
a light detector disposed at the first side of the illumination beam and positioned to receive light scattered by particulate matter present in the interaction chamber.