US 12,136,498 B1
System and method for measuring spatially resolved velocity and density of air flows simultaneously
Thomas P. Jenkins, Irvine, CA (US); David Feng, Pleasanton, CA (US); and Jacob George, Downey, CA (US)
Assigned to METROLASER, INC., Laguna Hills, CA (US)
Filed by METROLASER, INC., Laguna Hills, CA (US)
Filed on Oct. 12, 2023, as Appl. No. 18/486,076.
Int. Cl. G21K 1/10 (2006.01); G01N 9/00 (2006.01); G01N 15/0227 (2024.01); G01N 21/47 (2006.01); G01P 3/68 (2006.01); G06T 7/292 (2017.01)
CPC G21K 1/10 (2013.01) [G01N 9/00 (2013.01); G01N 15/0227 (2013.01); G01N 21/4795 (2013.01); G01P 3/685 (2013.01); G06T 7/292 (2017.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a laser configured to form a two-dimensional light sheet and interrogate an air flow of molecules at a measurement region with the two-dimensional light sheet;
a first filter and a second filter;
a first camera oriented toward the measurement region at a first angle with respect to a direction of the two-dimensional light sheet, wherein the first camera is coupled to the first filter and configured to acquire images of scattered light from the measurement region through the first filter;
a second camera oriented toward the measurement region at a second angle with respect to the direction of the two-dimensional light sheet, wherein the second camera is coupled to the second filter and configured to acquire images of scattered light from the measurement region through the second filter; and
a processor configured to determine a two-dimensional spatial distribution of density and velocity values of the air flow of molecules based on the images acquired via the first camera and the second camera,
wherein the first angle and the second angle are selected such that a Doppler shift measured at either the first angle or the second angle is zero.