US 12,332,170 B2
Laser imaging of gases for concentration and location identification
Christopher Ball, Westerville, OH (US); Theodore Ronningen, Lewis Center, OH (US); Douglas Fink, Columbus, OH (US); Brett Ringel, Columbus, OH (US); Sanjay Krishna, Plain City, OH (US); Earl Fuller, Columbus, OH (US); and Douglas Mooney, Columbus, OH (US)
Assigned to Ohio State Innovation Foundation, Columbus, OH (US)
Filed by Ohio State Innovation Foundation, Columbus, OH (US)
Filed on Jul. 31, 2023, as Appl. No. 18/362,430.
Application 18/362,430 is a continuation of application No. 16/840,941, filed on Apr. 6, 2020, granted, now 11,714,046.
Claims priority of provisional application 62/889,688, filed on Aug. 21, 2019.
Claims priority of provisional application 62/829,261, filed on Apr. 4, 2019.
Prior Publication US 2024/0035961 A1, Feb. 1, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 21/3504 (2014.01)
CPC G01N 21/3504 (2013.01) 20 Claims
OG exemplary drawing
 
1. A system for evaluating methane concentration within an area of space, the system comprising:
at least one light source directing a light wave toward a windowpane comprising coatings on the windowpane, wherein the windowpane with the coatings is positioned between the at least one light source and an area of space to be analyzed in regard to methane, wherein the light wave comprises a center wavelength corresponding to the transmittance of light through the windowpane and the coatings;
at least one processor in at least one computer modulating the light source between an on-resonance state, relative to the absorption spectrum of the methane and an off-resonance state, relative to the absorption spectrum of the methane;
an imaging device positioned relative to the area of space such that the imaging device receives reflected light from the area of space, the imaging device configured to form an image from the reflected light showing the presence or absence of the methane within the area of space.