Patent ID: 11874176
Assignee: UNIVERSITY OF PITTSBURGH—OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A two-wavelength, single-camera imaging thermography system for in-situ temperature measurement of a target, comprising:
a target light path inlet conduit for receiving a target light beam reflected from the target;
a beam splitter installed in a splitter housing at a distal end of the target light path conduit, wherein the beam splitter divides the target light beam into a first light beam and a second light beam;
a first light path conduit emanating from the splitter housing comprising a first aperture iris installed within the first light path conduit for aligning the first light beam; a first band pass filter installed within the first light path conduit for regulating the first light beam to a first wavelength λ1 and a half waveplate installed within the first light path conduit to modulate a polarization ratio of the first light beam of λ1 wavelength;
a second light path conduit emanating from the splitter housing comprising a second aperture iris installed within the second light path conduit for aligning the second light beam; a second band pass filter installed within the second light path conduit for regulating the second light beam to a second wavelength λ2;
a junction housing, wherein distal ends of each of the first and second light path conduits are connected to the junction housing;
a polarizing beam splitter installed in the junction housing, wherein the polarizing beam splitter reflects the first light beam of λ1 wavelength along the same path or a parallel path of the second light beam of λ2 wavelength that passes directly through the polarizing beam splitter unreflected to create a merged light beam comprising light of λ1 and λ2 wavelengths; and
a light path outlet conduit connected to the junction for directing the merged beam to a high-speed camera for imaging.