Patent ID: 11860087
Assignee: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. The method of claim 1, further comprising:
generating a first thermoelastic Green's function that provides a magnitude and phase of variation in displacement of the surface of the sample over time at a given location at the first frequency as a function of a distribution of heating within the sample in a vicinity of the given location in response to illumination of the sample with infrared light that varies at the first frequency; and
generating a second thermoelastic Green's function that provides a magnitude and phase of variation in displacement of the surface of the sample over time at a given location at the second frequency as a function of a distribution of heating within the sample in the vicinity of the given location in response to illumination of the sample with infrared light that varies at the second frequency,
wherein generating the three-dimensional tomographic map of absorption of infrared light at the first wavelength by the sample based on the first plurality of sets of probe measurements comprises solving for a three-dimensional pattern of absorption of infrared light at the first wavelength within the sample using the first thermoelastic Green's function and the second thermoelastic Green's function.