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Updated: May 18, 2026
11:34
Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
Published on: May 15, 2017
Surface heating by optical beams and application to mid-infrared imaging.
Alain Haché1, Phuong Anh Do, Stefano Bonora
1Département de Physique et d’Astronomie, Université de Moncton, Canada. hachea@umoncton.ca
Applied Optics
|October 4, 2012
Summary
This study explores surface heating by optical beams for infrared imaging using vanadium dioxide films. It links imaging parameters like resolution and response time to thermal properties and beam characteristics.
Area of Science:
- Materials Science
- Optical Physics
- Thermal Physics
Background:
- Infrared imaging requires precise control of surface temperature.
- Vanadium dioxide (VO2) thin films exhibit unique thermal and optical properties.
- Understanding heat diffusion from optical beams is crucial for advanced imaging applications.
Purpose of the Study:
- To theoretically investigate surface heating by optical beams.
- To compare theoretical models with experimental results for VO2 thin films.
- To establish relationships between imaging parameters and thermal/optical properties.
Main Methods:
- Extending existing solutions for point heat source diffusion.
- Analyzing steady-state and dynamic thermal regimes.
- Modeling Gaussian and flat optical beam profiles.
- Comparing theoretical predictions with experimental data.
Main Results:
- Developed a theoretical framework for optical beam heating of surfaces.
- Demonstrated the applicability to vanadium dioxide thin films.
- Established quantitative links between thermal diffusivity, beam parameters (dimensions, intensity), and imaging performance (spatial resolution, response time).
Conclusions:
- The theoretical model accurately describes surface heating by optical beams in VO2 thin films.
- Thermal diffusivity is a key parameter influencing imaging performance.
- The findings provide a basis for optimizing infrared imaging systems utilizing VO2 films.
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