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Radiometric temperature measurement by incoherent digital holography
Applied Optics
|March 16, 2019
Summary
This study demonstrates radiometric temperature measurement using incoherent digital holography. This technique allows for 3D temperature mapping of thermal radiation from objects at any distance.
Area of Science:
- Optics and Photonics
- Metrology
- Thermal Engineering
Background:
- Radiometric temperature measurement traditionally relies on line-of-sight methods.
- Incoherent digital holography offers potential for non-contact, 3D thermal imaging.
Purpose of the Study:
- To demonstrate radiometric temperature measurement using incoherent digital holography.
- To enable three-dimensional radiometric temperature measurement of thermal radiation.
Main Methods:
- Utilizing an optical configuration with fixed magnification to record incoherent holograms.
- Reconstructing in-focus images of thermal radiation at any distance.
- Deriving spectral radiance from reconstructed image intensity signals.
- Implementing calibration procedures to correlate holographic signals with radiation temperature.
Main Results:
- Successful demonstration of radiometric temperature measurement via incoherent digital holography.
- Reconstruction of 3D temperature information from thermal radiation.
- Quantification of spectral radiance from holographic intensity data.
Conclusions:
- Incoherent digital holography is a viable technique for 3D radiometric temperature measurement.
- The method allows for temperature mapping of thermal radiation without distance limitations.
- Further analysis of experimental results and uncertainty sources is provided.
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