Ultra-broadband contactless imaging power meter

A. Aouali; S. Chevalier; A. Sommier; M. Ayadi; J.-C. Batsale; D. Balageas; C. Pradere

doi:10.1364/AO.432479

Applied Optics
Vol. 60,
Issue 26,
pp. 7995-8005
(2021)
•https://doi.org/10.1364/AO.432479

Ultra-broadband contactless imaging power meter

A. Aouali, S. Chevalier, A. Sommier, M. Ayadi, J.-C. Batsale, D. Balageas, and C. Pradere

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A. Aouali, S. Chevalier, A. Sommier, M. Ayadi, J.-C. Batsale, D. Balageas, and C. Pradere, "Ultra-broadband contactless imaging power meter," Appl. Opt. 60, 7995-8005 (2021)

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Table of Contents Category
- Imaging Systems, Image Processing, and Displays
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About this Article
History
- Original Manuscript: June 1, 2021
- Revised Manuscript: July 30, 2021
- Manuscript Accepted: August 4, 2021
- Published: September 3, 2021

Abstract

Knowledge of the spatial and temporal distribution of heat flux is of great interest for the quantification of heat sources. In this work, we describe the development of a new ultra-broadband contactless imaging power meter based on electromagnetic to infrared technology. This new sensor and the mathematical processing of images enable the reconstruction of both spatial and amplitude distributions through a wide spectral range of sources. The full modeling of the thermoconverter based on 3D formalism of thermal quadrupoles is presented first before deriving a reduced model more suitable for quick and robust inverse processing. The inverse method makes it possible to simultaneously identify the heat losses and the spatial and temporal source distribution for the first time, to the best of our knowledge. Finally, measurements of multispectral sources are presented and discussed, with an emphasis on the spatial and temporal resolution, accuracy and capabilities of the power meter.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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	Air	Thermoconverter
Thickness (m)	$\infty$	$37 \pm 1 \times 10^{- 6}$
$λ$ ( $W m^{- 1} K^{- 1}$ )	0.026	$1.414 \pm 0.041$
$ρ C_{p}$ ( $J K^{- 1} m^{- 3}$ )	1313	$2.83 \pm 0.03 \times 10^{6}$
$a$ ( $m^{2} s^{- 1}$ )	$1.98 \times 10^{- 5}$	$5.0 \pm 0.1 \times 10^{- 7}$

	Joule Effect by Resistance	NIR Laser Source	IR Blackbody Source	Gigahertz Source	Radio-Frequency Source
Spatial resolution ( $µ m^{2}$ )	$283 \times 283$	$180 \times 180$	$290 \times 290$	$280 \times 280$	$1400 \times 1400$
sensitivity ( $µ W / m^{2}$ )	$\frac{1.815 \times T I (µ s)}{A}$

	Air	Thermoconverter
Thickness (m)	$\infty$	$37 \pm 1 \times 10^{- 6}$
$λ$ ( $W m^{- 1} K^{- 1}$ )	0.026	$1.414 \pm 0.041$
$ρ C_{p}$ ( $J K^{- 1} m^{- 3}$ )	1313	$2.83 \pm 0.03 \times 10^{6}$
$a$ ( $m^{2} s^{- 1}$ )	$1.98 \times 10^{- 5}$	$5.0 \pm 0.1 \times 10^{- 7}$

	Joule Effect by Resistance	NIR Laser Source	IR Blackbody Source	Gigahertz Source	Radio-Frequency Source
Spatial resolution ( $µ m^{2}$ )	$283 \times 283$	$180 \times 180$	$290 \times 290$	$280 \times 280$	$1400 \times 1400$
sensitivity ( $µ W / m^{2}$ )	$\frac{1.815 \times T I (µ s)}{A}$

Abstract

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Tables (3)

Equations (14)

Applied Optics