Imaging system based on a tandem acousto-optical tunable filter for in situ measurements of the high temperature distribution

We present, to the best of our knowledge, the first experimental demonstration of a new imaging system for in situ measurement of the two-dimensional (2D) distribution of the surface temperature of microscopic specimens. The main component of the system is an imaging tandem acousto-optical tunable f...

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Bibliographic Details
Published in:Optics letters 2016-03, Vol.41 (5), p.901-904
Main Authors: Machikhin, Alexander S, Zinin, Pavel V, Shurygin, Alexander V, Khokhlov, Demid D
Format: Article
Language:English
Subjects:
Approximation
Imaging
In situ measurement
Mathematical analysis
Radiometry
Spectra
Spectral emissivity
Tunable filters
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Summary:We present, to the best of our knowledge, the first experimental demonstration of a new imaging system for in situ measurement of the two-dimensional (2D) distribution of the surface temperature of microscopic specimens. The main component of the system is an imaging tandem acousto-optical tunable filter (TAOTF) synchronized with a video camera. A set of TAOTF spectroscopic images (up to a few hundreds) is taken by the TAOTF imaging system to fit the measured spectral curves in each pixel to the Planck radiation function and determine the temperature and emissivity of the sample using the gray body approximation. It is experimentally shown that this technique provides aberration-free spectral imaging suitable for precise multispectral imaging radiometry (MIR).
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.41.000901