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

Мачихин, А. С.; Zinin, Pavel V.; Shurygin, A. V.; Khokhlov, Demid D.

doi:10.1364/ol.41.000901

Cited by 33 publications

(16 citation statements)

References 14 publications

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“…A detailed description of the TAOTF operation can be found elsewhere [7,9,10]. Briefly, the main component of the system is an imaging TAOTF synchronized with a video camera.…”

Section: Fig 1 the Sketch Of The Lh-taotf Systemmentioning

confidence: 99%

“…[13] shows that the TAOTF system combines reliable spectral imaging with several important features: absence of spatial distortions and chromatic drift; high spectral contrast; and increased signal-to-noise ratio. In the TAOTF imaging system, the image captured by the camera represents a distribution of the intensity irradiated by a specimen at a given wavelength λ controlled by the TAOTF [7].…”

Section: Fig 1 the Sketch Of The Lh-taotf Systemmentioning

confidence: 99%

“…For many applications, such as experiments on measuring acoustical wave velocities under high temperatures [3,4] and studying phase transitions under high pressure and high temperatures of carbon materials [5,6], it is important to know the TD on the surface of a solid heated by a laser. Recently the twodimensional (2D) distribution of the surface temperature of a millimeter-sized object was measured using TAOTF [7]. A set of spectral images (up to a few hundred) was taken by the TAOTF imaging system in order to fit the measured spectral curves in each pixel to the Planck radiation function and to determine the temperature.…”

Section: Introductionmentioning

confidence: 99%

“…In these experiments, the TD of a tungsten filament heated by a constant current from a stabilized current source was measured. In [7], TD was measured from a relatively large area of 2.5×2.5 mm 2 . However, it is a challenge to measure the 2D TD inside a spot with a size of several microns heated by a laser beam.…”

Section: Introductionmentioning

confidence: 99%

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Multi-spectral image processing for the measurement of a spatial temperature distribution on the surface of a laser-heated microscopic object

et al. 2017

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In this paper, we demonstrate that combining a laser heating (LH) system with a tandem acousto-optical tunable filter (TAOTF) allows us to measure the temperature distribution (TD) across a laser-heated microscopic specimen. Spectral image processing is based on one-dimensional (1D) non-linear least squares fitting of the Planck radiation function. It is applied for determining the temperature T at each point (x, y) of the specimen surface. It is shown that spectral image processing using the 1D non-linear least squares fitting allows measurement of the TD of the laserheated microscopic specimen with higher precision and stability than those of the conventional linear least-squares fitting of the Wien approximation of Planck's law.Keywords: laser heating, diamond anvil cell, temperature measurement, acousto-optical tunable filter, spectral imaging.Citation: Bulatov KM, Mantrova YV, Bykov AA, Gaponov MI, Zinin PV, Machikhin AS, Troyan IA, Batshev VI, Kutuza IB. Multi-spectral image processing for the measurement of a spatial temperature distribution on the surface of a laser-heated microscopic object.

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“…A detailed description of the TAOTF operation can be found elsewhere [7,9,10]. Briefly, the main component of the system is an imaging TAOTF synchronized with a video camera.…”

Section: Fig 1 the Sketch Of The Lh-taotf Systemmentioning

confidence: 99%

Section: Fig 1 the Sketch Of The Lh-taotf Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-spectral image processing for the measurement of a spatial temperature distribution on the surface of a laser-heated microscopic object

et al. 2017

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“…When the ultrasonic wave propagates in the crystal, it interacts with the incident light. Bragg diffraction occurs only when the condition of Bragg diffraction is satisfied [11][12][13][14] . In this case, the radio frequency drive signal corresponds to the wavelength of the diffracted light.…”

Section: Introductionmentioning

confidence: 99%

Single acousto-optic tunable filter based double filtering imaging system

Zhang

Sheng

Chen

et al. 2019

14th National Conference on Laser Technology and Optoelectronics (LTO 2019)

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The double filtering system based on single crystal acousto-optic tunable filter (AOTF) in order to improve spectral resolution and reduce side lobe is designed and demonstrated. The effects of single filtering and double filtering on AOTF performance are analyzed. Furthermore, the proposed double filtering technology has the characteristics of high speed, strong stability, flexible tuning, narrow bandwidth and multi-wavelength selection. In this experiment, the spectral bandwidth, side lobe and diffraction efficiency of single filtering and single crystal double filtering in visible range are measured. A double optical wedge compensator is set up at the exit of the double filtering experiment system to compensate the diffracted light drift caused by chromatic aberration. In conclusion, the experimental method of double filtering based on single crystal of tellurium dioxide is better than that of single filtering in spectral resolution and side lobe suppression.

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Simultaneous measurements of the two-dimensional distribution of infrared laser intensity and temperature in a single-sided laser-heated diamond anvil cell

Bulatov

Zinin

Mantrova

et al. 2018

Comptes Rendus. Géoscience

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In this report, we demonstrate that combining the laser heating system in a diamond anvil cell (LH-DAC) with a tandem acoustic-optical tunable filter (LH-DAC-TAOTF) allows for the simultaneous measurement of (a) the relative infrared (IR, 1070 nm) power distribution on a specimen surface in the DAC; (b) the temperature distribution under laser heating of a specimen under high-pressure in a DAC; it also (c) provides an opportunity to control the shape of the IR laser spot on the surface of the heated specimen.The effect of the p-shaper on the shape and the position of the focus of the IR laser beam on a specimen using a TAOTF is also presented. For a 10Â long-working distance objective, the smallest diameter of the IR laser was found to be around 10 mm, when the focal plane coincides with that of the imaging optical system of LH-DAC. The highest diameter of the IR laser was shown to be 20 mm when the rim of the p-shaper was set at 3 mm. It is demonstrated also that the TAOFT not only permits to measure the two-dimensional (2-D) distribution of the IR laser power, but also allows for the alignment of the laser before each heating event at different pressures.

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

Cited by 33 publications

References 14 publications

Multi-spectral image processing for the measurement of a spatial temperature distribution on the surface of a laser-heated microscopic object

Multi-spectral image processing for the measurement of a spatial temperature distribution on the surface of a laser-heated microscopic object

Single acousto-optic tunable filter based double filtering imaging system

Simultaneous measurements of the two-dimensional distribution of infrared laser intensity and temperature in a single-sided laser-heated diamond anvil cell

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