Kinetics and dynamics of heat-flow-induced birefringence in a glass: Modulation polarimetric representation

Matyash, I. E.; Minailova, I. A.; Mishchuk, O. N.; Сердега, Б. К.

doi:10.1134/s1063783413050235

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…4, which should be actually observed after performing the described procedures. This distin guishes the radiation thermoelasticity from its ana logue induced by contact heating [19], where the coordinate function of the temperature in a homoge neous substance is monotonic and has the form of a single valued exponent. Further, the conductive com ponent is clearly pronounced against the background of the temperature dynamics of radiation origin.…”

Section: Results Of Measurements and Discussionmentioning

confidence: 99%

Modulation polarimetry of thermoelasticity induced by thermal radiation in a glass

et al. 2014

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The phenomenon of thermoelasticity induced by an external thermal radiation in a model glass sample was investigated experimentally. The thermoelasticity was detected by the optical polarization method used in studies of the photoelastic effect and modified by the probe radiation polarization modulation tech nique. This technique made it possible to increase the sensitivity of the measurement system to the strain state of a solid so that it became possible to detect thermoelasticity under conditions where the temperature gradi ent across the sample reaches a few fractions of a degree. The spatial and temporal changes of the mechanical stresses induced in the sample by a nonuniform radiation heating and, consequently, by a heat flux were mea sured. The coordinate functions of temperature as solutions of the inverse problem of thermoelasticity were obtained using the graphical integration of the experimental characteristics. The characteristic parameters of some of the heat transfer mechanisms were determined by analyzing the experimental characteristics of the kinetics and dynamics of mechanical stresses.

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Section: Results Of Measurements and Discussionmentioning

confidence: 99%

Modulation polarimetry of thermoelasticity induced by thermal radiation in a glass

et al. 2014

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“…However, curve a was obtained in the case where the beam was not maximally focused intentionally. The mechanism of its formation, which reflects the relation between the mechanical stress magnitude and the spatial tempera-ture distribution during the transient period before the stationary heating state was attained, was considered in work [22] in detail. In our case, curve 𝑎 depicts the amplitude of the circular component of an elliptically polarized wave averaged over the light spot on the temperature gradient.…”

Section: Measurement Results and Their Discussionmentioning

confidence: 99%

“…The circular componentamplitude, 𝐼 𝑣 , was registered using the modulation polarimetry method. Its specific features associated with its adaptation to the registration of thermoelasticity were described in work [22]. In particular, it was shown there that the intensity of the circularly polarized radiation component is determined by the formula…”

Section: Experimental Techniquementioning

confidence: 99%

Polarized Radiation Interferometry Research of Thermoelasticity in Silicon Crystal with the Use of Modulation Polarimetry

Minailova

2015

Ukr. J. Phys.

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By registering the polarization state of probing radiation transmitted through a silicon crystal wafer, the optical anisotropy induced in the crystal by the heat flow from an external contact heater has been studied. The modulation polarimetry technique is used, the high resolution of which allowed the measurements to be made under conditions of the low temperature gradient and, hence, temperature-independent coefficients. A superposition of two-and multibeam interferences of circularly polarized radiation is detected. It is shown that the corresponding parameters provide information on the magnitude of mechanical stresses (dielectric anisotropy), as well as on some optical coefficients.

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“…Доведено, що з нахилу цих y max (t) i можна визначити швидкiсть теплового фронту та коефiцiєнт температуропровiдностi, якщо вважати ознакою теплового фронту час максимальної кривизни температур-1603-3 ної функцiї в заданих координатах [27]. За невеликої температури нагрiву зразкiв (∆T = 5 • C), як у нашому випадку, основним механiзмом переносу тепла є звичайна теплопровiднiсть речовини, за якої тепловий фронт поширюється в середовищi порiвняно повiльно, а коефiцiєнт теплопровiдностi та теплоємнiсть практично сталi.…”

Section: T Cunclassified

Determination of the thermal diffusivity coefficient of transparent solids by a modulation polarimetry technique

Matyash¹,

Minailova²,

Максименко³

et al. 2020

J. Phys. Stud.

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Kinetics and dynamics of heat-flow-induced birefringence in a glass: Modulation polarimetric representation

Cited by 5 publications

References 6 publications

Modulation polarimetry of thermoelasticity induced by thermal radiation in a glass

Modulation polarimetry of thermoelasticity induced by thermal radiation in a glass

Polarized Radiation Interferometry Research of Thermoelasticity in Silicon Crystal with the Use of Modulation Polarimetry

Determination of the thermal diffusivity coefficient of transparent solids by a modulation polarimetry technique

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