Determination of the nonequivalence source between electrical and radiative heating in a pyroelectric sensor using experimental voltage response and heat wave propagation theoretical model

Theoretical and experimental study of power radiometric measurements using a pyroelectric current integrator converter

“…For the 25 m PVF 2 thickness detector, we used C r = 1 nF and an input mean power of about 700 mW. Indeed, if the PVF 2 thickness increases, the maximum value of the detector response decreases [9]. In fact, we both increase the amplifier gain by increasing the capacity value and the laser radiant power which is controlled by a thermopile.…”

“…In order to understand the appearance of these rise times, we use the results of the temperature response at the interface pyroelectric/black coating due to the propagation of heat wave inside the successive elements constituting the detector (absorbent, pyroelectric material, glue and radiator) [9]. This study was developed for two modes of heating: electric and radiative, we will be satisfied to give the significant results of it [9].…”

“…This study was developed for two modes of heating: electric and radiative, we will be satisfied to give the significant results of it [9]. In this study, we take into account the heat propagation in the stacking of four successive elements constituting the detector while admitting that the heat transfer by conduction coming from the black layer towards the heatsink is carried out in a onedimensional way.…”

“…The copper heatsink is maintained at a constant temperature θ 0 . The magnitude orders of the thermal diffusivity and conductivity for each layer are summarized in Table 2 [9]. In the case where the thickness of the black layer l is lower than 4d (l ≤ 4d); where d is the thickness of pyroelectric material, the expression of the temperature θ 3 (−l, t) at x = −l, for a thermal impulse δ(x, t) on the front face of the detector, is given by the following Eq.…”

“…In the case where the thickness of the black layer l is lower than 4d (l ≤ 4d); where d is the thickness of pyroelectric material, the expression of the temperature θ 3 (−l, t) at x = −l, for a thermal impulse δ(x, t) on the front face of the detector, is given by the following Eq. [9]:…”