Precise determination of thermal parameters of a microbolometer

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F18%3APU128566" target="_blank" >RIV/00216305:26620/18:PU128566 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1350449518303049" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1350449518303049</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.infrared.2018.07.037" target="_blank" >10.1016/j.infrared.2018.07.037</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Precise determination of thermal parameters of a microbolometer

Popis výsledku v původním jazyce

Determination of microbolometer thermal properties such as thermal capacitance, conductance, time constant, and IR responsivity is of the utmost importance as they directly influence microbolometer performance. Here we show a technique to measure them by using a minimized self-heating effect, thus leading to their precise determination via measurements based on an AC-biased Wheatstone bridge containing a microbolometer. The bridge outputs were subtracted from each other by a differential voltage preamplifier with its output processed by a lock-in amplifier. The lock-in amplifier output as a function of the amplitude of AC bias provided an amplitude of microbolometer thermal conductivity. A microbolometer temperature response to pulse irradiation of its membrane provided the value of its thermal time constant and, thus, its thermal capacitance. Finally, we also extracted microbolometer responsivity using a blackbody IR source. The method was experimentally verified using a micromachined bolometer, which showed excellent agreement with the analytical solution.

Název v anglickém jazyce

Precise determination of thermal parameters of a microbolometer

Popis výsledku anglicky

Determination of microbolometer thermal properties such as thermal capacitance, conductance, time constant, and IR responsivity is of the utmost importance as they directly influence microbolometer performance. Here we show a technique to measure them by using a minimized self-heating effect, thus leading to their precise determination via measurements based on an AC-biased Wheatstone bridge containing a microbolometer. The bridge outputs were subtracted from each other by a differential voltage preamplifier with its output processed by a lock-in amplifier. The lock-in amplifier output as a function of the amplitude of AC bias provided an amplitude of microbolometer thermal conductivity. A microbolometer temperature response to pulse irradiation of its membrane provided the value of its thermal time constant and, thus, its thermal capacitance. Finally, we also extracted microbolometer responsivity using a blackbody IR source. The method was experimentally verified using a micromachined bolometer, which showed excellent agreement with the analytical solution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA17-20716S" target="_blank" >GA17-20716S: Vysoce přesné mapování vnitřní teploty a energetická balance živých buněk</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

INFRARED PHYSICS & TECHNOLOGY

ISSN

1350-4495

e-ISSN

1879-0275

Svazek periodika

93

Číslo periodika v rámci svazku

NA

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

286-290

Kód UT WoS článku

000446283400042

EID výsledku v databázi Scopus

2-s2.0-85051632648