Calculational modelling of the main characteristics of an uncooled linear microbolometer array

Performance model for uncooled infrared bolometer arrays and performance predictions of bolometers operating at atmospheric pressure

“…(1)-(9) of the NETD model are derived from Eqs. (11)- (20), which are commonly used equations [4][5][6][7][8] modified to take the influence of the ROIC input impedance into account…”

“…(1)-(9) correctly predict these contributing NETD parts when the infrared bolometer and system design parameters are set to the values shown in Table 1. All values in Table 1 are typical values for the respective parameters used in uncooled infrared bolometer arrays [4][5][6][7][8][9][10][11][12]20].…”

“…The 1/f-noise constant K is a material parameter that can vary several orders of magnitude for different resistive materials and even small variations of the material composition can dramatically change K [7]. For most materials, K is not very well documented in literature, however, epitaxial grown, mono-crystalline materials can have a dramatically lower K than amorphous or poly-crystalline materials.…”

“…(10) [14]. For conventional infrared bolometer arrays, the bolometer resistance R bol and the input impedance R ROIC of the ROIC are on the order of 10-200 kX [7,9,12,20].…”

“…Various authors have developed figures of merit describing infrared bolometer and system performances such as responsivity ðRÞ, noise equivalent power (NEP), detectivity (D * ), and noise equivalent temperature difference (NETD) [4][5][6][7][8]. The responsivity ðRÞ is defined as the output signal voltage or output signal current of an infrared bolometer pixel per incident radiant power on the pixel.…”