Room-Temperature Infrared Focal Plane Array Performance

Influence of thermal radiation of cold diaphragms on the performance of IRFPA with variable F-number

“…The target temperature is T T , the background temperature is B T , the photon radiant exitance of the target in the 2π field of view is T N , the radiant exitance of photon of the background in the 2π field of view is B N , and both units are photon numbers/s• m 2 (in the following text, N represents the photon radiant exitance, PRE for short). The formula is as follows [11] : , and the formulas are as follows [12]:…”

“…From the perspective of detector NETD, the thermal radiation generated by the diaphragms essentially reduces the cold shield efficiency, the thermal radiation of the cold shield is ignored, and the formula is as follows [12,13] : efficiency can be obtained by bringing Formula (10) and Formula (17) into Formula (23).…”

Recent advances in infrared imagers: toward thermodynamic and quantum limits of photon sensitivity

“…Typically, infrared detectors need to operate at cryogenic temperatures in order to suppress the thermally-activated noise mechanisms intrinsic to their narrow band gap. Since cooling system are expensive and bulky, increasing the operating temperature is another primary strategy for reducing both the SWaP and the cost of infrared imagers [41,42]. In addition, higher operating temperature intrinsically enhances the performance of the imagers, such as by reducing the cooling-down dead time [27].…”

“…In addition, higher operating temperature intrinsically enhances the performance of the imagers, such as by reducing the cooling-down dead time [27]. Finally, obviating the need for cryogenic cooling is crucial for extending the application of SWIR imagers to portable devices as well as for operation in remote areas [14,41,43]. The goal for hightemperature operation is generally set to 200-220 K, since this temperature range can be achieved by thermoelectric coolers, with the ultimate goal of room-temperature operation.…”