Advantages of QWIP technology in infrared thermal cameras

摘要

Standard GaAs/AlGaAs quantum well infrared photodetectors (QWIP) have been seriously considered as atechnological choice for the 3rd generation of thermal imagers in the long wave infrared band (LWIR) for some time.Alternative technology like MCT (HgCdTe) was the technology choice of the 2nd generation because of its high quantum efficiency.In the paper,measurements on the QWIP technology will be presented and a comparison with alternative technology will be done.