Initial situation
Enabling operation at night was and still is one of the most important tasks of passive imaging devices (cameras and night vision goggles) in defence and security applications (military, boarder protection etc.). Today’s technologies enable using the complete optical spectrum from the visible up to the thermal infrared. Roughly to differentiate are the visible and near infrared (VIS/NIR), the shortwave infrared (SWIR) and the thermal mid wave (MWIR) and long wave (LWIR) infrared. Each of these ranges has its own advantages and disadvantages. Knowing these and the corresponding technology state of the art enables and improves selecting and operating cameras in night vision applications.