A dynamic temperature mapping system with a 320x256 pixels frame size and 100kHz sampling rate

A novel temperature mapping system is developed to map ultrafast temperature transients distribution on electronic devices using an infrared thermo-camera . While, in principle, it should be necessary to have a high acquisition rate, our system is based on a standard infrared camera with 50 Hz frame rate together with the widely used equivalent time sampling concept which is adapted to this temperature acquisition system. This is possible because the thermo-camera is equipped with a very fast and sensitive Focal Plane Array of InSb sensors that have a minimum integration time of 10 mus, and a custom digital circuit allows the perfect synchronization between periodical experiment and the acquisition and storage of thermal images. The latter has been realized by the usage of a fully programmable FPGA digital circuit, which generates all the signals needed for the synchronization of the IR camera, the experiment, and data acquisition personal computer. In this paper we describe this system and show, with experiments, how this is capable of detecting temperature transients with an equivalent bandwidth of 100 kHz full frame, far beyond the capabilities of the fastest available IR cameras.