In this study， a high-frame-frequency camera system is investigated to closely capture the collision process of a high-speed moving target. As debris from the collision may get stuck to the front of the lens， a protective window assembly is considered. A thermal conduction device was also investigated because the temperature of an FPGA installed in the imaging unit is too high， with a maximum temperature of 70 ℃. A method for continuous photography with seven image units under the control of a sequence pulse was proposed，and the camera system achieved high frame-frequency imaging of 50，000 fps. The protective window assembly included three sets of self-locking protective window glasses that move automatically. A worm gear was utilized to realize a large transmission ratio and self-locking function， and a Hall sensor was used to report the position of the protection window in real time. The middle part of the heat conduction device comprised flexible graphite plate with high thermal conductivity. Thus， the heat of the FPGA was transmitted effectively to the shell， and the problem of over-positioning of rigid heat conduction devices was solved during the installation and adjustment of the device. Vibration and heat tests were carried out on the assembled model camera. During and after the tests， the self-locking，movement and switching of the protective window component function properly， the camera works normally， and the measured frame rate is 50050 frames/s. Hence， the camera system meets the requirements for clearly recording high-speed collisions， and provides a certain protection ability as well as adaptability to different thermal environments.