Under different uniform temperature field,the effects on spectral bandwidth and signal noise ratio(SNR) of the HSI due to the slit s width changing are deduced.

Based on the new configuration of optic stress system, we need to design a wide bands and long focal night vision collimating lens.

However, because of the work-band restrictions of the traditional LLL image intensifier test system, it s unable to test ultraviolet (UV) and near-infrared bands of the image intensifier; therefore it s necessary to develop a new test system to complete the wide spectrum of the image intensifier performance measurement.