The researches of laser disturbance effects in IR system processing circuit

According to principle of IR processing circuit and time constant of RC,the output signal of processing circuit is analyzed when laser irradiates IR system. At first,the output signal of processing circuit is disappear,then it becomes normal gradually. By theoretical analysis and experiment research,the disappearance of output signal in IR system is not only related with power and time of laser,but also related with the time constant of RC. The bigger of RC time constant,the longer the time which output signal of processing circuit is disappear and becomes normal. When laser irradiates IR system,the disturbance time of output signal is not only related with thermal effects generated by absorbed power of detector and filter,but also related with the time constant of RC in IR system. The experiment proves that the theoretical analysis is advisable.