The continuous innovation of infrared imaging technology has made uncooled microbolometers popular in military reconnaissance equipment.The research of laser interference technology has become a hot spot,and the temperature response of detector pixels irradiated by laser is the key to the success of interference.In this paper,the temperature response of the microbolometer irradiated by chopping laser is studied.Based on the UL01011 amorphous silicon detector,the model is established,and the effect on the temperature increment of modulation frequency,duty cycle and laser power are studied through finite element analysis.Through analysis and derivation,it is concluded that,when the uncooled micro-bolometer is irradiated by power-stable continuous laser modulated by chopping,the average value of the oscillation of the cell temperature in the steady state is in a negative exponential relationship with the modulation frequency;it is positively proportional to the duty cycle;and is proportional to the laser power.