本文试图在时域利用红外辐射探测器对不同脉宽的探测光脉冲［准－δ（ｔ）函数脉冲］的响应来模拟计算及测量其对不同的相对脉宽（Δ／τ）的瞬态输出，从所得到输入信号相对脉宽（Δ／τ）与输出瞬态响应幅度的关系，计算并测量出探测器的响应时间，解决了在频域里对光电快速响应探测器频率测量难的问题。本文对双晶微桥型超导红外探测器进行了测试。 This paper attempts to simulate and measure the transients of different relative pulse widths (Δ / τ) in the time domain using the response of the infrared radiation detector to the probe pulses of different pulse widths [quasi-δ (t) function pulses] Output from the input signal obtained relative pulse width (Δ / τ) and the output transient response amplitude of the relationship between the calculation and measurement of the detector response time to solve the frequency response of the photoelectric fast response detector frequency measurement difficult problem. In this paper, a dual-crystal micro-bridge type superconducting infrared detector was tested.