积分时间对红外焦平面成像系统的影响

结合电容反馈互导放大结构读出电路，理论上分析了积分时间与红外成像系统输出信号之间的关系，在电路参数固定的情况下得出：输出电压的变化和积分时间的变化成正比。以电子数法分析了积分时间与噪声及比探测率之间的关系，推导出积分时间、噪声和比探测率之间的非线性关系。分析了积分时间变化对非均匀性的影响，并通过试验对其变化趋势和影响效果进行了验证。说明了积分时间选取对红外焦平面成像系统设计的重要性。

Influence of integration time on IRFPA imaging system

The relationship between integration time and the output signal of IRFPA imaging system was theoretically analyzed with the CTIA readout circuit. The results indicate the variation of the output voltage is proportional to the integration time when the parameters of the circuit are fixed. The relationship between integration time and noise, and the relationship between integration time and specific detectivity were analyzed with the electrons method. The non-linear relationship of the integration time, noise and specific detectivity was derived. The influence of the integration time variation on the non-uniformity was analyzed. The changing trend and the influence result were proved by the experiments. It shows that the integration time is very important to the design of IRFPA imaging systems.