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Measurement of the modulation transfer function of infrared cameras

机译：红外摄像机调制传递函数的测量

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The performance of starting PtSi infrared cameras is characterized based on estimating their spatial frequency response. Applying a modified knife-edge technique, we arrive at an estimate of the edge spread function (ESF), which is used to obtain a profile through the center of the 2-D modulation transfer function (MTF). Using this technique, the complete system MTF in the horizontal and vertical direction is measured for various imaging systems. The influence of charge transfer efficiency (CTE) on the knife-edge measurement and resulting MTF is also modeled and discussed. An estimate of the CTE can actually be obtained from the shape of the ESF in the horizontal direction. In addition, we demonstrate that this technique can be used as a field measurement. By applying the technique at long range, the MTF of the atmosphere can be measured.
机译：基于估计其空间频率响应来表征启动PtSi红外热像仪的性能。应用改进的刀口技术，我们得出了边缘扩展函数（ESF）的估计值，该估计值用于通过2-D调制传递函数（MTF）的中心获得轮廓。使用此技术，可以针对各种成像系统测量水平和垂直方向的完整系统MTF。还对电荷转移效率（CTE）对刀口测量和所得MTF的影响进行了建模和讨论。实际上，可以从ESF在水平方向上的形状获得CTE的估算值。另外，我们证明了该技术可以用作现场测量。通过在远距离应用该技术，可以测量大气的MTF。

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