Blur Images Captured by TDICCD Due to Mechanical Vibrations

Mechanical vibrations and motions is prove to be one of the key factors that affect dynamic image quality of TDI camera. Degradation models due to mechanical vibrations and motions were established. Based on this model, analyzing image quality acquired by TDI detectors present that mechanical vibrations may cause space-variant image distortions (severe geometric warps and blur) was studied. The results indicate that in the along-scan direction abnormal linear motion and high frequency vibration only cause space-invariant image blur while low frequency vibration result in space-variant image blur and geometric distortions. In the cross-scan direction, no matter which vibration, geometric distortions will be appeared.