Multi-sampling and filtering technology of IRFPA

In order to overcome the drawbacks of low SNR of IR (infrared) images and resolve the problem that widely used 2D-TDI (two dimensional time delay integration) algorithm could only be applied to static or slow-moving targets, the application of multi-sampling and filtering technology is discussed in this paper. The technology adopted the method of sampling the same pixel repeatedly in one image which ensured that it could be applied to fast-moving targets and lowered random noise of IR images in the meantime. Both the images effects and the experimental data show that multi-sampling and filtering technology of infrared focal plane array (IRFPA) have the same ability of improving SNR (signal noise ratio) of IR images as the 2D-TDI algorithm which can raise the SNR of IR images to m times of the original ones (m equals to the sampling times at the same pixel), and the experimental result also proves that the technology can be applied to all moving targets.