Based On The Three Dimensional Noise Uncooled Infrared Detector Test System Research

Uncooled infrared detector has been widely used in many fields such as military, industry and agriculture due to its superior performance. However, with the rapid development of infrared technology, there exists a major problem of how to accurately evaluate the performance of the IRFPA (Infrared Focal Plane Array). At present, the development of infrared technology in foreign countries is far beyond that of our country. Unfortunately, with the blockade of the technology, the technical core can not be solved. Therefore, developing an uncooled infrared detector test system with independent property rights plays an extremely important role in the development of infrared technology.A brief introduction on the development trends of uncooled infrared detector both at home and abroad is firstly given in this paper, based on which a test method of assessing the detector performance and an algorithm of calculating various parameters are introduced. And the three-dimensional noise model is used to analyze the noise of the uncooled infrared detector. A test system for the uncooled infrared detector based on Visual C++platform is established in this paper, which has the advantages of good compatibility and stability.Both hardware and software are included in the system. The application of the hardware helps offer the excitation signals for the IRFPA and finish data conversion. And by using NI PCIe-6537together with the software platform we can fulfill high-speed and accurate data acquisition. The software platform is based on VC++environment and is using MFC, which has good user interface. Users can select appropriate modules to operate on their demands. Dynamic Link Library is used to control the PCIe-6537in the software. The software accomplishes various ways of data acquisition and by using PC calculates the parameters and then saves the results when this option is selected. Furthermore, on the characteristics of the infrared image, the system also completes NUC (non-uniformity correction) and gray stretch. The real-time imaging is achieved and the image quality is then improved. It may make the realization of portable imaging devices available. The test system achieves a rapid assessment of the detector, and it also completes the noise analysis by using three-dimensional noise model. In order to verify the correctness of the test system, we use the system to test the UL01011and analyze its characteristics. The results reveal that RMS is693.8μV, the spatial noise is0.191V, the average responsivity is9.85mV/K and the NETD is98.8mK, which are consistent with the datasheet report. So the system is tested to be accurate and it fulfills our demands. We also test the UIRFPA of320×240made by our labs through the three-dimensional noise model and we have analyzed the reasons of noise by using original image as well. This provides a reference for designing and improving the UIRFPA. By testing the uncooled infrared detector built by our labs, we conclude that the imaging quality is good after being processed. After all the analyses and tests, we can see that the topic of this paper is of great significance on the promotion of the uncooled infrared detector technology, and it will effectively help forward the development of the uncooled infrared detector in our country.