Research On Long Wave Infrared Interference Image Acquisition Technology

With the rapid development of infrared imaging spectrum technology, the research oflong wave infrared interference image acquisition technology has more and more importantapplications in the modern military, security, medical treatment, scientific research, disasterrelief and so on. To the manufacture of interference imaging spectrometer and research to thespectrum image information of objectives, interference image acquisition technology has avery important significance.Based on the characteristics of a variety of static interferometer, paper has chosenequivalent wedge interferometer as the interference component of image acquisition system.The type of France ULIS company UL04371uncooled infrared array detector is selected asinfrared interference image acquisition device.Firstly,the detection principles of interferenceimaging are analyzed.The hardware drive circuit is using single chip microcomputer andFPGA as control chips.Microcontroller STC89C52is responsible for the control and displayof the detector adjustable offset voltage. The FPGA is responsible for the detector drive anddata processing. Hardware driver circuit and the moving part of detector circuit is connectedusing FFC line for the adjustment of the detector position.The FPGA and LabVIEW iscommunicated with USB2.0interface circuit. LabVIEW is used to complete the USB datareceiving, processing and interference image display.Second,The detector FPGA drive control program,image data caching program,LabVIEW image data receiving and display program as well as the control and displayprogram of the microcontroller bias voltage were completed.According to the effect oftemperature and bias voltage on the detector detection rate, noise equivalent temperaturedifference and the noise voltage, the reasonable offset voltage and detector temperature wereset. Good working performance of the detector was achieved. Finally, The experiment platform of detector infrared imaging and the experimentplatform of interference image acquisition system were built to test the imaging effect.The300℃blackbody interference image was achieved.