Auroral Far Ultraviolet Broadband Imager Prototype Image Acquisition And Transmission Systems Developed

Aurora is one of the most important natural luminescence of space optical radiation, and the Far ultraviolet band (140nm—190nm) contains the most key information of the aurora. Meanwhile, space-based auroral imaging detection has many advantages. So we designed a prototype of the space-based far-ultraviolet auroral imager. The prototype includes 4 parts: telescope, image intensifier, optic-coupled system and image acquisition and transmission part. Here we mainly discussed the image acquisition and transmission part of the prototype.The function of the image acquisition and transmission part is to collect the visible image signals from the image intensifier, and translate the signals to digital signal and then send them to computer. Whether its design is good or not affects the sensitivity and resolution of the prototype, and it will affect the outcome of detection directly. Image acquisition and transmission part focus on the purpose of high-speed data acquisition and transmission, so we use CCD to collect image signals, use the AD with the correlated double sampling to handle CCD output signal, use CPLD to generate the controling and driving signals, and use USB to transmit data to computer. After introducing the background, we highlight the hardware design and software design of the image acquisition and transmission system part, exposition of the various choices of modules and the realization of the physical links, and the design of the programs that produce controling and driving signals, and communication programs. The test results show that the image acquisition and transmission part achieves the basic functions. At the end of this article there are a summary of the stage work and prospects of future work.