小型化相机是支持低成本徽型飞行器或徽小卫星对地观测等多项应用的关键设备,由此提出了一种高分辨率大面阵的小型化成像系统.首先预估了该成像系统用于目标观测的像元分辨率和幅宽.然后阐述了该系统的电子学方案,对其中的关键芯片 OV14825的工作原理进行了介绍,并分析了基于 FPGA的串行差分数据接收转发的软件设计.最后基于设计的相机样机开展了成像实验,在13 m成像距离条件下获取图像分辨率优于0．5 mm,而且图像细节丰富,层次分明,证明该方案切实可行.高分辨率大面阵徽型相机具有很好的应用价值.
The miniature cameras are the critical equipments to support the low-cost Micro Air Vehi-cles or small satellites for earth observation and many other applications.So a miniature imaging sys-tem with high resolution and large area array was proposed in this paper.Firstly,the target sampling distance and swath width were estimated for the designed imaging system.Then the electronic scheme of the system was described,where the working principle of the key chip OV14825 was introduced, and the software design based on FPGA was analyzed for serial differential data receiving and forward-ing.Finally,imaging experiments were carried on the designed camera.The resolution was better than 0.5 mm when imaging in the 13 m distance,and the obtained images were rich in details,which proved that the scheme was feasible.And the miniature cameras with high resolution and large area array were of great value.
参考文献
| [1] | Kashif G.Camera Design for Pico And Nano Satellite Satellites[M].Lunea University of Technology,2010 |
| [2] | 尤政;于世洁;林杨.基于CMOS图像传感器的纳型卫星遥感系统设计[J].清华大学学报(自然科学版),2004(8):1047-1050. |
| [3] | 熊平.CCD与CMOS图像传感器特点比较[J].半导体光电,2004(01):1-4,42. |
| [4] | 邢汝佳 .基于CMOS图像传感器的成像系统研究[D].中国科学院西安光学精密机械研究所,2007. |
| [5] | 王军;李国宏.CMOS图像传感器在航天遥感中的应用[J].航天返回与遥感,2008(2):42-47. |
| [6] | 陶淑苹;金光;曲宏松;贺小军;杨秀彬.实现空间高分辨成像的数字域时间延迟积分CMOS相机设计及分析[J].光学学报,2012(4):93-101. |
| [7] | 董岩;张涛;李清军;李文明;贾继强;陈浠惠.基于PCI总线的CMOS图像传感器OV6620的驱动设计[J].液晶与显示,2010(3):460-465. |
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