为了提高光电经纬仪上图像传输系统的性能, 建立了光纤传输系统, 本文针对传统CameraLink光纤传输系统方案中FPGA开发繁琐的问题, 结合CameraLink接口协议和串行/解串行技术,设计了一种新的base型CameraLink的光纤传输系统, 该系统采用SerDes芯片组MAX9259/MAX9260代替编解码芯片, 实现数据在Cameralink并行接口与光电转换模块串行接口之间的相互转化, 并通过两种实验方案验证了系统的可行性。该方案省去传统方案中时分复用及异步FIFO缓存, 降低了光纤传输系统的开发难度, 并缩短了研发周期。实验结果表明: 系统传输速率达到25 Gb/s, 具有传输稳定可靠, 传输图像质量好, 带宽高, 抗电磁干扰能力强等特点, 可满足多种像素时钟相机的需求。

In order to improve the performance of image transmission system in the photoelectric theodolite, the optical fiber transmission system is established. Aiming at complicated FPGA development in the traditional CameraLink optical fiber transmission system, combining with the CameraLink interface protocols and the serial/deserial technology, we design a new base type CameraLink optical transmission system, using SerDes chipset MAX9259/MAX9260 instead of the codec chip to realize the mutual conversion of data between the Cameralink parallel interface and the photoelectric conversion module serial interface, and verify the feasibility of the system by two experimental schemes. This scheme eliminates the time-division multiplexing and the asynchronous FIFO buffer in the traditional scheme, reduces the development difficulty and shortens the development cycle. The experimental results show that the transmission rate reaches 25 Gb/s, which has the characteristics of stable and reliable transmission, good transmission image quality, high bandwidth and strong anti-electromagnetic interference capability, thus meeting the needs of various pixel clock cameras.