从电源和驱动时序两方面入手，对影响CMOS 图像传感器LUPA-4000 成像质量的各种因素进行了分析。在此基础上，设计并实现了一套基于FPGA 和ARM 的具有参数调整功能的成像系统。LUPA-4000 工作中需要调节的7 种电源，采用了可调电阻与相应电源芯片相结合的方法进行设计。调整LUPA-4000 驱动时序所需的多个参数首先在PC 机中进行设置，然后通过基于ARM 的以太网传输至FPGA。实测显示，该成像系统操作灵活、可扩展性强，能够对LUPA-4000 驱动时序中多种参数进行精确的调整。本文对在实现该成像系统中需要解决的三个主要问题：硬件电路中可调电源的设计、参数的设置与传输方法以及LUPA-4000 驱动时序的FPGA 实现，都进行了详细的描述。

Factors which affect the imaging quality of CMOS image sensor LUPA-4000 were investigated by analyzing the power supplies and the driving timing. Considering these factors, a CMOS imaging system with adjustable power supplies and driving timing was designed and implemented based on FPGA and ARM. Seven power supplies needed to be adjusted during LUPA-4000’s working were designed by means of the combination of adjustable resistances and corresponding power chips. Parameters used in the adjustment of LUPA-4000’s driving timing were set in PC firstly, and then transported to FPGA through Ethernet based on ARM. Actual tests showed that the imaging system can be operated and expanded flexibly, and can adjust all kinds of parameters in LUPA-4000’s driving timing precisely. Three main topics are discussed in this imaging system, including design of adjustable power supplies, methods of parameters’ setting and transmitting, and FPGA implement of LUPA-4000’s driving timing.