基于CMOS图像传感器多斜率光积分的研究

Multiple Slope Integration Based on CMOS Image Sensor

基于CMOS图像传感器IBIS5-A-1300驱动时序,对多斜率光积分进行了研究,并实现同步快门模式下的多斜率光积分.选用CPLD器件作为硬件设计载体,使用VHDL语言对时序发生器进行了硬件描述.采用QutartusⅡ软件对所作的设计进行了功能仿真.实验结果表明,多斜率光积分有效扩展了普通线性转移成像器的光学动态范围.

The principle of multiple slope integration is introduced. Based on analysis of driving schedule of Cypress IBISS-A-1 300 CMOS image sensor, multiple slope integration in synchronous shutter is implemented. In this design, complex programmable logic device（CPLD） is chosen as the hardware design platform; driving schedule generator is described with VHDL. The function simulation of the system is successfully fulfiled with Qutartus Ⅱ software. The result of experiment indicates that multiple slope integration is a good method to extend the dynamic range of linear transfer image sensor.