线阵CCD广泛用于弱光的检测,但设置不当容易使器件工作进入非线性区.本文就其光电响应的两个因数-光强和积分时间,分别设计了实验并验证了CCD 工作的非线性效应.利用LED 的光通量?电流响应特性,研究了用LED 发光来测定CCD 输出与光强之间的关系;用标准灯照明,通过改变积分时间研究CCD 输出与积分时间之间的关系.观察两个实验结果,采用晶体管模型来分析CCD 的光电响应特性,分别对线性区和非线性区做了对比.结果表明,线阵CCD 的非线性效应明显,实际应用中应充分利用其优异的线性响应特性.

Linear CCD has been widely used in low light detection,but it’s easy to operate the device into the nonlinear region if set incorrectly.Two factors of optical response-light intensity and integration time were analyzed in the article,and experiments were conducted to test and verify CCD nonlinear effects.Because of its flux-current response,LED light was researched to determine the relationship between the output and the light intensity.Relationship between CCD output and the integration time was also researched through changing integration time.Observing the two experiment results,transistor model was used to analyze CCD optical response and linear region together with nonlinear region was compared.The results show that CCD nonlinear effects are apparent and its excellent linear region should be made full use of in application.