溢油荧光光谱探测系统不同增益下的光谱定标  

Radiometric Calibration of Fluorescence Detection System with Different Gain Settings

作　　者：杨俊[1] 亓洪兴[1] 

机构地区：[1]中国科学院上海技术物理研究所,上海20083

出　　处：《科学技术与工程》2011年第10期2195-2200,共6页Science Technology and Engineering

摘　　要：提出了一种采用氘灯、卤钨灯双标准光源对溢油荧光光谱探测系统进行光谱辐照度定标的方法,并使用光纤耦合余弦校准器对光谱仪的定标数据做了余弦校正。用于紫外-可见光波段溢油紫外光诱导荧光光谱的探测,解决了卤钨灯在(250—400)nm波段辐射强度弱和大多数光谱仪器在紫外波段响应较差而导致的定标困难问题。对增强型CCD不同的增益情况下分别进行了光谱仪辐射定标,分析了光谱探测信噪比对定标系数与增益之间的线性关系的影响。为荧光光谱探测的自动增益控制系统提供了有效的参考数据。使用定标后的光谱仪获取了柴油和润滑油经宽谱段紫外灯激发的诱导荧光光谱,其紫外光诱导荧光在360 nm处附近存在响应峰值,可以用于水面溢油监测。A spectral irradiance calibration method for UV-induced fluorescence spectra detection of oil spill was presented.A CC-3-UV cosine corrector was used to correct the calibrate curve.The method uses two standard light sources,deuterium lamp and halogen lamp instead of one light source,which could overcome the hard to calibrate（250—400） nm band problem caused by the weak ultraviolet response of most spectral radiometer and poor signal-noise ratio.The calibration curve is tested under the condition of fixed integration time and different MCP gains and the relationship of the response and the MCP gain is studied.The response characteristics under deferent gain levels of detection system can be used as a reference in designing auto gain adjustment algorithm for oil detection.Fluorescence detection system calibrated by this method is used in lubricating and diesel oil detection experiments and the spectra obtaines indicates that there is fluorescence wave crest around 360 nm which could be used as the character of oil spill on the water.

关 键 词：标准光源 荧光 紫外光诱导 余弦校准器 增强型CCD 

分 类 号：TE991.5[石油与天然气工程—石油机械设备] O433.4[机械工程—光学工程]