简介：Anonlinearitymeasurementofthecharge-coupleddevice(CCD)arrayspectrometerusingfluxadditionandcomparisonmethodisdescribed.Thelightwithvariouscolorsfromthecolorfullightemittingdiode(LED)lightsourceisappliedtomeasurethenonlinearityofthespectrometeratdifferentwavelengths,respectively.Anhigh-endCCDarrayspectrometeristested.ForcolorfulLEDlightsources,thenonlinearityfactorsoftheCCDarrayspectrometer(absolutevalue)areasfollows:k<0.8%forwhitelight,k<1.1%forredlight,k<2.2%forgreenlightandk<4.7%forbluelight.Byusingthosequasi-monochromaticlightsources,itisshownthatthenonlinearitydependsonthewavelength.Itisimportanttobewarinessaboutthespectralnonlinearityandrelateduncertaintyevaluationwhenthenarrow-bandlightsourceistested.