Dose Course 2018_Flipping book

Calibration curve and scanner • Optical density is a function of the wavelength of the light source • Flat-bed color photo-document scanner use broad band fluorescent visible light sources • OD it will also depend on the sensitivity of CCD array

▪ Calibration curve is scanner dependent

▪ Need to have stable performance of the scanner before using it for

calibration or for film digitization