RADIOMETRIC CALIBRATION

摘要

A calibration load (44 and 46) for calibrating a signal in a range of wavelengths or of a single known wavelength, the load (44 and 46) comprising a calibration surface including an emissive material, the calibration surface having relief features, such as pyramids or wedges, that have a dimension that is substantially the same as or less than the shortest wavelength of the range of wavelengths or the single known wavelength that has to be calibrated.