Method of spectral measurement and spectroradiometer having wavelength calibration function.

摘要

In order to decrease errors in spectral measurement, the data measured at sampling wavelength intervals smaller than the wavelength sampling intervals are changed to data of wavelength sampling interval of spectral effective curve. If the wavelength half-bandwidths to be measured are different from the wavelength sampling intervals, the spectral data at wavelengths in correspondence with the wavelength sampling intervals are obtained with interpolation. In a spectroradiometer, wavelength scale is calibrated with use of a plurality of line spectra of specified wavelengths, and the photoelectric outputs are integrated with use of the addresses of elements as a weight factor. <IMAGE>