Fig. 3.

(a) Two partial spectra (PS4 solid trace and PS5 dotted trace) taken for a orange glass sample in the spectrometer (b) Two partial spectra (PS4 and PS5) taken for a reference lamp in the spectrometer. The artifacts introduced by the splicing procedure can be eliminated by correcting the orange glass spectrum shown in (a) for spectral response variation of the CCD detector obtained from the spectra of the reference lamp shown in (b). The results of the correction are shown in Fig. 4.