SAMPLE ILLUMINATION CONFIGURATIONS FOR SPATIALLY-RESOLVED RAMAN-SPECTROMETRY USING A CHARGE-COUPLED-DEVICE DETECTOR

In this paper two simple configurations for sample illumination using a charge-coupled device (CCD) detector have been shown. The choice of an appropriate sample illumination can be crucial to obtain spatial an d spectral information of complex samples. It is demonstrated that sim ultaneous Raman spectra of a heterogeneous sample of three compounds c an be obtained using a vertical sample illumination. Spatially resolve d resonant Raman and surface-enhanced resonant Raman spectra of a comp lex (Ni-PAPH) have been observed with a low integration time. Dividing the CCD in two regions and with horizontal multiline sample illuminat ion (argon-ion laser at 488 nm and He-Ne laser at 632.8 nm) spatially resolved fluorescence spectra of a homogeneous mixture of dyes have be en obtained. The total image was acquired in only 1 s.