[A multichannel laser Raman spectral detecting system].

A multichannel laser Raman spectral detecting system is described. It consists of Ar+ laser, outer optics, polychrometer and optical multichannel analyzer (OMA II). Raman spectra of CCl4, C6H6 and C6-H12 were detected. Tests showed that the time required to acquire a Raman spectrum with this/multichannel system is greatly reduced, but the integral time per channel can be expanded to 10-50 s in contrast with a conventional single channel Raman spectrometer. When the working temperature of the multichannel detector is dropped to 5 degrees C, the Raman spectra with high signal to noise ratio, high sensitivity and good quality can be obtained. Processing Raman spectral curves with differential software, the Raman lines which are nearly submerged in Rayleigh line can be picked up.