Direct measurement of the constituents flow field by the spontaneous Raman imaging technique (I)
A spontaneous Raman imaging system has been described which can monitor the constituents of the flow field in real time. We present the results of the species in the atmosphere with a doubled Nd:YAG laser and a single intensified CCD array at the exit of an imaging spectrograph. The output laser energy and the position of the measurement point affect the accuracy of the measurement. The error is calculated to be less than 8%. The measurement precision of O 2(a 1Δ) concentration will be improved largely when the spontaneous Raman imaging technique is applied to monitor chemical oxygen iodine laser singlet oxygen generator performance.