Tm. Spudich et al., ACOUSTOOPTIC SIGNAL MODULATION FOR ATOMIC-EMISSION SPECTROMETRY BACKGROUND CORRECTION, Applied spectroscopy, 51(6), 1997, pp. 765-769
An acousto-optic diffraction device is mounted within a polychromator
to perform spectral shifting for the purpose of background correction
for atomic spectrometry. Controlling the applied frequency to the acou
sto-optic allows ''on-line'' and ''off-line'' spectral observations. P
reliminary investigations included characterization of the behavior of
the photomultiplier tube (PMT) signal output at various acoustic freq
uencies and applied powers to verify the applicability of the system.
Low-rate (0.1 Hz) frequency modulation was performed to successfully t
est the applicability of the background-correction system.