Fullhyphen;photonhyphen;counting Rayleigh spectrometer: a correlation and/or fast Fourier transform instrument

摘要

A fast, flexible, and relatively inexpensive minicomputer based Rayleigh spectrometer has been constructed. This spectrometer can utilize photon pulses in a most efficient way by performing autocorrelation and/or FFT with any desired number of channels. Its capability has been demonstrated by measuring large latex particles, small sodium dodecyl sulfate micelles, and a polydisperse latexhyphen;ggr;hyphen;globulin system. Detailed timing diagrams and circuit schematics are also included.