Total luminescence spectrum plotter - has excitation and emission monochromator stages controlled by stepper motor and linked to X-Y plotter

摘要

A system for plotting the total luminescence spectrum of a sample comprises a spectroflourometer including excitation and emission monochromator stages. Its operating wavelengths are dependent on applied stepping pulses. An X-Y plotter has a marking pen synchronized for movement along X and Y axis with changes in the wavelengths of the monochromators. A control circuit generates pulses to incrementally step the emission monochromator and horizontally scan the marking pen. A level detection circuit monitors the output of the spectroflourometer and activates the pen upon attainment of a desired contour level. Limit circuitry incorporated in the control circuit momentarily actuates the excitation monochromator following each horizontal scan to increase the excitation wavelength for the subsequent scan to complete the plot.