G - Physics – 01 – N
Patent
G - Physics
01
N
234/1, 73/55
G01N 21/00 (2006.01) G01J 3/06 (2006.01) G01J 3/42 (2006.01)
Patent
CA 1050783
ABSTRACT In a recording spectrophotometer the ordinate of the plotter-scriber is controlled by she output of a photomultiplier while the abscissa of the plotter-scriber is controlled by a selectable mode manually adjusted controller. In one mode, the controller furnishes a time base signal of selected rate of change, so that the abscissa of the plotter- scriber varies with the passage of time in accordance with said rate of change. In another mode, the controller furnishes a stepping signal of selected periodicity, for application to n stepping motor, which changes the wavelength adjustment of the spectro- photometer at a rote determined by the selected periodicity. The spectrophotometer furnishes to the plotter-scriber an analog voltage varying with the instantaneouw wavelength setting of the spectrophotometer, so that the abscissa of the plotter-scriber correspondingly varies with the instantaneous value of the wave- length A common manually adjusted digital setting means is used for adjusting either the said selected rate of change of the time base or the said selected periodicity of the stepping signal. -2-
259414
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