Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1976-05-04
1977-07-26
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
346 33A, 356 85, 356 96, 356100, G01N 2100, G01J 342
Patent
active
040379604
ABSTRACT:
In a recording spectrophotometer the ordinate of the plotter-scriber is controlled by the 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 aother mode, the controller furnishes a stepping signal of selected periodicity, for application to a stepping motor, which changes the wavelength adjustment of the spectrophotometer at a rate determined by the selected periodicity. The spectrophotometer furnishes to the plotter-scriber an analog voltge varying with the instantaneous wavelength setting of the spectrophotometer, so that the abscissa of the plotter-scriber correspondingly varies with the instantaneous value of the wavelength.
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.
REFERENCES:
patent: 2971429 (1961-02-01), Howerton
patent: 3563656 (1971-02-01), Helms
Baxter Travenol Laboratories Inc.
Collins Henry W.
Kinney Richard G.
McGraw Vincent P.
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