Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1979-04-06
1981-06-16
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356 41, 356303, 356308, G01J 334, G01N 3348
Patent
active
042734428
ABSTRACT:
A spectral photometer emits light towards an object of interest, receives e light reflected back from the object of interest, and includes a timer or synchronizer operative for causing the spectral photometer to produce an output signal whose successive values correspond to the intensity of the spectrum derived from the object of interest at successive wavelengths. The spectral photometer output signal is applied to an oscilloscope for display of the thusly generated spectrum. The oscilloscope screen is provided with interpretation marks at characteristic points of the displayed spectrum, either by providing such marks on a transparent plate mounted in front of the screen, or by applying to the oscilloscope signals causing the scope itself to generate these marks. These marks may be curves shaped and located to be intersected by both maxima of an oxygenated-hemoglobin spectrum irrespective of the degree of oxygenation. The distance between the interpretation marks automatically provided can be automatically measured to generate an indication of their wavelength difference. The interpretation marks can also be in the form of a complete reference or comparison spectrum, selected out from a storage storing a plurality of such reference spectra, and applied as a signal to the scope to effect superimposed display of both the spectrum derived from the spectral photometer and the selected reference spectrum.
REFERENCES:
patent: 2480636 (1949-08-01), Dieke
patent: 2630736 (1953-03-01), Beitz
patent: 3012467 (1961-12-01), Rosenthal
patent: 3829218 (1974-08-01), Alyanak
patent: 4146332 (1979-03-01), Moore
Max Planck Gesellschaft zur Forderung der Wissenschaften e.V.
McGraw Vincent P.
Striker Michael J.
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