Densitometer
AssigneeShimadzu Corporation
InventorHiroshi Yamamoto
Life of this patent
Estimating the term…
Abstract
A densitometer wherein a sample to be measured is illuminated and the light transmitted through or reflected by the sample is passed through a slit and dispersed by a dispersing element so that a spectral image of the sample as defined by the slit is formed on the image plane of the dispersing element. A plurality of image sensors each comprising a linear array of photodiodes are disposed on the image plane in such a manner that each of the image sensors substantially conform to one of the images of the slit formed by different wavelengths. The outputs from the photodiodes are processed by a computer to provide desired information about the sample.
Claims5
A densitometer comprising:
- means for supporting a sample to be measured;
- an entrance slit adjacent said sample supporting means;
- means for illuminating said sample and projecting an image of said sample onto said slit;
- means for spectrally dispersing an image section, passing through and defined by said slit, into corresponding spectral lines on an image plane;
- and
- at least one photodiode linear array disposed on said image plane so as to substantially conform to a particular one of said spectral lines at a particular frequency, such that each diode of said linear array receives and senses an amount of light of a corresponding segment of said particular spectral line and outputs a signal level accordingly to a computer for processing said signal levels;
- whereby a density measurement of said image section;
- at at least one frequency, is provided.
Dependencies are inferred from the claim text.