Spectrometry and optical method and apparatus for obtaining a st

Details Spectrometry and optical method and apparatus for obtaining a st Spectrometry and optical method and apparatus for obtaining a st

1996-05-10

1998-05-12

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrophotometer

25033907, 25033909, G01N 2100

Patent

active

057514186

ABSTRACT:
In an optical measuring apparatus of the present invention, a spectroscopic optical system emits a measuring light beam that contains a measure light component of a measure wavelength domain where a measured object absorbs part of the light and a reference light component of a reference wavelength domain where the measured object almost completely absorbs the light, and separates the beam into beams, a photometric unit measures the light incident on an integrating sphere when a reference sample is inserted in the light path and stores the measurements in a memory and also measures the light incident on an integrating sphere when a measured object is inserted in the light path, and an arithmetic circuit calculates a light intensity ratio of the compensation light component for the measured object to the compensation light component stored in memory and then estimates background intensities during the measurement by multiplying the measurements stored in the memory by the intensity ratio.

REFERENCES:
patent: 4097743 (1978-06-01), Carlson
patent: 5121337 (1992-06-01), Brown

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