Patent ID: 8368892
Filing Date: 2013-02-05
Classification: G01J,G01N

Abstract:
1. An apparatus, comprising: an optical source providing an optical beam; a splitter configured to split the optical beam into a sample beam and a reference beam; a sample path containing a sample material to be analyzed, said sample beam being directed through said sample path so as to interact with said sample material; a reference path containing a reference material, said reference beam being directed through said reference path so as to interact with said reference material; a disperser configured to receive said sample beam after it exits the sample path and to receive said reference beam after it exits the reference path, said disperser outputting a dispersed sample beam and a dispersed reference beam; a photodetector disposed to receive the dispersed sample beam and the dispersed reference beam and to output a first electrical signal comprised of data indicative of a spectra of the sample beam after it exits the sample path and a second electrical signal comprised of data indicative of a spectra of the reference beam after it exits the reference path; and a data processor configured to compare the first electrical signal to a predetermined reference value to calibrate the second electrical signal.