Patent ID: 8154731
Filing Date: 2012-04-10
Classification: G01J,G01N

Abstract:
1. A method for the assessment of at least one chemical or physical property of a fluid or powder sample comprising; establishing modulation means, said modulation means comprising an interferometer, wherein an optical path difference in the range of 10 to 10,000 microns is obtained through the movement of at least one optical component in said interferometer using a solid-state actuator, interferometer modulating light emitted from the sample, having interacted with the sample and/or being emitted to the sample, detecting modulated light in the NIR and/or the IR spectral region or a property derived from said modulated light on at least one detector, correlating the obtained information to the at least one chemical or physical property, and wherein information about modulated light is an interferogram, and where the interferogram contains information from the zero optical path difference or centre-burst.