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Improved method and apparatus for sensing or determining one or more properties or the identity of a sample
Improved method and apparatus for sensing or determining one or more properties or the identity of a sample
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机译:用于感测或确定样品的一个或多个特性或身份的改进的方法和设备
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摘要
In a method wherein sets of measured values of the intensity of electromagnetic radiation, which has been subject to optical interference, absorption or scatter by a sample, are correlated with different sets of known values derived from either a model of the optical properties of the sample, or from an analogue technique, correlation is by means of either a zero dependent correlation function, or a normalised residual function. Both functions are unaffected by gain factors, thereby avoiding any need to determine and to maintain absolute sensitivities of optical detectors; provide greater variation of correlation than with techniques employing a conventional correlation coefficient, thereby increasing the precision with which the optimum correlation can be determined, especially when either the measured values, or known values are subject to error; enable the method to be carried out with only two radiation components; and can enable a reduction in computing time.
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