Abstract: The present disclosure provides a method for correcting a light intensity measurement value is provided. The method includes: emitting detection light into a measured object; measuring a light intensity measurement value at a measurement position, and measuring light intensity of photons at a benchmark position as a light intensity reference value. A sensitivity of the light intensity of photons to a concentration change of a specific substance in the measured object is less than or equal to a preset threshold, and a change rate of the light intensity at the measurement position with a concentration of the specific substance in the measured object is greater than a change rate of the light intensity at the benchmark position with the concentration of the specific substance; correcting the light intensity measurement value by using the light intensity reference value. The present disclosure further provides a concentration measurement device.

Abstract: A method of processing spectral data is disclosed and may include the steps of illuminating a medium to detect an inside particular component with light; obtaining a first spectral data for the medium at a first radial position and a second spectral data for the medium at a second radial position, wherein the first radial position and the second radial position are selected arbitrarily; and performing differential processing on the first spectral data and the second spectral data.

Abstract: A method of processing diffuse spectrum data may include: obtaining diffuse spectrum data of a medium to be detected at one or more first radial positions; and determining optical information caused by substantially only a variation in scattering characteristic of the medium to be detected and/or optical information caused by substantially only a variation in absorption characteristic of the medium to be detected at one or more second radial positions from the obtained diffuse spectrum data.

Abstract: A method of detecting a concentration of a target component by using a reference wavelength includes: defining a wavelength at which a light intensity is insensitive to the variation of the target component concentration as a reference wavelength for the target component; detecting spectra at both the reference wavelength and a further measuring wavelength; processing the spectrum detected at the further measuring wavelength, with the spectrum detected at the reference wavelength as an inner reference, to obtain a characteristic spectrum including specific information of the target component; building a calibration model between the characteristic spectrum and the concentration of the target component; and determining the concentration of the target component based on the calibration model.