Diffuse reflection spectrum analyzer of ultraviolet, visible and near-infrared on-line detection

Abstract

The invention discloses a diffuse reflection spectrum analyzer of ultraviolet, visible and near-infrared on-line detection, comprising a housing. A lighting system, a probe, an optical beam splitting system, a signal acquisition system, a correction system and a spectrum processing system are arranged in the housing, wherein the lighting system, the signal acquisition system, the correction system and the spectrum processing system are jointly connected with a power supply system. The lighting system is used for irradiating ray of ultraviolet, visible and near-infrared wave band to light a detected object; the probe is used for collecting the ray of the detected object after diffuse reflection and sends the collected ray to the optical beam splitting system; a grating is utilized to form light of different wavelengths by ray; the signal acquisition system converts the optical signal into a digital signal, and the digital signal is collected; and the spectrum corrected by the correction system is processed, analyzed and displayed by the spectrum processing system so as to determine a detection result. The invention has the advantages of wide application range and accurate measurement.

Description

Technical field: [0001] The invention relates to an ultraviolet, visible and near-infrared on-line detection diffuse reflectance spectrum analyzer, which is used for the analysis of liquid, solid and liquid with high light scattering. Background technique: [0002] Spectroscopic instruments are instruments for spectroscopic research and material spectral analysis. Through the measurement of spectra, the analysis of light components, the measurement of optical properties of materials and the identification of material components are completed. They are widely used in various optical detection and biochemical analysis. , industrial automation testing, astronomical research and other fields. [0003] Ultraviolet (UV) refers to electromagnetic waves with a wavelength in the range of 185-400 nm, which cannot be perceived by human eyes. Because the electronic spectra of most molecules are in the ultraviolet region, and the electronic spectra of molecules can basically determine t...

AI Technical Summary

Problems solved by technology

It is customary to divide the near-infrared region into near-infrared short-wave and near-infrared long-spectrum regions; around 1900, near-infrared (NIR) spectroscopy instruments used glass prisms and film recorders, and their spectral range was limited to 700nm-1600nm. The frequency multiplication and combined frequency absorption signals in this spectral region are weak, the bands overlap, and the analysis is complicated. Limited by the technical level at that time, the near-infrared spectrum "sleeped" for nearly a century and a half. It was not until the 1950s that the near-infrared spectroscopy technology began to Used in the analysis of agricultural and sideline products, the commercial near-infrared (NIR) spectrometer in the 1950s used lead sulfide photoresistors as detectors, and its wavelength range can reach 3000nm for quantitative analysis, but due to the low extinction coefficient of near-infrared (NIR) Due to the difficulty of analysis due to the spectral bandwidth, this technology has not been widely used. In the 1960s, the diffuse reflectance technology was used to study the moisture, protein and fat content of wheat, and the practical value of near-infrared (NIR) spectrum for routine analysis was found.

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