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Spectrum measurement method

A measurement method and spectral measurement technology, which is applied in the field of spectral information measurement, can solve problems such as the inability to separate the absorption spectrum and scattering spectrum of substances, and the inability to measure quantitatively, and achieve the effect of small error in measurement results

Active Publication Date: 2015-10-21
TSINGHUA UNIV
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Problems solved by technology

[0004] However, the existing spectrophotometer can only directly measure the reflection, transmission and fluorescence spectra of the substance, so the extinction spectrum of the substance can only be obtained indirectly, and the existing spectrophotometer cannot separate the absorption spectrum and scattering spectrum of the substance , so quantitative measurements of absorption and scattering spectra cannot be performed

Method used

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Embodiment Construction

[0038] The spectrum measurement system provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0039] see figure 1 , the first embodiment of the present invention provides a spectrum measurement system 100, the spectrum measurement system 100 includes a light source module 20, a chopper 6, a reference sample module 30, a reflection module 40, a sample cell 3 and a photoelectric Detection and processing unit 5. The light emitted by the light source module 20 is split by the chopper 6 to form two beams. One beam of light enters the photoelectric detection and processing unit 5 after passing through the reference sample module 30 ;

[0040] The light source module 20 is used to generate monochromatic light with a wavelength of λ. In this embodiment, the light source module 20 includes a light source 1 and a monochromator 2, and the light generated by the light source 1 passes through the monochromator 2 Produces monoch...

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Abstract

The present invention provides a spectrum measurement method, comprising the following steps: step S11, calibrating the spectrum measurement system; step S12, measuring the transmittance of the sample to be tested, and calculating the extinction spectrum of the sample to be tested; step S13, carrying the sample to be tested Measure in the reference sample cell and the sample cell; step S14, replace the sample to be measured in the reference sample cell and the sample cell with a standard sample, and calibrate the reflectivity of the second reflector, the reflectivity of the third reflector, The distance r between the sample to be tested and the photoelectric detection and processing unit and the transmittance of the attenuation sheet are calculated to obtain the scattering spectrum near 90° of the sample to be tested.

Description

technical field [0001] The invention relates to the field of spectral information measurement, in particular to a measurement method applied to the measurement of extinction spectrum, scattering spectrum and absorption spectrum information. Background technique [0002] With the continuous advancement of technology, people's measurement requirements for material extinction spectrum information are increasing day by day. In the past few decades, spectrophotometer has been widely used as an important scientific research instrument in the field of spectral measurement. Existing spectrophotometers mainly include three types: single-beam, double-beam and dual-wavelength. They are used in many industries, including semiconductor, laser and optical manufacturing, printing and forensic testing, and research of chemical substances in laboratories. [0003] Extinction spectrum includes scattering spectrum and absorption spectrum. With the continuous deepening of human research on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/44G01N21/31
CPCG01N2201/065
Inventor 徐宁汉白本锋谭峭峰金国藩
Owner TSINGHUA UNIV
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