Spectrum measuring method

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

Active Publication Date: 2014-01-08
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 ind

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Embodiment Construction

[0015] The spectrum measurement system provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0016] 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 light beams. One beam of light enters the photodetection and processing unit 5 after passing through the reference sample module 30; the other beam enters the sample cell 3 after being reflected by the reflection module 40, and enters the photodetection and processing unit 5 after passing through the sample cell 3.

[0017] The light source module 20 is used to generate monochromatic light with a wavelength of λ. In this embodiment...

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Abstract

The invention provides a spectrum measuring method. The spectrum measuring method comprises the following steps of calibrating a spectrum measuring system, measuring the transmittance of samples to be measured, computing an extinction spectrum of the samples to be measured, measuring the samples to be measured after loading the samples to be measured in a reference sample pool or a sample pool, converting the samples to be measured in the reference sample pool or the sample pool into standard samples, calibrating the reflectivity of a second reflection lens, the reflectivity of a third reflection lens, the distance r between the samples to be measured and a photoelectric detecting and processing unit, and the transmittance of a attenuation slice, and computing and obtaining the scattered spectrum of positions near 90 degrees of the samples to be measured.

Description

Technical field [0001] The present 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. In the past few decades, the spectrophotometer has been widely used as an important scientific instrument in the field of spectrum measurement. The existing spectrophotometers mainly include three types: single beam, dual beam and dual wavelength. They are widely used in many industries, including semiconductor, laser and optical manufacturing, printing and forensic inspection, and research on chemical substances in laboratories. [0003] Extinction spectra include scattering spectra and absorption spectra. With the continuous deepening of human research on the prope...

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Application Information

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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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