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Ultraviolet and visible spectrophotometer

A spectrophotometer and ultraviolet technology, which is used in the analysis of materials, measurement of color/spectral properties, and material analysis by optical means. precise effect

Pending Publication Date: 2020-05-05
中山大学新华学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current UV-Vis spectrophotometer is mainly used to detect the absorbance of the liquid sample to be tested, and the whole process needs to be sealed during the detection, and the analysis time of a single sample in the whole band is relatively long, usually 2 minutes

Method used

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  • Ultraviolet and visible spectrophotometer
  • Ultraviolet and visible spectrophotometer

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Embodiment 1

[0021] Such as Figure 1-2 Shown, a kind of ultraviolet-visible spectrophotometer comprises light source 1, lens 2, optical fiber 3, collimating mirror, light-shielding cap 4, integrating sphere 5 and spectrometer 6, and described light source 1 emits wavelength in the range of 200nm-1000nm, so The light emitted by the light source 1 passes through the lens 2 and enters from one end of the optical fiber 3. The other end of the optical fiber 3 is provided with a collimating mirror, and the light-shielding cap 4 is arranged outside the collimating mirror. The mirror emits in parallel and enters the sample to be tested. After the light is emitted from the sample to be tested, it is collected by the integrating sphere 5 and transmitted to the spectrometer 6 for analysis.

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Abstract

The invention provides an ultraviolet and visible spectrophotometer which comprises a light source, a lens, an optical fiber, a collimating mirror, a shading cap, an integrating sphere and a spectrometer. The light emitting wavelength of the light source is within the range of 200 nm to 1000 nm. The light emitted by the light source passes through the lens and then enters from one end of the optical fiber, the other end of the optical fiber is provided with the collimating mirror, the shading cap is arranged between the collimating mirror and a sample to be detected, the light is transmitted by the optical fiber and then is emitted from the collimating mirror in parallel and enters the sample to be detected, and the light is emitted from the sample to be detected and received by the integrating sphere and transmitted to the spectrometer for analysis. The absorbance of a solid sample and a liquid sample can be measured, the shading cap can reduce the influence of ambient light on the instrument, a light path does not need to be sealed in the whole detection process, external light has no influence on the instrument, use is convenient, and data is stable and accurate. Any wave band or full wave band can be analyzed, and tests prove that the integral measurement time is shorter than 1.5 s and the measurement speed is high.

Description

technical field [0001] The invention relates to the field of spectrophotometers, in particular to an ultraviolet-visible spectrophotometer. Background technique [0002] Ultraviolet-visible spectrophotometry is a method for measuring the absorbance of substances in the wavelength range of 200-760nm, which is used for identification, impurity inspection and quantitative determination. When light passes through the substance to be measured, the degree of absorption of light by the substance varies with the wavelength of the light. Therefore, by measuring the absorbance of the substance at different wavelengths, and drawing the relationship between the absorbance and the wavelength, the absorption spectrum of the measured substance can be obtained. From the absorption spectrum, the maximum absorption wavelength λmax and the minimum absorption wavelength λmin can be determined. The absorption spectrum of a substance has characteristics related to its structure. Therefore, a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/33G01N21/01
CPCG01N21/31G01N21/33G01N21/01G01N2021/0112
Inventor 魏洁书
Owner 中山大学新华学院
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