Raman spectrometer

A technology of Raman spectrometer and grating spectrometer, which is applied in the field of Raman spectrometer, can solve the problems of large volume, high cost, and large volume of the microscope, and achieve the effects of improving spectral resolution, reducing chromatic aberration and astigmatism, and high collection efficiency

Inactive Publication Date: 2015-03-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the three-grating Raman spectrometer also has the disadvantages of large size, low Raman signal transmission efficiency, and difficulty in debugging and maintenance.
The second is the confocal Raman spectrometer used in the laboratory. It uses a microscope to collect Raman signals and uses filters to filter out the interference of stray light. It can achieve confocal measurement. It has the advantages ...

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  • Raman spectrometer
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Embodiment Construction

[0033] exist figure 1 Among them, a Raman spectrometer, including a laser 1, a plasma filter 2, a laser power attenuator 3, a light entrance hole 4, a Raman signal acquisition device 5, an objective lens 6, a sample 7, an entrance slit 8, and a transmission grating Spectrometer 9, CCD10, fixed bottom plate 11. The laser 1, the plasma filter 2, the laser power attenuator 3, the Raman signal acquisition device 5, and the transmission grating spectrometer 9 are all fixed on the bottom plate.

[0034] exist image 3 Among them, the Raman signal acquisition device 5 includes a hollow cylindrical container 5-6 with two open ends, and the two open ends of the cylindrical container 5-6 are respectively provided with an objective lens 6, a focusing lens 5-5, an objective lens 6 and a focusing lens. Lens 5-5 is arranged with optical axis, is provided with optical filter 5-3 in the cylindrical container between objective lens 6 and focusing lens 5-5; Offers through hole on the side wal...

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Abstract

The invention relates to a raman spectrometer, which can be used for accurately qualitatively and half quantitatively analyzing a sample. The raman spectrometer comprises a laser, a raman signal acquisition device, a transmittance-type grating spectrometer, a plasma filter plate, a laser attenuation plate and a soleplate, wherein all the parts are fixed on the soleplate. The laser, the raman signal acquisition device and the transmittance-type grating spectrometer are fixed on a floor, and the raman spectrometer adopts transmittance-type coaxial optical-path design, so that the confocal measurement can be realized. The raman spectrometer has advantages of high light throughput, good spectral resolution, good stability and the like. The raman spectrometer is applicable to various excitation light sources of ultraviolet light, visible light, near-infrared light and the like.

Description

technical field [0001] The invention relates to a Raman spectrometer. As an analysis instrument, the composition of a substance can be analyzed by collecting the Raman spectrum of a sample. Background technique [0002] Raman spectroscopy, known as molecular fingerprinting, allows fast and accurate analysis of samples. Raman spectroscopy has a wide range of applications and can be used in food, security, physical evidence, minerals, environment, chemistry, materials, biology, oceans and other fields. Sample types include solid, powder, liquid, gas, interface, colloid and other forms. At present, the importance of Raman spectroscopy is gradually being recognized by everyone, and its application is becoming more and more extensive. [0003] The principle of Raman spectroscopy is: a photon interacts with a molecule. If the energy of the molecule absorbing the photon transitions from a low energy level in a vibration or rotational state to a high energy level, then according t...

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Application Information

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IPC IPC(8): G01N21/65G01J3/44
Inventor 李灿黄保坤冯兆池李光亚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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