CN215448980U

CN215448980U - Portable near-infrared spectrometer front-end optical combined module

Info

Publication number: CN215448980U
Application number: CN202121726211.5U
Authority: CN
Inventors: 阳波; 王宝; 罗佳杰
Original assignee: Hunan Normal University
Current assignee: Hunan Normal University
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-01-07
Anticipated expiration: 2031-07-28

Abstract

The utility model relates to a front-end optical combined module of a portable near-infrared spectrometer, belonging to the technical field of auxiliary equipment of spectrometers. The optical module comprises a module body and a dismounting joint, wherein the module body is connected with the spectrometer through the dismounting joint. The dismounting joint is a plug joint or a threaded joint. Through the combination of these four kinds of modules of installation on the spectrum appearance, carry out scientific, effective, swift measurement to the spectrum of sample, have the advantage of installation swiftly, portable, provide a practical novel front end optical structure for portable spectrum appearance.

Description

Portable near-infrared spectrometer front-end optical combined module

Technical Field

The utility model relates to a front-end optical combined module of a portable near-infrared spectrometer, belonging to the technical field of auxiliary equipment of spectrometers.

Background

The hydrogen-containing groups in the organic molecules have stronger absorption in a near infrared light region, a large amount of information can be obtained by obtaining the near infrared spectrum of an organic matter sample, and the sample can be classified and identified by utilizing the information, so that the method has the advantages of convenience, high efficiency, quickness, no damage to the sample and the like. At present, some spectrometers abroad are provided with some auxiliary modules, and domestic near-infrared spectrometers only have a main part for collecting spectra, so that convenience and practicability are lacked in the practical application process. For example, before the spectrometer is used or after the spectrometer is used for a period of time, the standard white board must be scanned and calibrated again, and the standard white board is easy to damage and inconvenient to carry; when the spectrum is collected, the spectrum needs to be close to a sample, so that inconvenience is brought to collection; in addition, the interference of external light is also needed to be avoided during collection, and a relatively accurate spectrum can be obtained.

Currently, the methods for classifying substances using spectrometers are mostly only available in laboratories. The portable near-infrared spectrometer has the advantages of portability, quick measurement and the like, and has wide application prospect. However, most of the existing devices are in practical use and lack practicability. Because the sample quantity is more, can't guarantee during the collection that distance every time is suitable and do not have external disturbance. In addition, the form of the sample can also affect the collection of spectra, making it difficult to perform an effective and rapid measurement during use. Therefore, the current devices cannot meet the requirement of rapid spectrum collection in practical applications.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a front-end optical combined module of a portable near-infrared spectrometer, thereby overcoming the defects of the prior art.

The optical module comprises a module body and a dismounting joint, and the module body is connected with the spectrometer through the dismounting joint.

The optical module is a calibration module, and a standard white board is arranged at the front end of the module body. The calibration of the spectrometer is convenient. The light emitted by the spectrometer is reflected by the standard white board, and the total reflection spectrum can be obtained for calibration and calculating the reflectivity.

The optical module is a light path control module and comprises a divergent lens and a total reflection prism; the module body be the L type, total reflection prism sets up in the right angle department of module body, diverges the lens setting and connects between the right angle turning of module body and dismouting. The divergent lens is used for prolonging the focal length and increasing the measuring distance; the total reflection prism is used for changing the light path. The light emitted by the spectrometer passes through the lens, then the focal point is prolonged, and then the light is reflected by the total reflection prism, the propagation direction is changed, and finally the light is incident on a sample; thereby increasing the measuring distance of the spectrometer and changing the light path.

The optical module is a shielding module, and the front end of the module body is provided with a horn-shaped shielding plate. The horn-shaped front end opening is used for blocking external noise interference.

The optical module is a powdery solid measuring module, the front end of the module body is provided with a containing groove for containing powdery solid, and the connecting surface of the containing groove and the module body is transparent glass. Light emitted by the spectrometer enters the containing groove through transparent glass, and returns to the spectrometer after being reflected, so that the light is used for measuring powdery solids.

The dismounting joint is a plug joint or a threaded joint.

The utility model has the advantages that 1, the near-infrared spectrometer is quickly calibrated; 2. increasing the measurement distance of the spectrometer; 3. the interference of external natural light in the measuring process is reduced; 4. effectively collecting the spectrum of a powdery solid sample; 5. through the combination of these four kinds of modules of installation on the spectrum appearance, carry out scientific, effective, swift measurement to the spectrum of sample, have the advantage of installation swiftly, portable, provide a practical novel front end optical structure for portable spectrum appearance.

Drawings

FIG. 1 is a schematic diagram of a calibration module of a spectrometer.

FIG. 2 is a schematic diagram of an optical path control module of a spectrometer.

FIG. 3 is a schematic diagram of a blocking module of a spectrometer.

FIG. 4 is a schematic diagram of a powdered solids measurement module of the spectrometer.

Detailed Description

In order to facilitate those skilled in the art to understand the technical solution of the present invention, the following further describes a preferred embodiment of the present invention with reference to fig. 1 to 4, including a spectrometer 1, and further including a quick-detachable optical module 2, where the optical module 2 includes a module body 21 and a detachable connector 22, and the module body 21 is connected to the spectrometer 1 through the detachable connector 22.

The optical module 2 is a calibration module, and the front end of the module body 21 is provided with a standard white board 3. The calibration of the spectrometer 1 is facilitated. The light emitted by the spectrometer 1 is reflected by the standard white board 3, and a total reflection spectrum can be obtained for calibration and calculating the reflectivity.

The optical module 2 is a light path control module and comprises a divergent lens 4 and a total reflection prism 5; the module body 21 is L-shaped, the total reflection prism 5 is arranged at the right angle of the module body 21, and the divergent lens 4 is arranged between the right angle of the module body 2 and the dismounting joint 22. The divergent lens 4 is used for prolonging the focal length and increasing the measuring distance; the total reflection prism 5 is used to change the optical path. The light emitted by the spectrometer 1 passes through the lens, then the focal point is prolonged, and then the light is reflected by the total reflection prism 5, the propagation direction is changed, and finally the light is incident on a sample; thereby increasing the distance measured by the spectrometer 1 and changing the optical path.

The optical module 2 is a shielding module, and the front end of the module body 22 is provided with a horn-shaped shielding plate 6. The horn-shaped front end opening is used for blocking external noise interference.

Optical module 2 be powdered solid measuring module, the front end of module body 21 sets up the groove 7 that holds that is used for holding powdered solid, hold the groove 7 and be transparent glass 8 with being connected of module body 21. Light rays emitted by the spectrometer 1 enter the containing groove 7 through transparent glass, and return to the spectrometer 1 after being reflected, so that powdery solids can be measured.

The detachable joint 22 is a plug joint or a threaded joint.

In summary, the calibration module mainly comprises a standard white board 3, which facilitates calibration of the spectrometer 1; the light path control module consists of a divergent lens 4 and a total reflection prism 5, so that the measuring distance of the spectrometer 1 can be increased, the light path can be changed, and the instrument can be used more conveniently; the shielding module is a horn-shaped shielding plate 6 and is used for blocking external noise interference; the last solid measuring module is designed for measuring the near infrared spectrum of powdery solid and is provided with a containing groove 7 for containing powder. Therefore, the problems of calibration, distance measurement, interference of environmental noise and measurement of powdery solid in the use process of the portable spectrometer 1 are solved.

The four modules designed by the utility model can be used independently or in combination, so that more functions are realized, the connection is tight, and the integrity is strong. The protocol and use of the combinations that can be used are shown in table 1:

module 1	Module 2	Use of
			Optical path control	Shielding	The external interference can be effectively reduced while the light path is prolonged and the multi-angle measurement is realized
Optical path control	Solid measurement	The light path is prolonged, the pollution of the spectrometer caused by adding solid in a short distance is avoided, and the measurement is more convenient
			Optical path control	Standard white board	During calibration, the influence of light absorption in air and glass due to prolonged light path, which causes light intensity reduction, is eliminated

Table 1 module combination scheme.

The utility model has the advantages that the utility model can scientifically and effectively measure the spectra of samples of different types by installing the combination of the four modules on the portable spectrometer, and has good practicability; secondly, the four modules of the utility model have the advantages of quick installation and convenient carrying, and can quickly measure the sample; thirdly, the utility model can prolong the light path, increase the measurement distance of the portable spectrometer and provide a front-end optical structure of the portable spectrometer. In addition, the four modules in the utility model can obtain more functions in a combined mode, and the diversity of the structure is increased.

Claims

1. Portable near-infrared spectrometer front end optics composite module, including the spectrum appearance, its characterized in that: the optical module comprises a module body and a dismounting joint, and the module body is connected with the spectrometer through the dismounting joint.

2. The portable near-infrared spectrometer front-end optical combination module of claim 1, characterized in that:

the optical module is a calibration module, and a standard white board is arranged at the front end of the module body.

3. The portable near-infrared spectrometer front-end optical combination module according to claim 1 or 2, characterized in that:

the optical module is a light path control module and comprises a divergent lens and a total reflection prism; the module body is L-shaped, the total reflection prism is arranged at the right angle of the module body, and the divergent lens is arranged between the right angle corner of the module body and the dismounting joint;

the divergent lens is used for prolonging the focal length and increasing the measuring distance; the total reflection prism is used for changing the light path.

4. The portable near-infrared spectrometer front-end optical combination module according to claim 1 or 2, characterized in that:

the optical module is a shielding module, and the front end of the module body is provided with a horn-shaped shielding plate.

5. The portable near-infrared spectrometer front-end optical combination module according to claim 1 or 2, characterized in that:

the optical module is a powdery solid measuring module, the front end of the module body is provided with a containing groove for containing powdery solid, and the connecting surface of the containing groove and the module body is transparent glass.

6. The portable near-infrared spectrometer front-end optical combination module according to claim 1 or 2, characterized in that:

the dismounting joint is a plug joint or a threaded joint.