Simple USB spectrometer demonstration device

Abstract

The utility model provides a simple USB spectrometer demonstration device, which belongs to the technical field of spectral analysis and comprises a light source, a cassette, a support strip, a cuvette, a projection grating and a camera. The cassette is arranged on one side of the light source, and a slit is formed in the side face, facing the light source, of the cassette. The support strips are fixed on the inner wall of the cassette and are arranged along the length direction of the cassette. The cuvette is arranged on the supporting strip in a sliding manner, and a to-be-detected solution is stored in the cuvette. The projection grating is slidably arranged on the supporting strip and located on the side, away from the slit, of the cuvette. The camera is installed in the cassette and used for collecting spectral lines on the projection grating. According to the simple USB spectrograph demonstration device provided by the utility model, the positions of related components can be reasonably adjusted according to actual use requirements, the whole device is convenient to operate and can be repeatedly used, and the reference of results is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of spectrum analysis, and more specifically relates to a simple USB spectrometer demonstration device. Background Art

[0002] In the undergraduate and graduate teaching of optics-related majors in colleges and universities, spectral testing technology is a very important experimental content. However, commercial spectrometers are expensive and complex in structure, and are not suitable for large-scale public experimental courses. If a spectrometer teaching instrument with simple structure and low cost can be developed, which can intuitively demonstrate the principle of the spectrometer and display spectral images, and set up experimental projects by measuring the spectral information of samples, it will be a very beneficial supplement and auxiliary to the teaching content and means.

[0003] In the process of spectral analysis, components such as cuvettes and projection gratings are required, but the existing devices cannot be easily adjusted and are not convenient to operate, which affects the demonstration efficiency and teaching quality. Utility Model Content

[0004] The utility model aims to provide a simple USB spectrometer demonstration device, aiming to solve the problems of inconvenient adjustment and inconvenient operation.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a simple USB spectrometer demonstration device, including:

[0006] light source;

[0007] A dark box is arranged at one side of the light source, and a slit is arranged on the side of the dark box facing the light source;

[0008] A support bar, fixed on the inner wall of the dark box and arranged along the length direction of the dark box;

[0009] A cuvette is slidably disposed on the support bar, and a solution to be tested is stored in the cuvette;

[0010] A projection grating is slidably disposed on the support bar and is located on a side of the cuvette away from the slit;

[0011] A camera is installed in the dark box and is used to collect spectral lines on the projection grating.

[0012] In a possible implementation, the number of the support bars is two, and the two support bars are fixed on the inner wall of the dark box in parallel and at intervals.

[0013] In a possible implementation, the support bar is welded and fixed to the inner wall of the dark box.

[0014] In a possible implementation manner, scales are provided along the length direction of the support bar.

[0015] In a possible implementation manner, permanent magnets are fixed on both the cuvette and the projection grating, and the cuvette and the projection grating are adsorbed on the support bar by means of the permanent magnets.

[0016] In a possible implementation manner, a connection frame is provided on the outer sides of the cuvette and the projection grating, and the permanent magnet is fixed on the connection frame.

[0017] In a possible implementation manner, connection blocks are extended on both sides of the connection frame toward the support bar, and the connection blocks abut against the support bar.

[0018] In a possible implementation manner, the permanent magnet is disposed between the support bar and the connecting block.

[0019] In a possible implementation, a cover plate is detachably fastened on the top of the dark box.

[0020] In a possible implementation, a convex lens is placed in the dark box, and the convex lens is arranged between the slit and the cuvette.

[0021] The utility model provides a simple USB spectrometer demonstration device with the beneficial effect that: compared with the prior art, in the utility model, a dark box is arranged on one side of a light source, and a slit is arranged on the side of the dark box facing the light source. A support bar is fixed on the inner wall of the dark box and arranged along the length direction of the dark box. A cuvette is slidably arranged on the support bar. A projection grating is slidably arranged on the support bar and is located on the side of the cuvette away from the slit. A camera is installed in the dark box.

[0022] In actual application, the light emitted by the light source enters the dark box through the slit and is collimated. The collimated light passes through the cuvette and is finally collected by the camera after diffraction by the projection grating. The cuvette and the projection grating in the present application are both slidably arranged in the dark box. Through the above arrangement, the positions of the relevant components can be reasonably adjusted according to the requirements of actual use. The whole device is easy to operate and can be reused, which ensures the referenceability of the results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a simple USB spectrometer demonstration device provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the connection between the dark box and the support bar provided in an embodiment of the utility model.

[0026] In the figure: 1. dark box; 2. projection grating; 3. cuvette; 4. convex lens; 5. light source; 6. cover plate; 7. support bar; 8. camera; 9. permanent magnet. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] See also Figure 1 and Figure 2 Now, a simple USB spectrometer demonstration device provided by the utility model is described. A simple USB spectrometer demonstration device includes:

[0029] Light source 5, dark box 1, support bar 7, cuvette 3, projection grating 2 and camera 8. Dark box 1 is arranged on one side of light source 5, and a slit is provided on the side of dark box 1 facing light source 5. Support bar 7 is fixed on the inner wall of dark box 1 and arranged along the length direction of dark box 1. Cuvette 3 is slidably arranged on support bar 7, and the solution to be tested is stored in cuvette 3. Projection grating 2 is slidably arranged on support bar 7 and is located on the side of cuvette 3 away from slit. Camera 8 is installed in dark box 1, and is used to collect spectral lines on projection grating 2.

[0030] The utility model provides a simple USB spectrometer demonstration device with the beneficial effect that: compared with the prior art, in the utility model, a dark box 1 is arranged on one side of the light source 5, and a slit is arranged on the side of the dark box 1 facing the light source 5. The support bar 7 is fixed on the inner wall of the dark box 1 and arranged along the length direction of the dark box 1. The cuvette 3 is slidably arranged on the support bar 7. The projection grating 2 is slidably arranged on the support bar 7 and is located on the side of the cuvette 3 away from the slit. A camera 8 is installed in the dark box 1.

[0031] In actual application, the light emitted by the light source 5 enters the dark box 1 through the slit and is collimated. The collimated light passes through the cuvette 3 and is finally collected by the camera 8 after being diffracted by the projection grating 2. The cuvette 3 and the projection grating 2 in the present application are both slidably arranged in the dark box 1. Through the above arrangement, the positions of the relevant components can be reasonably adjusted according to the requirements of actual use. The whole device is easy to operate and can be reused, which ensures the referenceability of the results.

[0032] At present, the main optical methods for measuring solution concentration are refraction, optical rotation and light transmission. The refraction method measures the refractive index of a solution of known concentration, fits the relationship between the refractive index and the concentration, and then predicts the concentration of the solution by measuring the refractive index of a solution of unknown concentration. The optical rotation method measures the angle of deflection of light after passing through an optically active solution by rotating the analyzer to observe the change in light intensity in different directions, and measures the concentration of the liquid by establishing an empirical formula for concentration and optical rotation angle. The light transmission method uses the absorption of light by the solution to attenuate the intensity of the transmitted light. The degree of attenuation of the incident light has a certain functional relationship with the concentration of the solute in the solution, and the concentration is measured based on this functional relationship. When a beam of parallel light passes through a uniform solution, part of the light is absorbed by the solution; part of the light passes through the solution; and part of the light is reflected.

[0033] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1 The number of the support bars 7 is two, and the two support bars 7 are fixed on the inner wall of the dark box 1 in parallel and at intervals. The two support bars 7 are arranged in parallel, and in the embodiment, the two support bars 7 are fixed on two opposite inner walls of the dark box 1. The main function of the support bars 7 is to support the cuvette 3 and the projection grating 2. In the actual application process, the two support bars 7 are arranged at the same height.

[0034] The support bar 7 can be regarded as an L-shaped bar, one side of the support bar 7 is fixed to the inner wall of the dark box 1 , and the other side extends toward the middle of the dark box 1 to support the cuvette 3 and the projection grating 2 .

[0035] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1 , the support bar 7 is welded and fixed on the inner wall of the dark box 1. In order to ensure that the support bar 7 and the dark box 1 have effective connection strength and avoid a series of problems such as cracks between the support bar 7 and the dark box 1, the support bar 7 can be directly welded and fixed on the inner wall of the dark box 1. In the actual operation process, the support bar 7 and the dark box 1 are fixed by multi-point welding.

[0036] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1, scales are provided along the length direction of the support bar 7. The position of the cuvette 3 and the projection grating 2 relative to the dark box 1 is the key to ensure that the spectrum analysis can be effectively performed. More importantly, in the actual analysis process, different solutions may exist in the cuvette 3. Through multiple analyses, one of which is to hold the sample solution in the cuvette 3 and the other is to hold deionized water in the cuvette 3. Through the analysis and comparison of the two experiments, the light beam is diffracted into monochromatic light of different wavelengths after passing through the projection grating 2 to form a spectrum line, and the camera 8 collects the spectrum line to complete the comparison and analysis.

[0037] By setting scales on the support bar 7 , it can be ensured that the cuvette 3 is placed at the same position twice, thereby ensuring the accuracy of the final result.

[0038] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1 and Figure 2 , permanent magnets 9 are fixed on both the cuvette 3 and the projection grating 2, and the cuvette 3 and the projection grating 2 are adsorbed on the support bar 7 with the help of permanent magnets 9. In order to ensure that the cuvette 3 and the projection grating 2 can be stably positioned on the support bar 7 without a series of problems such as dislocation, permanent magnets 9 are fixed on both the cuvette 3 and the projection grating 2, and the support bar 7 is made of metal material. Through the above arrangement, it can be ensured that the cuvette 3 and the projection grating 2 can effectively ensure the stability of the relative position with the support bar 7 with the help of permanent magnets 9.

[0039] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1 and Figure 2 , the outer sides of the cuvette 3 and the projection grating 2 are provided with a connection frame, and the permanent magnet 9 is fixed on the connection frame. For a more detailed description, connection frames are provided on the outer sides of the cuvette 3 and the projection grating 2, respectively, and the connection frames are wrapped around the outer sides of the cuvette 3 and the projection grating 2. In order to ensure that the cuvette 3 and the projection grating 2 can be arranged perpendicular to the axis of the dark box 1, the connection frame is plugged into the dark box 1. After the connection frame is inserted into the dark box 1, the positions of the cuvette 3 and the projection grating 2 are determined. More importantly, the connection frame can ensure that the cuvette 3 and the projection grating 2 are perpendicular to the axis of the dark box 1.

[0040] The permanent magnet 9 is fixed on the outer side surface of the corresponding connection frame. By arranging the permanent magnet 9, the cuvette 3 and the projection grating 2 are positioned at the positions corresponding to the support bar 7, so that their positions can be kept stable.

[0041] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1 and Figure 2, connecting blocks are extended on both sides of the connecting frame toward the support bar 7, and the connecting blocks are against the support bar 7. For a more detailed description, connecting blocks are provided on both sides of the top of the connecting frame, and the connecting blocks extend outward from the connecting frame. In actual application, the connecting blocks are placed on the support bar 7, and the permanent magnet 9 is arranged between the support bar 7 and the connecting blocks. By making the permanent magnet 9 directly contact the support bar 7, the stability of the position of the cuvette 3 and the projection grating 2 is ensured.

[0042] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1 and Figure 2 , the permanent magnet 9 is arranged between the support bar 7 and the connecting block. The permanent magnet 9 can be directly bonded to the connecting block, thereby ensuring that there is enough connection force between the permanent magnet 9 and the connecting block, and also ensuring that the permanent magnet 9 will not fall off the connecting block.

[0043] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1 and Figure 2 The top of the dark box 1 is detachably buckled with a cover plate 6. In order to ensure that the dark box 1 can be in a dark environment and ensure that the camera 8 can effectively capture image information, a cover plate 6 is buckled on the top of the dark box 1. After the cover plate 6 is removed, the cuvette 3 and the projection grating 2 can be placed and replaced. When the operation is completed, the cover plate 6 can be covered again for subsequent analysis and judgment.

[0044] In some embodiments of a simple USB spectrometer demonstration device provided in this application, please refer to Figure 1 A convex lens 4 is placed in the dark box 1, and the convex lens 4 is arranged between the slit and the cuvette 3. The convex lens 4 is used to gather light to ensure the accuracy of the result.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A simple USB spectrometer demonstration device, characterized in that: include: light source; A dark box is arranged at one side of the light source, and a slit is arranged on the side of the dark box facing the light source; A support bar, fixed on the inner wall of the dark box and arranged along the length direction of the dark box; A cuvette is slidably disposed on the support bar, and a solution to be tested is stored in the cuvette; A projection grating is slidably disposed on the support bar and is located on a side of the cuvette away from the slit; A camera is installed in the dark box and is used to collect spectral lines on the projection grating.

2. A simple USB spectrometer demonstration device as claimed in claim 1, characterized in that: The number of the support bars is two, and the two support bars are parallel and fixed at intervals on the inner wall of the dark box.

3. A simple USB spectrometer demonstration device as claimed in claim 1, characterized in that: The support bar is welded and fixed on the inner wall of the dark box.

4. A simple USB spectrometer demonstration device as claimed in claim 1, characterized in that: Graduations are arranged along the length direction of the support bar.

5. A simple USB spectrometer demonstration device as claimed in claim 1, characterized in that: Permanent magnets are fixed on the cuvette and the projection grating, and the cuvette and the projection grating are adsorbed on the support bar by means of the permanent magnets.

6. A simple USB spectrometer demonstration device as claimed in claim 5, characterized in that: The outer sides of the cuvette and the projection grating are both provided with connection frames, and the permanent magnet is fixed on the connection frames.

7. A simple USB spectrometer demonstration device as claimed in claim 6, characterized in that: Connecting blocks are extended on both sides of the connecting frame in the direction of the supporting bar, and the connecting blocks are against the supporting bar.

8. A simple USB spectrometer demonstration device as claimed in claim 7, characterized in that: The permanent magnet is arranged between the support bar and the connecting block.

9. A simple USB spectrometer demonstration device as claimed in claim 1, characterized in that: The top of the dark box is detachably buckled with a cover plate.

10. A simple USB spectrometer demonstration device as claimed in claim 1, characterized in that: A convex lens is placed in the dark box, and the convex lens is arranged between the slit and the cuvette.

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