Detection instrument sharing light source
By designing a detection instrument with a shared light source and using a xenon lamp to detect fluorescence and absorption spectrum, the high cost and space requirements of independent systems in the prior art are solved, and more efficient integration of detection equipment and cost reduction are achieved.
Patent Information
- Application Number
- CN202421534904.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-01
AI Technical Summary
In the prior art, the detection methods of fluorescence and absorption spectra are different, resulting in fluorescence and absorption spectra being usually detected as independent systems, and failing to integrate the optical path, resulting in the need of two xenon lamps, increasing cost and space requirements.
A detection instrument with a shared light source is designed. By setting the first optical path path and the second optical path path, a xenon lamp is used to detect the fluorescence and absorption spectrum, and a first optical path path composed of a filter and a photomultiplier tube, and a second optical path path composed of an optical fiber and a spectrometer, the shared and flexible adjustment of light is achieved.
On the basis of sharing a light source, the detection of fluorescence and absorption spectrum is realized, reducing costs and space requirements, and improving the integration and efficiency of the detection equipment.
Smart Images
Figure CN222825449U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of detection instruments, and in particular relates to a detection instrument with a shared light source. Background Art
[0002] The emission spectrum range of the xenon lamp is 190-1100nm. In the prior art, both fluorescence and absorption spectra can be detected using xenon lamps as light sources. Specifically, the fluorescence spectrophotometer can use the light emitted by the xenon lamp to shine on the sample after passing through a filter and then be received by the detector, and then displayed in the form of a graph or digital; the ultraviolet visible absorption spectrum also uses a xenon lamp as a light source. The light emitted by the xenon lamp passes through the sample and reaches the spectrometer, which converts the optical signal into an electrical signal and amplifies it. The amplified electrical signal is then displayed or recorded.
[0003] Although xenon lamps can be used as light sources for both fluorescence and absorption spectroscopy, due to the different detection methods of the two, existing technologies often treat fluorescence and absorption spectroscopy as independent systems without integrating the optical path. To achieve both fluorescence and absorption spectroscopy functions, two xenon lamps are required. An additional xenon lamp is costly, resulting in a higher price for the instrument, and the space required for the two instruments will also be larger. Utility Model Content
[0004] In view of the deficiencies in the prior art, the present invention provides a detection instrument with a common light source to solve the problem that both fluorescence and absorption spectra can use xenon lamps as light sources. However, due to the different detection methods of the two, the prior art often treats fluorescence and absorption spectra as independent systems without integrating the optical path.
[0005] According to the embodiment of the utility model, the utility model adopts the following technical solution:
[0006] A detection instrument with a shared light source comprises a light source, a first light path and a second light path, wherein the first light path comprises a first filter, a cuvette slot for placing a first sample, a second filter and a photomultiplier tube which are arranged in sequence, an entrance hole and a first exit hole are provided on the side wall of the cuvette slot, light emitted by the light source passes through the first filter and the entrance hole in sequence and then irradiates the first sample in the cuvette slot, and enters the photomultiplier tube after passing through the first exit hole and the second filter, and the first filter is movably arranged; the second light path comprises an optical fiber, a platform for placing a second sample and a spectrometer, a second exit hole is provided on the side wall of the cuvette slot, the optical fiber is arranged at the second exit hole, light emitted by the light source passes through the entrance hole and the second exit hole and then enters the optical fiber, and is transmitted to the second sample on the platform through the optical fiber and then enters the spectrometer.
[0007] Compared with the prior art, the utility model has the following beneficial effects:
[0008] In this solution, on the premise of sharing a light source, a first optical path and a second optical path are set. The detection of the first sample requires the light source to pass through the first filter and the second filter and then enter the photomultiplier tube. The first filter is movably set. When detecting the second sample, the first filter can be adjusted not to be at the entrance hole, so that the light source directly enters the optical fiber through the entrance hole and the second exit hole. In addition, the second filter is set at the first exit hole, which will not affect the detection of the second sample.
[0009] By setting the first optical path and the second optical path and sharing a light source, two detection devices are combined into one, thereby reducing costs.
[0010] Furthermore, an excitation wheel and an emission wheel are rotatably connected to the outer wall of the cuvette slot, and a plurality of first mounting holes are circumferentially opened on the excitation wheel, in which the first filter is installed, and the first mounting hole is used to align with the entrance hole, and the first filter is not installed in one of the first mounting holes; a plurality of second mounting holes are circumferentially opened on the emission wheel, in which the second filter is installed, and the second mounting hole is used to align with the first exit hole.
[0011] Furthermore, the axis of the exciting wheel and the axis of the emitting wheel are perpendicular to each other.
[0012] Furthermore, it also includes a first driving member for driving the exciting wheel to rotate and a second driving member for driving the transmitting wheel to rotate.
[0013] Furthermore, a first gear is fixed to the outer wall of the excitation wheel, and the first driving member includes a first driving wheel rotatably connected to the side wall of the cuvette slot and meshing with the first gear for transmission; a second gear is fixed to the outer wall of the emission wheel, and the second driving member includes a second driving wheel rotatably connected to the side wall of the cuvette slot and meshing with the second gear for transmission.
[0014] Furthermore, the axes of the entrance hole and the second exit hole are arranged to coincide with each other, and the end of the optical fiber is arranged at the axis of the second exit hole.
[0015] Furthermore, a first mounting plate is installed on the side of the excitation wheel facing away from the cuvette slot, the light source comprises a xenon lamp detachably connected to the first mounting plate, a first through hole is formed on the first mounting plate, and the axes of the first through hole and the entrance hole coincide with each other.
[0016] Furthermore, a second mounting plate is installed on the side of the transmitting wheel facing away from the cuvette slot, the photomultiplier tube is detachably connected to the second mounting plate, a second through hole is opened on the second mounting plate, and the axis of the second through hole coincides with the axis of the first outlet hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.
[0018] Figure 2for Figure 1 The side view with the excitation wheel as the front side is shown, and the light source and the first mounting plate are not shown.
[0019] Figure 3 for Figure 1 The side view with the transmitting wheel as the front is shown, and the photomultiplier tube and the second mounting plate are not shown.
[0020] Figure 4 It is a structural schematic diagram of the cuvette tank in the embodiment of the utility model.
[0021] In the figure: 1. light source; 2. first mounting plate; 3. second mounting plate; 4. photomultiplier tube; 5. excitation wheel; 6. first mounting hole; 7. emission wheel; 8. second mounting hole; 9. first gear; 10. second gear; 11. cuvette slot; 12. optical fiber; 13. second exit hole; 14. platform; 15. spectrometer; 16. first driving wheel; 17. second driving wheel; 18. fixed bracket; 19. entry hole; 20. first exit hole. DETAILED DESCRIPTION
[0022] The utility model is further described in detail below with reference to the accompanying drawings, and specific implementation methods are given.
[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a detection instrument with a shared light source includes a light source 1, a first light path and a second light path. The first light path includes a first filter, a cuvette slot 11 for placing a first sample, a second filter and a photomultiplier tube 4 which are arranged in sequence. An entrance hole 19 and a first exit hole 20 are provided on the side wall of the cuvette slot 11. During specific detection, the first sample is placed in the cuvette, and the cuvette is placed in the cuvette slot 11. The light emitted by the light source 1 passes through the first filter and the entrance hole 19 in sequence and then irradiates the first sample located in the cuvette slot 11, stimulating the fluorescent substance in the first sample to emit fluorescence. The fluorescence passes through the first exit hole 20 and the second filter and enters the photomultiplier tube 4, amplifying the light intensity and converting it into electrical energy, which is then expressed in the form of a picture or a number, thereby completing the fluorescence detection of the first sample.
[0024] In order to prevent the first filter from obstructing the second optical path, the first filter is movably arranged. Specifically, in this embodiment, the outer wall of the cuvette slot 11 is rotatably connected with the excitation wheel 5 and the emission wheel 7. In the actual design process, a fixed bracket 18 for mounting the cuvette slot 11 can also be provided, and the excitation wheel 5 and the emission wheel 7 are both rotatably connected to the fixed bracket 18. Accordingly, the fixed bracket 18 needs to be provided with through holes corresponding to the entrance hole 19 and the first exit hole 20, respectively. Figure 2As shown, a plurality of first mounting holes 6 are provided along the circumference of the excitation wheel 5, and the first optical filter is installed in the first mounting hole 6. The first mounting hole 6 is used to align with the entry hole 19. In the actual design process, first optical filters with different transmission wavelengths can be installed in the plurality of first mounting holes 6. Then, by rotating the excitation wheel 5, different first optical filters can be used for different detections. The first optical filter is not installed in one of the first mounting holes 6, that is, one of the first mounting holes 6 is an empty hole. When the empty hole is aligned with the entry hole 19, the light from the light source 1 will not be obstructed by the first optical filter.
[0025] Combination Figure 3 As shown, a plurality of second mounting holes 8 are provided on the emitting wheel 7 along the circumference, and the second optical filters are installed in the second mounting holes 8. The second mounting holes 8 are used to align with the first outlet hole 20. In the actual design process, second optical filters with different transmission wavelengths can be installed in each second mounting hole 8. Then, by rotating the emitting wheel 7, different second optical filters can be used for different detections, and by cooperating with the first optical filter and the second optical filter, fluorescence detections with various different requirements can be completed.
[0026] In this embodiment, the axis of the excitation wheel 5 and the axis of the emission wheel 7 are perpendicular to each other, that is, the excitation wheel 5 and the emission wheel 7 are located on two adjacent side walls of the cuvette slot 11. This design can prevent the light entering from the first filter from affecting the light going out from the second filter, making the detection more accurate. At the same time, the emission wheel 7 will not hinder the transmission of the second optical path, and the second filter can be installed in the second mounting hole 8 on the emission wheel 7.
[0027] A detection instrument with a common light source 1 also includes a first driving member for driving an excitation wheel 5 to rotate and a second driving member for driving an emission wheel 7 to rotate. Specifically, a first gear 9 is fixed to the outer wall of the excitation wheel 5, and the first driving member includes a first driving wheel 16 that is rotatably connected to the side wall of a cuvette slot 11 and meshes with the first gear 9 for transmission. In the actual design process, when a fixed bracket 18 is designed, the first driving wheel 16 is rotatably connected to the fixed bracket 18. A second gear 10 is fixed to the outer wall of the emission wheel 7, and the second driving member includes a second driving wheel 17 that is rotatably connected to the side wall of the cuvette slot 11 and meshes with the second gear 10 for transmission. In the actual design process, when a fixed bracket 18 is designed, the second driving wheel 17 is rotatably connected to the fixed bracket 18. Through gear transmission, it is convenient to drive the excitation wheel 5 or the emission wheel 7 to rotate, thereby adjusting the first filter aligned with the entrance hole 19 or adjusting the second filter aligned with the first exit hole 20.
[0028] A first mounting plate 2 is installed on the side of the excitation wheel 5 facing away from the cuvette slot 11. Specifically, a rotating shaft is installed between the first mounting plate 2 and the side wall of the cuvette slot 11, and the excitation wheel 5 is rotatably connected to the rotating shaft. The light source 1 includes a xenon lamp detachably connected to the first mounting plate 2. Specifically, the xenon lamp is bolted to the first mounting plate 2. At the same time, a motor for driving the first driving wheel 16 to rotate is also installed on the first mounting plate 2. In order to prevent the first mounting plate 2 from obstructing the propagation of light from the light source 1, a first through hole is opened on the first mounting plate 2, and the axis of the first through hole and the entrance hole 19 coincide.
[0029] A second mounting plate 3 is installed on the side of the transmitting wheel 7 facing away from the cuvette tank 11. Specifically, a rotating shaft is installed between the second mounting plate 3 and the side wall of the cuvette tank 11, and the transmitting wheel 7 is rotatably connected to the rotating shaft. The photomultiplier tube 4 is detachably connected to the second mounting plate 3. Specifically, the photomultiplier tube 4 is bolted to the second mounting plate 3. At the same time, a motor for driving the second driving wheel 17 to rotate is also installed on the second mounting plate 3. In order to prevent the second mounting plate 3 from obstructing the propagation of fluorescence, a second through hole is opened on the second mounting plate 3. The axis of the second through hole coincides with the axis of the first outlet 20, and the fluorescence inlet of the photomultiplier tube 4 is also connected to the second through hole.
[0030] The second optical path includes an optical fiber 12, a platform 14 for placing a second sample, and a spectrometer 15. A second exit hole 13 is provided on the side wall of the cuvette tank 11, and a through hole corresponding to the second exit hole 13 is provided on the fixed bracket 18. In order to avoid obstruction of the light emitted by the light source 1 from entering the optical fiber 12, the axis of the entry hole 19 and the second exit hole 13 are arranged to coincide with each other, and the optical fiber 12 is arranged at the second exit hole 13. Specifically, the end of the optical fiber 12 is arranged at the axis of the second exit hole 13. During the specific detection, the second sample is placed in the cuvette, and the cuvette is placed on the platform 14, and the excitation wheel 5 is rotated so that the first mounting hole 6 without the first filter installed is aligned with the entry hole 19, that is, the empty hole is aligned with the entry hole 19, and no cuvette is placed in the cuvette tank 11, that is, the cuvette tank 11 is empty. The light emitted by the light source 1 enters the optical fiber 12 after passing through the entrance hole 19 and the second exit hole 13. That is, the light moves in a straight line when passing through the entrance hole 19 and the second exit hole 13, and is completely unobstructed, and can directly enter the optical fiber 12 located at the second exit hole 13. Then the light is transmitted to the platform 14 through the optical fiber 12, and irradiates the second sample on the platform 14. Part of the light is absorbed by the second sample, and the unabsorbed light enters the spectrometer 15 along the optical fiber 12. The spectrometer 15 converts the light energy into electrical energy and displays it in the software, thereby completing the absorption spectrum detection.
[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A detection instrument with a shared light source, characterized in that: The invention comprises a light source, a first optical path and a second optical path. The first optical path comprises a first filter, a cuvette slot for placing a first sample, a second filter and a photomultiplier tube which are arranged in sequence. An entrance hole and a first exit hole are provided on the side wall of the cuvette slot. Light emitted by the light source passes through the first filter and the entrance hole in sequence and then irradiates the first sample in the cuvette slot, and then enters the photomultiplier tube after passing through the first exit hole and the second filter. The first filter is movably arranged. The second optical path comprises an optical fiber, a platform for placing a second sample and a spectrometer. A second exit hole is provided on the side wall of the cuvette slot. The optical fiber is arranged at the second exit hole. Light emitted by the light source passes through the entrance hole and the second exit hole and then enters the optical fiber, and then enters the spectrometer after being transmitted to the second sample on the platform through the optical fiber.
2. The common light source detection instrument according to claim 1, characterized in that: An excitation wheel and an emission wheel are rotatably connected to the outer wall of the cuvette slot, a plurality of first mounting holes are circumferentially provided on the excitation wheel, a first filter is mounted in the first mounting hole, the first mounting hole is used to align with the entrance hole, and the first filter is not mounted in one of the first mounting holes; a plurality of second mounting holes are circumferentially provided on the emission wheel, a second filter is mounted in the second mounting hole, the second mounting hole is used to align with the first exit hole.
3. The common light source detection instrument according to claim 2, characterized in that: The axis of the exciting wheel and the axis of the transmitting wheel are perpendicular to each other.
4. The common light source detection instrument according to claim 2, characterized in that: It also includes a first driving member for driving the exciting wheel to rotate and a second driving member for driving the launching wheel to rotate.
5. The common light source detection instrument according to claim 4, characterized in that: A first gear is fixed on the outer wall of the excitation wheel, and the first driving member includes a first driving wheel rotatably connected to the side wall of the cuvette slot and meshing with the first gear for transmission; a second gear is fixed on the outer wall of the emission wheel, and the second driving member includes a second driving wheel rotatably connected to the side wall of the cuvette slot and meshing with the second gear for transmission.
6. The common light source detection instrument according to claim 1, characterized in that: The axes of the entrance hole and the second exit hole are arranged to coincide with each other, and the end of the optical fiber is arranged at the axis of the second exit hole.
7. The common light source detection instrument according to claim 2, characterized in that: A first mounting plate is installed on the side of the excitation wheel facing away from the cuvette slot. The light source comprises a xenon lamp detachably connected to the first mounting plate. A first through hole is provided on the first mounting plate. The axes of the first through hole and the entrance hole coincide with each other.
8. The common light source detection instrument according to claim 2, characterized in that: A second mounting plate is installed on the side of the transmitting wheel facing away from the cuvette slot, the photomultiplier tube is detachably connected to the second mounting plate, a second through hole is opened on the second mounting plate, and the axis of the second through hole coincides with the axis of the first outlet hole.