Synthetic LED coaxial light source device and detection system
By using synthetic LED lamp sets and post-spectroscopic detection technology in the LED coaxial light source device, the thermal effect of halogen lamp sources and the wavelength drift of LED light sources are solved, and high sensitivity multi-wavelength detection and reduced misjudgment phenomena are achieved.
Patent Information
- Application Number
- CN202420514726.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-16
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-03-16
AI Technical Summary
In the prior art, halogen lamps as light sources have thermal effects that affect test stability and reagent fidelity, and have short life, troublesome maintenance and high cost; while the use of LED multi-wavelength color combination light sources requires subsequent narrowband spectroscopic detection, resulting in complex system, high cost and reduced detection sensitivity, and LED light sources are susceptible to temperature influence, resulting in wavelength drift and power changes.
A synthetic LED coaxial light source device is adopted, including an LED lamp group, a reference module, a beam shaping optical path and a power supply module. The LED lamp group consists of monochrome LEDs and white LEDs, with a wavelength range covering 340nm-900nm. A coaxial optical path is formed through a collimating lens and a spectrometer to realize post-spectroscopic detection, reducing the number of LEDs and improving detection sensitivity.
It effectively reduces the fluctuation of LED light sources, does not affect system testing, and realizes real-time testing without long-term thermal stability, solves the problem that the front spectroscopic LED light sources cannot perform multi-wavelength detection at the same time, and reduces misjudgment during the detection process.
Smart Images
Figure CN222687982U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of LED spectroscopic detection, and in particular to a synthetic LED coaxial light source device and a detection system. Background Art
[0002] Currently, in the fields of medical diagnosis and environmental analysis, testing the colorimetric, turbidimetric, and scattering characteristics of light of different wavelengths in reagents is a widely used analytical method. However, in the existing technical solutions, the use of halogen lamps as light sources is still the mainstream. As a thermal light source, the thermal effect brought by halogen lamps has a certain impact on the test stability and reagent fidelity, and its lifespan is relatively short. The instrument needs to be replaced after a period of use, which brings disadvantages such as maintenance troubles, high costs, and poor instrument performance consistency.
[0003] At present, a small number of LED multi-wavelength color combination solutions are used as light sources. The light formed by the combined beam is a wide-band multi-wavelength beam with the intrinsic luminescence characteristics of each LED. It needs to be detected by the detection optical path again with narrow-band spectroscopic detection. The cost of configuring components will increase accordingly, the system structure will become complicated, and the detection sensitivity will also decrease. In addition, the LED light source itself is also susceptible to wavelength drift and power changes due to temperature, and its own fluctuations will also affect the test results. Summary of the invention
[0004] In order to overcome the deficiencies of the prior art, the present application provides a synthetic LED coaxial light source device and a detection system.
[0005] In the first aspect, the present application provides a synthetic LED coaxial light source device adopts the following technical solution:
[0006] A synthetic LED coaxial light source device comprises an LED lamp group, a reference module, a beam shaping optical path and a power supply module; the LED lamp group comprises a plurality of monochromatic LEDs and a white light LED, and the wavelength range of the LED lamp group covers 340nm-900nm; the light output end of any of the LEDs is sequentially provided with a collimating lens and a beam splitter of a corresponding wavelength range; the beam splitters are coaxially arranged; the light output end of the light source device is provided with a light output lens; the light source emitted by the LED passes through the collimating lens and the beam splitter in sequence to form a coaxial optical path, and the coaxial optical path passes through the light output lens to form a beam shaping optical path and emits light outward; the power supply module supplies power to each LED.
[0007] By adopting the above technical solution, the halogen light source is replaced by an LED light source in the analysis and testing system; due to the white light LED with a wider wavelength range, the number of LEDs in the combined color LED light source can be effectively reduced and the detection sensitivity can be improved; the volatility of the LED can be prevented from affecting the system test; the light source can be tested instantly without long-term thermal stabilization. Using this light source and adopting the post-spectral detection form solves the problem that the front-spectral LED light source cannot perform multi-wavelength detection at the same time.
[0008] Optionally, adjacent beam splitters are arranged parallel to each other or cross-arranged in an eight-shaped pattern.
[0009] By adopting the above technical solution, it is convenient to form a coaxial light source.
[0010] Optionally, the collimating lens is a spherical lens or an aspherical lens.
[0011] By adopting the above technical solution, the light source emitted by the LED can be more concentrated and irradiated onto the beam splitter, thereby reducing light loss.
[0012] Optionally, the beam splitters are both long-wave pass and short-wave reflective.
[0013] By adopting the above technical solution, it is convenient to filter the light source and select an appropriate wavelength.
[0014] Optionally, the beam splitters are all of the long-wave and short-wave pass type.
[0015] By adopting the above technical solution, it is convenient to filter the light source and select an appropriate wavelength.
[0016] Optionally, the wavelength range of the white light LED is 450nm-850nm.
[0017] By adopting the above technical solution, the number of LEDs is reduced, and detection in a variety of wavelength ranges is achieved.
[0018] Optionally, the reference module includes a reference beam splitter and a first reference detector, wherein the reference beam splitter is located between a beam splitter close to a light output lens and the light output lens, and the light source receiving end of the first reference detector corresponds to the optical path output end of the reference beam splitter, and the signal of the first reference detector can be used as a reference baseline value.
[0019] By adopting the above technical solution, in the later biological detection process, the detector value obtained after the detection is judged with the reference baseline value, and the phenomenon of misjudgment is reduced through reference judgment.
[0020] In a second aspect, the present application discloses a detection system, which adopts the following technical solution:
[0021] A detection system adopts the synthetic LED coaxial light source device for detection, including a sample pool and a spectroscopic module for spectroscopic detection of the synthesized light passing through the sample pool, the spectroscopic module includes a spectroscopic structure for splitting the synthesized light into monochromatic light, and a plurality of second reference detectors corresponding to the wavelengths of each monochromatic light, the output signal of the second reference detector is used as the detection value, and the detection value is compared with the reference base value for judgment
[0022] By adopting the above technical solution, through reference, it can be clearly understood whether the detection abnormality is caused by voltage instability or the detected source itself, thereby reducing misjudgment.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. Effectively reduce the number of LEDs in the combined color LED light source and improve detection sensitivity; enable the volatility of LEDs to not affect system testing; enable the light source to be tested instantly without the need for long-term thermal stabilization;
[0025] 2. Using this light source and adopting the post-spectral detection form solves the problem that the front-spectral LED light source cannot perform multi-wavelength detection at the same time;
[0026] 3. Reduce the phenomenon of misjudgment during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the synthetic LED coaxial light source device.
[0029] Figure 2 It is a structural schematic diagram of the LED part in the first embodiment of the synthetic LED coaxial light source device.
[0030] Figure 3 It is a schematic diagram of the overall structure of the second embodiment of the synthetic LED coaxial light source device.
[0031] Figure 4 It is a schematic diagram of the overall structure of the detection system.
[0032] Figure numerals: 1. reference module; 2. LED; 3. collimating lens; 4. beam splitter; 5. light output lens; 6. reference beam splitter; 7. first reference detector; 8. sample cell; 9. beam splitter structure; 10. second reference detector. DETAILED DESCRIPTION
[0033] The following is combined with Figure 1-4 This application is described in further detail.
[0034] In a first aspect, an embodiment of the present application discloses a synthetic LED coaxial light source device.
[0035] Embodiment 1:
[0036] Reference Figure 1 A synthetic LED coaxial light source device includes an LED light group, a beam shaping optical path and a power supply module. The LED light group is mainly used to generate a light beam, and the power supply module is used to supply power to the LED light group. The beam shaping optical path is mainly used to focus and shape the light beam generated by the LED light group, thereby reducing light loss during actual use.
[0037] Reference Figure 1 The LED light group includes a plurality of LEDs 2. In this embodiment, there is at least one monochrome LED in the LED light group, and there is also at least one white light LED in the LED light group, and the wavelength range of the white light LED is between 450nm-850nm.
[0038] Reference Figure 1 In the above embodiments, there are multiple settings for the center wavelength of the monochromatic LED, wherein the center wavelength of the monochromatic LED can be 340nm, 380nm, 405nm, etc., and can be selected and adjusted in quantity according to actual use.
[0039] Reference Figure 1 and Figure 2 In order to reduce the phenomenon of light loss, a collimating lens 3 and a beam splitter 4 of a corresponding wavelength range are sequentially arranged at the light output end of each LED 2, and a light output lens 5 is arranged at the light output end of the light source device, so that under the action of the collimating lens 3 and the light output lens 5, the light source emitted by the LED 2 passes through the collimating lens 3 and the beam splitter 4 in sequence to form a coaxial light path, and the coaxial light path passes through the light output lens 5 to form a beam shaping light path and emit light outward.
[0040] Reference Figure 2 In this embodiment, the collimating lens 3 is a spherical half mirror or an aspherical mirror. In order to ensure the stability of the light beam and reduce light loss, a spherical lens is preferably used in this embodiment. The spherical lens is a convex lens and has a focusing effect.
[0041] Reference Figure 1In the synthetic LED coaxial light source device disclosed in this embodiment, the number of the beam splitters 4 is set to be multiple, and the multiple beam splitters 4 are evenly arranged along the axial direction of the coaxial light path, a single beam splitter 4 is placed at an angle of 45 degrees, and two adjacent beam splitters 4 can be placed parallel to each other or in an eight-shaped cross-spaced manner. In this embodiment, the two adjacent beam splitters 4 are preferably arranged in an eight-shaped shape.
[0042] Reference Figure 1 In order to ensure the stability of the light beam output, the beam splitter 4 uses a beam splitter 4 with a fixed wavelength range for filtering. The beam splitter 4 can be a long-wave pass and short-wave reverse type or a long-wave reverse and short-wave pass type. In this embodiment, the beam splitter 4 preferably uses a long-wave pass and short-wave reverse type.
[0043] Embodiment 2:
[0044] Reference Figure 3 The difference between the second embodiment and the first embodiment is that: in the second embodiment, in order to reduce the phenomenon of misjudgment, a reference module 1 is further provided in the synthetic LED coaxial light source device, and the reference module 1 includes a reference beam splitter 6 and a first reference detector 7. The reference beam splitter 6 is arranged between the beam splitter 4 located near the light output lens 5 and the light output lens 5. In the present embodiment, the light source receiving end of the first reference detector 7 is arranged opposite to the optical path output end of the reference beam splitter 6.
[0045] Reference Figure 3 , so that in actual use, the light source emitted by the beam splitter 4 and the light output lens 5 passes through the optical path output end of the reference beam splitter 6, and part of the light source is reflected to the light source receiving end of the first reference detector 7, so that the signal generated by the first reference detector 7 is used as the reference reference value. It is convenient to compare the detection value with the reference reference value in real time during the detection of biological samples, so as to determine whether the detection abnormality is caused by voltage instability, and then determine the desirability of the detection value.
[0046] In a second aspect, the present application discloses a detection system.
[0047] Reference Figure 4 A detection system is provided, which uses the synthetic LED2 coaxial light source device disclosed in the above-mentioned embodiment 2 for detection. The detection system includes a sample pool 8 and a spectroscopic module. In the actual detection process, the sample pool 8 is placed in the coaxial light path, and the position of the sample pool 8 is set between the reference beam splitter 6 and the spectroscopic module.
[0048] Reference Figure 4The light splitting module includes a light splitting structure 9 for splitting the synthesized light into monochromatic light, and a plurality of second reference detectors 10 corresponding to the wavelengths of the monochromatic light. The light splitting structure 9 is a grating or a prism. In this embodiment, the light splitting structure 9 is optimally set to a grating. A plurality of second reference detectors 10 are provided. After detection, the plurality of second reference detectors 10 corresponding to the wavelengths of the monochromatic light will cause the second reference detector 10 to generate an output signal. The output signal of the second reference detector 10 is used as the detection value, and then the detection value is compared with the reference base value through a comparator, and finally the detection personnel are prompted whether there is voltage fluctuation, thereby ensuring the stability of the entire detection process.
[0049] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A synthetic LED coaxial light source device, characterized in that: It comprises an LED light group, a reference module (1), a beam shaping optical path and a power supply module; The LED light group includes a plurality of monochromatic LEDs and a white light LED, and the wavelength range of the LED light group covers 340nm-900nm; The light output end of any LED (2) is sequentially provided with a collimating lens (3) and a beam splitter (4) of a corresponding wavelength range; the beam splitters (4) are coaxially arranged; The light output end of the light source device is provided with a light output lens (5); The light source emitted by the LED (2) passes through a collimating lens (3) and a beam splitter (4) in sequence to form a coaxial light path, and the coaxial light path passes through a light output lens (5) to form a beam shaping light path and emit light outwards; The power supply module supplies power to each LED (2).
2. A synthetic LED coaxial light source device according to claim 1, characterized in that: The adjacent beam splitters (4) are arranged parallel to each other or cross-arranged in an eight-shaped pattern.
3. The synthetic LED coaxial light source device according to claim 1, characterized in that: The collimating lens (3) is a spherical lens or an aspherical lens.
4. The synthetic LED coaxial light source device according to claim 1, characterized in that: The beam splitter (4) is of the same type as long-wave pass and short-wave inversion type.
5. The synthetic LED coaxial light source device according to claim 1, characterized in that: The beam splitters (4) are all of the long-wave and short-wave pass type.
6. The synthetic LED coaxial light source device according to claim 1, characterized in that: The wavelength range of white light LED is 450nm-850nm.
7. The synthetic LED coaxial light source device according to claim 1, characterized in that: The reference module (1) comprises a reference beam splitter (6) and a first reference detector (7); the reference beam splitter (6) is located between a beam splitter (4) close to a light output lens (5) and the light output lens (5); a light source receiving end of the first reference detector (7) corresponds to an optical path output end of the reference beam splitter (6); and a signal of the first reference detector (7) can be used as a reference base value.
8. A detection system, using the synthetic LED coaxial light source device of claim 7 for detection, characterized in that: The invention comprises a sample pool (8) and a spectroscopic module for spectroscopically detecting the synthesized light passing through the sample pool (8); the spectroscopic module comprises a spectroscopic structure (9) for separating the synthesized light into monochromatic light, and a plurality of second reference detectors (10) corresponding to the wavelengths of the monochromatic light; the output signal of the second reference detector (10) is used as a detection value, and the detection value is compared with a reference base value for judgment.