A UV detector with different sensitivities

Abstract

This utility model relates to an ultraviolet detector that accommodates different sensitivities. It solves the technical problem of poor detection performance of existing detectors for components of different concentrations. It includes a detector housing, with a light source mechanism at one end of the housing. The light source mechanism is connected to a grating body disposed within the detector housing via a light source channel. A beam-splitting housing is installed at the end of the detector housing away from the light source mechanism. The beam-splitting housing has a first optical path and a second optical path arranged perpendicularly to each other. A photosensitive detection component connected to the first and second optical paths is mounted on the beam-splitting housing. The beam-splitting mechanism is located inside the detector housing and is connected to a polarization mechanism, which is connected to the first and second optical paths respectively via mirrors. The advantages are: the first and second optical paths with different optical path lengths can meet the detection requirements for components of different concentrations; and the polarization mechanism can eliminate stray light from monochromatic light, improving the detection effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of chromatographic light source detection equipment, specifically relating to an ultraviolet detector that takes into account different sensitivities. Background Technology

[0002] In the practical application of preparative liquid chromatography (HPLC), simultaneously achieving accurate detection of trace substances and effective analysis of high-concentration components remains a core technical challenge for the industry. The core contradiction lies in the fact that high-concentration target components are prone to forming "flat-topped peaks" during separation due to detector signal saturation, leading to peak area integration distortion and decreased quantitative accuracy. Meanwhile, trace substances require highly sensitive detection conditions for effective identification and quantification. Current industry solutions to this problem have significant limitations. One method, diluting the sample to reduce the content of high-concentration components and avoid signal saturation, can alleviate the "flat-topped peak" phenomenon to some extent, but it significantly reduces the concentration of trace substances, bringing them close to the detector's detection limit, greatly hindering accurate quantification and qualitative analysis of trace components, especially negatively impacting the separation and preparation of low-abundance active ingredients. Another common strategy is to use wavelength scanning detectors, attempting to balance the response differences of components at different concentrations by optimizing the detection wavelength. However, the effectiveness of this scheme heavily relies on the inherent differences in the ultraviolet absorption spectral characteristics of each component. In complex sample systems, it is often difficult to find a perfect compromise between linear response of high-concentration components and high sensitivity of trace components. In practical applications, the effect of improving the sensitivity of trace components is limited, and it cannot fundamentally solve the detection contradiction caused by concentration differences. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing an ultraviolet detector that takes into account different sensitivities.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A UV detector with varying sensitivities includes a detector housing. One end of the detector housing is equipped with a light source mechanism, which is connected to a grating body disposed within the detector housing via a light source channel. A beam-splitting housing is installed at the end of the detector housing away from the light source mechanism. The beam-splitting housing has a first optical path and a second optical path arranged perpendicularly to each other. A photosensitive detection component connected to the first and second optical paths is provided on the beam-splitting housing. The detector housing contains a beam-splitting mechanism connected to the grating body. The device is equipped with a polarization mechanism that is connected to both the first and second optical paths. The light source mechanism transmits the light to be measured to the grating through the light source channel. The grating decomposes the light to be measured into monochromatic light, which improves the detection sensitivity. The beam splitting mechanism divides the monochromatic light into two monochromatic light sources, which are transmitted toward the first and second optical paths respectively. The polarization mechanism filters stray light from the monochromatic light, improving the detection effect. It also guides the monochromatic light toward the first and second optical paths respectively. The photosensitive detection component receives the absorbed unidirectional light and converts the optical signal into an electrical signal.

[0005] In the aforementioned ultraviolet detector that balances different sensitivities, the photosensitive detection component includes a first photosensitive probe disposed at one end of the intersection of the first optical path and the second optical path, and a second photosensitive probe disposed at one end of the intersection of the second optical path and the first optical path. The first photosensitive probe can detect monochromatic light in the first optical path, and the second photosensitive probe can detect unidirectional light in the second optical path.

[0006] In the aforementioned ultraviolet detector that balances different sensitivities, the length of the first optical path is greater than the length of the second optical path. The first optical path is arranged radially along the beam-splitting housing, with one end penetrating the outer circumference of the beam-splitting housing and corresponding to the first photosensitive probe. The second optical path is arranged axially along the beam-splitting housing, with one end penetrating the end of the beam-splitting housing away from the detector housing and corresponding to the second photosensitive probe. The length of the first optical path is greater than the length of the second optical path, and the monochromatic light path length of the first optical path is greater than that of the second optical path. The monochromatic light of the first optical path can improve the detection sensitivity for trace components, while the monochromatic light of the second optical path can ensure the detection sensitivity for high-concentration components.

[0007] In the aforementioned ultraviolet detector that accommodates different sensitivities, the beam-splitting mechanism includes a beam splitter disposed on the inner side of the detector housing near the beam-splitting housing. The beam splitter is connected to a first beam-splitting channel, a second beam-splitting channel, and a third beam-splitting channel. The first beam-splitting channel extends axially along the detector housing, while the second beam-splitting channel is bent and disposed on the outer side of the detector housing. A reflector is provided at the bend of the second beam-splitting channel, reflecting towards the polarization mechanism. The third beam-splitting channel extends along the Z-axis of the beam-splitting housing, and a third photosensitive probe connected to the third beam-splitting channel is disposed outside the beam-splitting housing. The beam splitter can split a single monochromatic light into three monochromatic lights in different directions. The first and second beam-splitting channels can transmit the monochromatic light towards the polarization mechanism to become polarized light. The monochromatic light through the third beam-splitting channel is directly connected to the third photosensitive probe through the air. The monochromatic light through the third beam-splitting channel can be easily compared with the monochromatic light of the first and second beam-splitting channels, improving the detection effect.

[0008] In the aforementioned ultraviolet detector that balances different sensitivities, the polarization mechanism includes a first polarizer and a second polarizer. The first polarizer is disposed at the end of the first beam splitting channel away from the beam splitter, and the second polarizer is disposed at the end of the second beam splitting channel away from the beam splitter. The first and second polarizers can eliminate stray light from monochromatic light and prevent interference when the two polarized lights intersect, thereby improving the detection effect of monochromatic light on each component.

[0009] In the aforementioned ultraviolet detector that accommodates different sensitivities, the beam-splitting housing is axially provided with a first polarized optical path coaxially connected to the first beam-splitting channel. The first polarizer is disposed between the first beam-splitting channel and the first polarized optical path. The first polarized optical path is perpendicular to the first optical path. The first polarized optical path is coaxially connected to the second optical path. Monochromatic light is converted into first polarized light by the first polarizer and transmitted toward the first polarized optical path. The first polarized light is connected to the second optical path.

[0010] In the aforementioned ultraviolet detector that accommodates different sensitivities, a second polarized optical path is radially provided inside the beam-splitting housing and connected to the second beam-splitting channel. A second polarizer is disposed between the second beam-splitting channel and the second polarized optical path. The second polarized optical path is perpendicular to the second optical path and is coaxially arranged and connected to the first optical path. Monochromatic light is converted into second polarized light by the second polarizer and transmitted toward the second polarized optical path. The second polarized light can be connected to the first optical path.

[0011] In the aforementioned ultraviolet detector that accommodates different sensitivities, the first polarization optical path, the second polarization optical path, and the second optical path are arranged in a cross shape. The beam-splitting housing has a flow path inlet that penetrates the beam-splitting housing and is connected to the second polarization optical path at one end, and a flow path outlet that is connected to the first optical path at the other end of the beam-splitting housing. The flow path inlet and the flow path outlet are connected through the intersection of the first and second optical paths. The first optical path, with its longer optical path, can detect trace components, ensuring detection effectiveness, while the second optical path, with its shorter optical path, can detect high-concentration components, also ensuring detection effectiveness.

[0012] In the aforementioned ultraviolet detector that accommodates different sensitivities, the light source mechanism includes a light source housing fixedly disposed at one end of the detector housing. The light source housing contains a lamp body and a focusing channel connected to the light source channel. The light source housing can protect the lamp body, and the focusing channel can focus and guide the light source into the light source channel to improve the light intensity.

[0013] In the aforementioned ultraviolet detector that balances different sensitivities, the lamp is specifically positioned at one end of the focusing channel, and a convex lens corresponding to the lamp is provided within the focusing channel. The convex lens is a Fresnel lens, which can improve the focusing effect and increase the detection sensitivity.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] 1. The first and second optical paths with different optical path lengths can meet the detection of components with different concentrations, and the detection effect is improved by comparing with the monochromatic light of the third optical channel.

[0016] 2. The polarization mechanism can eliminate stray light from monochromatic light, thus improving the detection effect.

[0017] 3. The photosensitive detection component can improve the detection sensitivity of trace components and improve the detection effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a structural cross-sectional view of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the beam-splitting shell in this utility model.

[0021] In the diagram: Detector housing 1, Light source mechanism 2, Light source channel 21, Light source housing 22, Lamp body 23, Focusing channel 24, Grating body 3, Beam splitting housing 4, First optical path 41, Second optical path 42, First polarized optical path 43, Second polarized optical path 44, Flow path inlet 45, Flow path outlet 46, Photosensitive detection component 5, First photosensitive probe 51, Second photosensitive probe 52, Beam splitting mechanism 6, Beam splitter 61, First beam splitting channel 62, Second beam splitting channel 63, Polarization mechanism 7, First polarizer 71, Second polarizer 72, Reflector 8, Convex lens 9. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 , Figure 2 , Figure 3 As shown, this ultraviolet detector, which accommodates different sensitivities, includes a detector housing 1. A light source mechanism 2 is provided at one end of the detector housing 1. The light source mechanism 2 is connected to a grating 3 disposed inside the detector housing 1 via a light source channel 21. A beam-splitting housing 4 is installed at the end of the detector housing 1 away from the light source mechanism 2. The beam-splitting housing 4 has a first optical path 41 and a second optical path 42 arranged perpendicularly intersecting each other. A photosensitive detection component 5 connected to the first optical path 41 and the second optical path 42 is provided on the beam-splitting housing 4. A beam-splitting mechanism 6 connected to the grating 3 is provided inside the detector housing 1. The beam-splitting mechanism 6 is connected to a polarization mechanism 7, and the polarization mechanism 7 is respectively connected to... The first optical path 41 and the second optical path 42 are connected. The light source mechanism 2 can transmit the light to be measured to the grating body 3 through the light source channel 21. The grating body 3 can decompose the light to be measured into monochromatic light. Monochromatic light can improve the detection sensitivity. The beam splitting mechanism 6 divides the monochromatic light into two monochromatic light sources and transmits them toward the first optical path 41 and the second optical path 42 respectively. The polarization mechanism 7 can filter stray light from the monochromatic light, improve the detection effect, and guide the monochromatic light toward the first optical path 41 and the second optical path 42 respectively. The photosensitive detection component 5 can receive the absorbed unidirectional light and convert the optical signal into an electrical signal.

[0024] Specifically, the photosensitive detection component 5 includes a first photosensitive probe 51 disposed at the end of the first optical path 41 away from the intersection of the second optical path 42 and the second photosensitive probe 52 disposed at the end of the second optical path 42 away from the intersection of the first optical path 41 and the second optical path 42. The first photosensitive probe 51 can detect monochromatic light on the first optical path 41, and the second photosensitive probe 52 can detect unidirectional light on the second optical path 42.

[0025] The length of the first optical path 41 is greater than the length of the second optical path 42. The first optical path 41 is arranged radially along the beam-splitting housing 4, with one end penetrating the outer periphery of the beam-splitting housing 4 and corresponding to the first photosensitive probe 51. The second optical path 42 is arranged axially along the beam-splitting housing 4, with one end penetrating the end of the beam-splitting housing 4 away from the detector housing 1 and corresponding to the second photosensitive probe 52. The length of the first optical path 41 is greater than the length of the second optical path 42, and the monochromatic light path length of the first optical path 41 is greater than that of the second optical path 42. The monochromatic light of the first optical path 41 can improve the detection sensitivity of trace components, while the monochromatic light of the second optical path 42 can ensure the detection sensitivity of high-concentration components.

[0026] like Figure 2 , Figure 3 As shown, the beam splitting mechanism 6 includes a beam splitter 61 disposed on the inner side of one end of the detector housing 1 near the beam splitting housing 4. The beam splitter 61 is connected to a first beam splitting channel 62, a second beam splitting channel 63, and a third beam splitting channel. The first beam splitting channel 62 extends axially along the detector housing 1. The second beam splitting channel 63 is bent and disposed on the outer side of the detector housing 1, and a reflector 8 is provided at the bend of the second beam splitting channel 63, which is directed towards the polarization mechanism 7 for reflection. The third beam splitting channel extends along the Z-axis of the beam splitting housing, and the outer side of the beam splitting housing is provided with a reflector 8 that is connected to the third beam splitting mechanism 7. The third photosensitive probe, connected to the beam splitting channel, can split a single monochromatic light into three monochromatic lights in different directions via beam splitter 61. The third beam splitting channel and the third photosensitive probe are not shown in the figure. The monochromatic light can be transmitted towards the polarization mechanism 7 and converted into polarized light through the first beam splitting channel 62 and the second beam splitting channel 63. The monochromatic light through the third beam splitting channel is directly connected to the third photosensitive probe through the air. The monochromatic light through the third beam splitting channel can be easily compared with the monochromatic light of the first beam splitting channel 62 and the second beam splitting channel 63, thereby improving the detection effect.

[0027] Furthermore, the polarization mechanism 7 includes a first polarizer 71 and a second polarizer 72. The first polarizer 71 is disposed at the end of the first beam splitting channel 62 away from the beam splitter 61, and the second polarizer 72 is disposed at the end of the second beam splitting channel 63 away from the beam splitter 61. The first polarizer 71 and the second polarizer 72 can eliminate stray light of monochromatic light and prevent interference when the two polarized lights intersect, thereby improving the detection effect of monochromatic light on each component.

[0028] The beam splitting housing 4 is axially provided with a first polarization optical path 43 that is coaxially connected to the first beam splitting channel 62. A first polarizer 71 is disposed between the first beam splitting channel 62 and the first polarization optical path 43. The first polarization optical path 43 is perpendicular to the first optical path 41. The first polarization optical path 43 is coaxially connected to the second optical path 42. Monochromatic light is converted into first polarized light by the first polarizer 71 and transmitted toward the first polarization optical path 43. The first polarized light is connected to the second optical path 42.

[0029] Combination Figure 1 , Figure 2 , Figure 3 As shown, a second polarization optical path 44 is radially provided inside the beam splitting housing 4 and is connected to the second beam splitting channel 63. A second polarizer 72 is disposed between the second beam splitting channel 63 and the second polarization optical path 44. The second polarization optical path 44 is perpendicular to the second optical path 42. The second polarization optical path 44 is coaxially disposed and connected to the first optical path 41. Monochromatic light is converted into second polarized light by the second polarizer 72 and is transmitted toward the second polarization optical path 44. The second polarized light is connected to the first optical path 41.

[0030] The first polarization optical path 43, the first optical path 41, the second polarization optical path 44, and the second optical path 42 are arranged in a cross shape. The beam splitting housing 4 has a flow path inlet 45 that penetrates the end of the beam splitting housing 4 away from the detector housing 1 and is connected to the second polarization optical path 44. The end of the beam splitting housing 4 away from the detector housing 1 has a flow path outlet 46 that is connected to the first optical path 41. The flow path inlet 45 and the flow path outlet 46 are connected through the intersection of the first optical path 41 and the second optical path 42. The flow path inlet 45 contains the component to be measured. The component to be measured flows to the flow path outlet 46 through the intersection of the first optical path 41 and the second optical path 42. The first optical path 41, with its longer optical path, can detect trace components, ensuring detection effect. The second optical path 42, with its shorter optical path, can detect high-concentration components, ensuring detection effect.

[0031] Specifically, the light source mechanism 2 includes a light source housing 22 fixedly installed at one end of the detector housing 1. The light source housing 22 is provided with a lamp body 23 and a focusing channel 24 connected to the light source channel 21. The light source housing 22 can protect the lamp body 23, and the focusing channel 24 can focus and guide the light source into the light source channel 21 to improve the light intensity.

[0032] Combination Figure 1 As shown, the lamp body 23 is set at one end of the focusing channel 24. The focusing channel 24 is provided with a convex lens 9 corresponding to the lamp body 23. The convex lens 9 is a Fresnel lens. The Fresnel lens can improve the focusing effect and improve the detection sensitivity.

[0033] The principle of this embodiment is as follows: the light source is decomposed into monochromatic light by the grating body 3, and the monochromatic light is transmitted to the first beam splitting channel 62 and the second beam splitting channel 63 by the beam splitting mechanism 6. The monochromatic light is eliminated by the polarization mechanism 7 to form polarized light, thereby improving the detection effect. Different concentration components can be detected by the first optical path 41 and the second optical path 42 with different optical path lengths. The detection effect is guaranteed by comparing with the monochromatic light of the third beam splitting channel.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0035] Although this document frequently uses terms such as detector housing 1, light source mechanism 2, light source channel 21, light source housing 22, lamp body 23, focusing channel 24, grating body 3, beam splitting housing 4, first optical path 41, second optical path 42, first polarized optical path 43, second polarized optical path 44, flow path inlet 45, flow path outlet 46, photosensitive detection component 5, first photosensitive probe 51, second photosensitive probe 52, beam splitting mechanism 6, beam splitter 61, first beam splitting channel 62, second beam splitting channel 63, polarization mechanism 7, first polarizer 71, second polarizer 72, reflector 8, convex lens 9, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An ultraviolet detector that accommodates different sensitivities, comprising a detector housing (1), wherein a light source mechanism (2) is provided at one end of the detector housing (1), and the light source mechanism (2) is connected to a grating (3) disposed within the detector housing (1) via a light source channel (21), characterized in that, The detector housing (1) is equipped with a beam splitting housing (4) at one end away from the light source mechanism (2). The beam splitting housing (4) has a first optical path (41) and a second optical path (42) arranged perpendicularly. The beam splitting housing (4) is provided with a photosensitive detection component (5) connected to the first optical path (41) and the second optical path (42). The detector housing (1) is provided with a beam splitting mechanism (6) connected to the grating body (3). The beam splitting mechanism (6) is connected to a polarization mechanism (7), and the polarization mechanism (7) is connected to the first optical path (41) and the second optical path (42) respectively.

2. The ultraviolet detector that accommodates different sensitivities according to claim 1, characterized in that, The photosensitive detection component (5) includes a first photosensitive probe (51) disposed at the end of the first optical path (41) away from the intersection of the second optical path (42) and a second photosensitive probe (52) disposed at the end of the second optical path (42) away from the intersection of the first optical path (41) and the intersection of the second optical path (42) and the first optical path (41).

3. The ultraviolet detector that accommodates different sensitivities according to claim 1, characterized in that, The length of the first optical path (41) is greater than the length of the second optical path (42). The first optical path (41) is arranged radially along the beam splitting housing (4) and one end of the first optical path (41) passes through the outer circumference of the beam splitting housing (4) and corresponds to the first photosensitive probe (51). The second optical path (42) is arranged axially along the beam splitting housing (4). One end of the second optical path (42) passes through the end of the beam splitting housing (4) away from the detector housing (1) and corresponds to the second photosensitive probe (52).

4. A UV detector that accommodates different sensitivities according to claim 1, 2, or 3, characterized in that, The beam splitting mechanism (6) includes a beam splitter (61) disposed on the inner side of one end of the detector housing (1) near the beam splitting housing (4). The beam splitter (61) is connected to the first beam splitting channel (62), the second beam splitting channel (63), and the third beam splitting channel. The first beam splitting channel (62) extends along the axial direction of the detector housing (1). The second beam splitting channel (63) is bent and disposed on the outer side of the detector housing (1). A reflector (8) is provided at the bend of the second beam splitting channel (63) and is set towards the polarization mechanism (7). The third beam splitting channel extends along the Z-axis of the beam splitting housing and a third photosensitive probe connected to the third beam splitting channel is provided outside the beam splitting housing.

5. The ultraviolet detector according to claim 4, characterized in that, The polarization mechanism (7) includes a first polarizer (71) and a second polarizer (72). The first polarizer (71) is disposed at one end of the first beam splitting channel (62) away from the beam splitter (61), and the second polarizer (72) is disposed at one end of the second beam splitting channel (63) away from the beam splitter (61).

6. The ultraviolet detector according to claim 5, which accommodates different sensitivities, is characterized in that, The beam splitting housing (4) is axially provided with a first polarization optical path (43) coaxially connected to the first beam splitting channel (62). The first polarizer (71) is disposed between the first beam splitting channel (62) and the first polarization optical path (43). The first polarization optical path (43) is perpendicular to the first optical path (41). The first polarization optical path (43) is coaxially connected to the second optical path (42).

7. The ultraviolet detector that accommodates different sensitivities according to claim 6, characterized in that, The beam splitting housing (4) is radially provided with a second polarization optical path (44) that is connected to the second beam splitting channel (63). The second polarizer (72) is disposed between the second beam splitting channel (63) and the second polarization optical path (44). The second polarization optical path (44) is perpendicular to the second optical path (42). The second polarization optical path (44) is coaxially disposed with the first optical path (41) and connected to it.

8. The ultraviolet detector according to claim 7, characterized in that, The first polarization optical path (43), the first optical path (41), the second polarization optical path (44), and the second optical path (42) are arranged in a cross shape. The beam splitting housing (4) is provided with a flow path inlet (45) that penetrates the beam splitting housing (4) away from the detector housing (1) and is connected to the second polarization optical path (44). The beam splitting housing (4) is provided with a flow path outlet (46) that is connected to the first optical path (41) at the end away from the detector housing (1). The flow path inlet (45) and the flow path outlet (46) are connected through the intersection of the first optical path (41) and the second optical path (42).

9. The ultraviolet detector that accommodates different sensitivities according to claim 1, characterized in that, The light source mechanism (2) includes a light source housing (22) fixedly disposed at one end of the detector housing (1), a lamp body (23) is provided inside the light source housing (22), and a focusing channel (24) connected to the light source channel (21) is provided inside the light source housing (22).

10. A UV detector that accommodates different sensitivities according to claim 9, characterized in that, The lamp body (23) is set at one end of the focusing channel (24), and the focusing channel (24) is provided with a convex lens (9) corresponding to the lamp body (23). The convex lens (9) is a Fresnel lens.

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