Light source assembly and spectral detection device

Abstract

The application provides a light source assembly and a spectrum detection device, and relates to the field of spectrum detection equipment. The light source assembly comprises a support assembly, a light filter and a plurality of light source parts; the plurality of light source parts are installed on the support assembly and are arranged at intervals; the light emitting wavelength of at least one light source part in the plurality of light source parts is different from the light emitting wavelength of other light source parts; the support assembly has a separation structure; two adjacent light source parts are blocked by the separation structure; the separation structure extends upward from the plane where the bottom surface of the light source part is located; the top surface of the separation structure is higher than the top surface of each light source part; the light filter is installed on the support assembly; and at least one light source part is provided with the light filter. The light source assembly of the application can avoid crosstalk between the light source parts and inhibit spectrum tailing at the same time, so that when the light source assembly is applied to the spectrum detection device, the spectrum detection device has a high signal-to-noise ratio and the detection sensitivity is improved; and the spectrum detection device also solves the problems of uneven light spot and low light utilization.

Description

Technical Field

[0001] This application relates to the field of spectral detection equipment, and more specifically, to a light source component and a spectral detection device. Background Technology

[0002] With the development of multi-band spectral detection and fluorescence excitation technologies, integrated light sources in the deep ultraviolet to near-infrared bands are becoming increasingly important in fields such as spectral detection, medical imaging, and materials characterization. Current technologies often employ the integration of multiple LEDs (Light Emitting Diodes) to obtain a wide spectral range; however, this type of multi-core light source suffers from the following problems during integration: Spectral tailing: Spectral tailing refers to the phenomenon where, due to current technological limitations, the actual LED spectrum, in the long wavelength direction, resembles a long "tail" as the light intensity decreases, slowly approaching zero. LEDs have a wide emission spectrum, and the spectral tailing effect, especially in ultraviolet LEDs, can mask weak fluorescence or spectral signals, such as the fluorescence of biological markers.

[0003] Crosstalk problem: When short-wavelength LEDs are excited by ultraviolet light, they may excite the phosphors of adjacent LEDs, such as white LEDs, leading to spectral pollution.

[0004] Uneven light spot: The divergence angles of LEDs in different wavelength bands vary greatly. For example, the divergence angle of ultraviolet LEDs is small, while that of white LEDs is large, resulting in low overlap of light spots at the detector receiving end.

[0005] Low light utilization: Traditional light sources do not optimize the optical path, resulting in wasted light energy during spectral detection. Utility Model Content

[0006] The purpose of this application is to provide a light source component and a spectral detection device to alleviate the technical problems of spectral tailing, crosstalk, uneven light spot and low light utilization in multi-core light sources in the prior art.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: In the first aspect, the light source assembly provided by this utility model includes a support assembly, at least one filter element, and multiple light source elements; Multiple light sources are mounted on the support assembly and are spaced apart; at least one of the multiple light sources has a different emission wavelength than the other light sources. The support assembly has a partition structure, which separates two adjacent light sources. The partition structure extends upward from the plane containing the bottom surface of the light source and the top surface of the partition structure is higher than the top surface of each light source. At least one of the filter elements is mounted on the support assembly, and at least one of the light source elements is provided with the filter element.

[0008] Furthermore, the light source assembly also includes a conductive element, which is mounted on the support assembly and located on the side of the light source assembly away from the filter element; the conductive element is electrically connected to the light source assembly.

[0009] Furthermore, the support assembly includes a substrate, the substrate having a first groove having a number greater than or equal to the number of the light source elements, the sidewalls of the first groove forming the partition structure, the bottom wall of the first groove having a second groove, the light source elements being installed in the first groove, and the conductive elements being installed in the second groove. The filter element is disposed at the opening end of the first groove.

[0010] Furthermore, the filter element is engaged or bonded to the sidewall of the first groove.

[0011] Furthermore, the support assembly also includes a support frame, which is mounted on the opening end of the first groove and connected to the top wall of the substrate, and the filter is mounted on the support frame.

[0012] Furthermore, the support assembly also includes a baffle wall disposed on the top wall of the substrate or the top wall of the support frame, and the baffle wall surrounds the outer periphery of the light source.

[0013] Furthermore, the support assembly includes a heat sink, a mounting frame, and pads, wherein the pads, the heat sink, and the conductive element are stacked sequentially from bottom to top; the mounting frame is mounted on the conductive element. A first groove is formed between the mounting frame and the conductive component, and the sidewall of the mounting frame is recessed outward to form a second groove communicating with the first groove; the light source component is installed in the first groove, and the filter component is installed in the second groove; the sidewall of the first groove forms the partition structure.

[0014] Furthermore, a lens is installed between the light source and the filter.

[0015] Secondly, the spectral detection device provided by this utility model includes, along the optical path direction, a light source assembly, a light homogenizing component, a collimating component, and a photodetector as described in any of the above items; The first incident light from the light source assembly passes sequentially through the homogenizing component, the collimating component, and the object under test, and is received by the receiving end of the photodetector.

[0016] Furthermore, the light-diffusing component has a light-exit port and a light-in port at both ends, the size of the light-exit port is larger than the size of the light-in port, and the inner wall of the light-diffusing component is provided with a reflective film layer; the light source assembly is installed on one side of the light-in port of the light-diffusing component, and the first incident light of the light source assembly is incident on the collimating component after being reflected multiple times by the inner wall of the light-diffusing component. Alternatively, the light homogenizing component has multiple optical fiber input ends and one optical fiber output end, the number of optical fiber input ends being equal to the number of light source components; each optical fiber input end is connected to the light source assembly, and the optical fiber output end is connected to the collimating component; the first incident light from the light source assembly enters the light homogenizing component through each optical fiber input end, and after multiple reflections within the light homogenizing component, it exits from the optical fiber output end to the collimating component. Alternatively, the light homogenizing component includes a hollow cavity with an inlet and an outlet disposed opposite to each other. The inlet is opposite to the light source assembly. The first incident light from the light source assembly enters the interior of the light homogenizing component through the inlet and undergoes multiple diffuse reflections before entering the collimating component through the outlet.

[0017] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows: Firstly, the light source assembly provided by this utility model includes a support assembly, at least one filter element, and multiple light source elements. The multiple light source elements are all mounted on the support assembly and spaced apart. At least one of the multiple light source elements has a different emission wavelength than the other light source elements. The support assembly has a partition structure, which separates adjacent light source elements. The partition structure extends upwards from the plane containing the bottom surface of the light source element, and its top surface is higher than the top surface of each light source element. At least one filter element is mounted on the support assembly, and at least one light source element has a filter element on it. The multiple light source elements are all mounted on the support assembly, which supports and fixes the light source elements. The multiple light source elements have different emission wavelengths, enabling the light source assembly to provide light of different wavelengths. The support assembly has a partition structure located between adjacent light source elements, which blocks the light source elements and prevents beam crosstalk between different light source elements. The light source elements have filters to suppress spectral tailing. This light source assembly utilizes a partition structure to physically isolate the light source components, allowing each component to be independently packaged and fitted with a filter. This enables each light source component with a specific emission wavelength to operate independently without cross-excitation. While avoiding crosstalk between the light source components, it also suppresses spectral tailing. As a result, when this light source assembly is applied to a spectral detection device, the spectral detection device has a high signal-to-noise ratio, improving detection sensitivity.

[0018] Secondly, the spectral detection device provided by this utility model includes, along the optical path, a light source assembly, a light homogenizing component, a collimating component, and a photodetector. The first incident light from the light source assembly passes sequentially through the light homogenizing component, the collimating component, and the object to be measured, and is received by the receiving end of the photodetector. In this spectral detection device, the light homogenizing component homogenizes the first incident light emitted from the light source assembly, improving the uniformity of the light spot and increasing the light energy utilization rate; thus solving the problems of uneven light spot and low light utilization rate. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Schematic diagram of the structure of the light source assembly provided in the embodiments of this application Figure 1 ; Figure 2 This is a schematic diagram of the structure of the support component in the light source assembly provided in the embodiments of this application when the first implementation method is adopted; Figure 3 A schematic diagram of the internal structure of the support component in the light source assembly provided in the embodiments of this application when the second implementation method is adopted; Figure 4 Schematic diagram of the structure of the light source assembly provided in the embodiments of this application Figure 2 ; Figure 5 Schematic diagram of the structure of the light source assembly provided in the embodiments of this application Figure 3 ; Figure 6 A schematic diagram of the spectral detection device provided in the embodiments of this application (the light homogenizing component includes a reflector).

[0021] icon: 100 - Support assembly; 110 - Substrate; 111 - First groove; 112 - Second groove; 120 - Support frame; 130 - Mounting frame; 131 - First slot; 132 - Second slot; 140 - Heat sink; 150 - Solder pad; 200-Filter; 300 - Light source components; 400 - Conductive component; 500-Uniform light component; 600-Alignment components; 700-Photodetector. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Example 1 See Figures 1 to 5 The light source assembly provided in this embodiment includes a support assembly 100, at least one filter element 200, and multiple light source elements 300. All multiple light source elements 300 are mounted on the support assembly 100 and spaced apart. At least one of the multiple light source elements 300 emits a different wavelength than the other light source elements 300. The support assembly 100 has a partition structure, which separates adjacent light source elements 300. The partition structure extends upward from the plane containing the bottom surface of the light source element 300, and the top surface of the partition structure is higher than the top surface of each light source element 300. At least one filter element 200 is mounted on the support assembly 100, and at least one light source element is provided with a filter element 200.

[0026] Specifically, the light source 300 is configured as an LED light source; the number of light source 300 can be 4, 6, 9, or 25, up to 100 or more, without specific limitation. The emission wavelength range of the multiple light source 300 covers the deep ultraviolet to near-infrared band, specifically including deep ultraviolet light, ultraviolet light, visible light, and near-infrared light, such as 285nm, 320nm, 365nm, 800nm, etc., thereby meeting the broad spectrum requirements. The support component 100 has a light-transmitting port, which corresponds to the light source 300, and the size of the light-transmitting port is greater than or equal to the size of the light source 300; a partition structure surrounds the outer periphery of the light-transmitting port, the bottom surfaces of each light source 300 are on the same plane, the partition structure extends upward from the plane containing the bottom surfaces of each light source 300, and the top surface of the partition structure is higher than the top surface of each light source 300.

[0027] The provision that at least one light source 300 has a filter 200 means that the number of filters 200 may be less than or equal to the number of light source 300s. Some light source 300s do not require filters 200. Light source 300s that do not require filters 200 are provided with an encapsulation layer. For example, a near-infrared light emitting light source 300 does not have a filter 200 but instead has a glass-like encapsulation layer with the same thickness as the filter 200. Furthermore, an encapsulation layer may also be provided on top of the filter 200 to increase the protection of internal components. It is worth noting that the filter element 200 can be a filter sheet or a filter film, without specific limitations. The filter element 200 is set according to the emission wavelength of the light source element 300. Different light source elements 300 are provided with different filter elements 200. The type of filter element 200 can be selected according to the wavelength of the light source element 300, without specific limitations. For example, it can be a narrowband filter, a long-pass filter, etc. The bandwidth of the narrowband filter can be set to ±10nm. For example, the light source element 300 emitting white light uses a 400nm long-pass filter, and the light source element 300 emitting a 365nm wavelength uses a 365nm narrowband filter. It is worth noting that the above-mentioned "covering" means that the filter element 200 is located above the light source element 300, and there can be a gap between the filter element 200 and the light source element 300.

[0028] Multiple light sources 300 are mounted on a support assembly 100, which supports and fixes the light sources 300. The multiple light sources 300 emit different wavelengths, enabling the light source assembly to provide light of different wavelengths. The support assembly 100 has a partition structure between adjacent light sources 300, which isolates the light sources 300 and prevents beam crosstalk between different light sources 300. A filter 200 is applied to the light sources 300 to suppress spectral tailing.

[0029] This light source assembly utilizes a partition structure to physically isolate the light source components 300, allowing each light source component 300 to be independently packaged and equipped with a filter component 200. This enables the light source components 300 with different emission wavelengths to operate independently without cross-excitation. While avoiding crosstalk between the light source components 300, it also suppresses spectral tailing. As a result, when the light source assembly is applied to a spectral detection device, the spectral detection device has a high signal-to-noise ratio and improves detection sensitivity in the application scenario.

[0030] In the optional embodiment of this utility model, the light source assembly further includes a conductive element 400, which is installed on the support assembly 100 and located on the side of the light source 300 away from the filter element 200; the conductive element 400 is electrically connected to the light source 300.

[0031] Specifically, the number of conductive elements 400 is the same as the number of light source elements 300, and multiple conductive elements 400 are electrically connected to multiple light source elements 300 in a one-to-one correspondence, so that each light source element 300 can be individually controlled to emit light or not emit light.

[0032] The conductive component 400 is electrically connected to the light source component 300, and the conductive component 400 provides electrical energy to the light source component 300, thereby illuminating the light source component 300. The conductive component 400 is mounted on the support assembly 100, and the support assembly 100 provides fixed support for the conductive component 400.

[0033] In the optional embodiment of this utility model, a lens is installed between the light source 300 and the filter 200.

[0034] Specifically, each light source 300 is provided with a lens, which can be a convex lens. One end of the convex lens is connected to the light source 300, and the other end corresponds to the light-transmitting port. The periphery of the convex lens abuts against the partition structure.

[0035] The lens configuration enables strong light from the light source 300 while also making the overall structure of the light source assembly more compact.

[0036] In the optional embodiment of this utility model, the light source element 300 is circular, the support assembly 100 is square, and multiple light source elements 300 are spaced apart along the width and / or length direction of the support assembly 100. Correspondingly, the shape of the area where the light source elements 300 are installed formed by the partition structure can be circular, square, triangular, or irregular. Wherein, multiple light source elements 300 are spaced apart along the width and / or length direction of the support assembly 100 means: multiple light source elements 300 are arranged along the width direction of the support assembly 100; or, multiple light source elements 300 are arranged along the length direction of the support assembly 100; or, see [reference needed]. Figure 1 Multiple light source elements 300 are arranged in a display pattern along the width and length directions of the support assembly 100.

[0037] Alternatively, both the light source element 300 and the support assembly 100 are circular, and multiple light source elements 300 are spaced apart along the circumferential and / or radial direction of the support assembly 100. Correspondingly, the shape of the area formed by the partition structure for mounting the light source elements 300 can be circular, square, triangular, or irregular. Wherein, multiple light source elements 300 spaced apart along the circumferential and / or radial direction of the support assembly 100 means: multiple light source elements 300 are arranged circumferentially along the support assembly 100; or, multiple light source elements 300 are arranged radially along the support assembly 100; or, see [link to relevant documentation]. Figure 4 Multiple light source elements 300 are arranged circumferentially and radially along the support assembly 100.

[0038] Alternatively, the light source element 300 may be square, the support assembly 100 may be circular, and multiple light source elements 300 may be spaced apart circumferentially and / or radially along the support assembly 100. Correspondingly, the shape of the area where the light source elements 300 are mounted, formed by the partition structure, may be circular, square, triangular, or irregular. Wherein, multiple light source elements 300 spaced apart circumferentially and / or radially along the support assembly 100 means: multiple light source elements 300 are arranged circumferentially along the support assembly 100; or, multiple light source elements 300 are arranged radially along the support assembly 100; or, see [link to relevant documentation]. Figure 5 Multiple light source elements 300 are arranged circumferentially and radially along the support assembly 100.

[0039] Alternatively, both the light source element 300 and the support assembly 100 may be square, with multiple light source elements 300 spaced apart along the width and / or length direction of the support assembly 100. Correspondingly, the shape of the area formed by the partition structure for mounting the light source elements 300 may be circular, square, triangular, or irregular. The phrase "multiple light source elements 300 spaced apart along the width and / or length direction of the support assembly 100" means: multiple light source elements 300 are arranged along the width direction of the support assembly 100; or, multiple light source elements 300 are arranged along the length direction of the support assembly 100; or, multiple light source elements 300 are arranged in an array along both the width and length directions of the support assembly 100.

[0040] Alternatively, multiple light sources 300 may be arranged in an irregular shape, which is not limited here.

[0041] The structure and shape of the support component 100 are illustrated below: In a first embodiment, the support assembly 100 includes a substrate 110. The substrate 110 has a number of first grooves 111 greater than or equal to the number of light source elements 300. The bottom wall of the first groove 111 has a second groove 112. The light source elements 300 are installed in the first groove 111, and the conductive elements 400 are installed in the second groove 112. The sidewalls of the first groove 111 form a partition structure. The filter element 200 covers the opening end of the first groove 111.

[0042] Specifically, see Figure 2 The substrate 110 has multiple first grooves 111, the number of which is the same as the number of light source elements 300. At least a portion of the bottom of each first groove 111 is recessed inward to form a second groove 112. A conductive element 400 is fixedly disposed within the second groove 112. The light source element 300 is electrically connected to the conductive element 400 and disposed within the first groove 111. The sidewalls of the first groove 111 form a partition structure. The shapes of the first groove 111 and the second groove 112 can be circular, square, rectangular, triangular, or irregular shapes. Furthermore, the depth of each first groove 111 is greater than the height of the corresponding light source element 300. By independently encapsulating each light source element 300 and providing a filter element 200, spectral tailing can be suppressed, and beam crosstalk between different light source elements 300 can be prevented. In this embodiment, the conductive element 400 is a circuit board.

[0043] In addition, the number of first grooves 111 is greater than the number of light source elements 300, so that some first grooves 111 can be reserved for use when the number of light source elements 300 is expanded in the future.

[0044] A first groove 111 and a second groove 112 are provided on the substrate 110 to support and fix the light source 300 and the conductive component 400. The sidewall of the first groove 111 is used to physically isolate two adjacent light source components 300 to prevent light crosstalk.

[0045] In the optional solution provided by this utility model embodiment, a gap is provided between two adjacent first grooves 111 to further prevent beam crosstalk between different light source components 300.

[0046] In the optional solution provided by this utility model embodiment, the filter element 200 is engaged with the side wall of the first groove 111.

[0047] Specifically, the sidewall of the first groove 111 is provided with a snap-fit ​​groove, and the outer edge of the filter element 200 is inserted into the snap-fit ​​groove. Alternatively, the sidewall of the first groove 111 is provided with a snap-fit ​​protrusion, and the outer edge of the filter element 200 overlaps or snaps onto the snap-fit ​​protrusion. Furthermore, when the filter element 200 is directly installed on the sidewall of the first groove 111, the opening end of the first groove 111 is the aforementioned light-transmitting port.

[0048] The filter element 200 is engaged with the side wall of the first groove 111, so that the filter element 200 is installed on the first groove 111, thereby achieving the function of suppressing spectral tailing and filtering stray light.

[0049] Alternatively, the filter element 200 is bonded to the sidewall of the first groove 111.

[0050] Alternatively, the support assembly 100 may also include a support frame 120, which is mounted at the opening end of the first groove 111 and connected to the top wall of the substrate 110, and the filter is mounted on the support frame 120.

[0051] Specifically, the support frame 120 has a frame structure with a central cutout forming the aforementioned light-transmitting opening. The filter 200 is bonded to the top wall of the support frame 120. Furthermore, the inner wall of the support frame 120 is flush with the inner wall of the first groove 111. The support frame 120 enhances the isolation effect on the light source 300, further preventing beam crosstalk between different light sources 300.

[0052] In the optional embodiment of this utility model, the support component 100 further includes a baffle wall, which is disposed on the top wall of the substrate 110 or the top wall of the support frame 120, and the baffle wall surrounds the outer periphery of the light source component 300.

[0053] Specifically, when the support assembly 100 does not have a support frame 120, the top wall of the substrate 110 has a baffle extending perpendicular to the optical path direction. The baffle and the substrate 110 can be configured as separate structures or as an integral structure. When the support assembly 100 includes a support frame 120, the top wall of the support frame 120 has a baffle extending perpendicular to the optical path direction. The baffle and the support frame 120 can be configured as separate structures or as an integral structure.

[0054] The barrier surrounds the outer periphery of the first groove 111, further enhancing the isolation effect on the light source 300 and preventing crosstalk between different light source components 300.

[0055] In a second embodiment, the support assembly 100 includes a heat sink 140, a mounting frame 130, and pads 150, with the pads 150, heat sink 140, and conductive element 400 stacked sequentially from bottom to top; the mounting frame 130 is mounted on the conductive element 400; a first groove 131 is formed between the mounting frame 130 and the conductive element 400, and the sidewall of the mounting frame 130 is recessed outward to form a second groove 132 communicating with the first groove 131; a light source element 300 is mounted in the first groove 131, and a filter element 200 is mounted in the second groove 132; the sidewall of the first groove 131 forms a partition structure.

[0056] Specifically, the heat sink 140 is made of ceramic material; see [link to relevant documentation]. Figure 3A heat sink 140 is mounted on the upper surface of the pad 150, a conductive element 400 is mounted on the upper surface of the heat sink 140, and a mounting frame 130 is mounted on the upper surface of the conductive element 400. Below the pad 150 is a substrate 110 made of the same material as in the first embodiment, and in this embodiment, the top wall of the substrate 110 is planar. The material and function of the substrate 110 are the same as those in the first embodiment, only the shape is different. The mounting frame 130 forms a first groove 131 and a second groove 132 that are vertically connected, with the size of the first groove 131 being larger than the size of the second groove 132. In this embodiment, the conductive element 400 is configured as a circuit layer, which is connected to the light source element 300 to supply power to the light source element 300; a circuit board is connected outside the circuit layer.

[0057] The mounting frame 130 has a first groove 131 and a second groove 132 that are connected vertically inside, which are used to install the light source component 300 and the filter component 200 respectively, thus realizing independent encapsulation of each light source component 300.

[0058] Both of the above-described implementations of the support component 100 use physical isolation to independently encapsulate each light source 300 and install a corresponding filter 200. This allows the light source 300 in each wavelength band to work independently without cross-excitation. While avoiding crosstalk between the light source 300, it also suppresses spectral tailing and filters out stray light. As a result, when the light source component is applied to a spectral detection device, the spectral detection device has a high signal-to-noise ratio and improved detection sensitivity.

[0059] Example 2 The spectral detection device provided in this embodiment includes the light source component described in Embodiment 1, and therefore also possesses all the beneficial effects of Embodiment 1, which will not be repeated here.

[0060] In the optional embodiment of this utility model, the spectral detection device includes, in sequence along the optical path, a light source assembly, a light homogenizing component 500, a collimating component 600, and a photodetector 700; the first incident light provided by the light source assembly passes sequentially through the light homogenizing component 500, the collimating component 600, and the object to be measured, and is received by the receiving end of the photodetector 700.

[0061] Specifically, the collimating component 600 is configured as an aspherical lens, capable of collimating the light beam passing through the homogenizing component 500. The analyte is the sample substance detected by the spectral detection device. Specifically, if the spectral detection device is used for water environment detection, the analyte can be water in a body of water, such as a river, lake, ocean, or reservoir. Optionally, a transparent sample box can be provided in the light beam transmission path to contain the water. The receiving end of the photodetector 700 is provided with a quantum dot layer. Quantum dots have a wide spectral response range, covering the ultraviolet (wavelength 200nm~380nm), visible light (380nm~780nm) to near-infrared (wavelength above 780nm) range.

[0062] The light source assembly is used to provide the first incident light, the light homogenizing component 500 is used to homogenize the light spot of the first incident light, the collimating component 600 is used to collimate the homogenized first incident light, and the receiving end of the photodetector 700 faces the collimating component 600, and the receiving area thereon is used to receive the first incident light passing through the object under test for spectral detection.

[0063] In the optional embodiment of this utility model, the spectral detection device further includes a housing, and the light source assembly, the light homogenizing component 500, the collimating component 600 and the photodetector 700 are all installed inside the housing.

[0064] Specifically, the housing has a recessed area to accommodate the analyte. A first window and a second window, made of transparent material, are respectively located on the two side walls of the recessed area. The light beam emitted by the light source component passes sequentially through the homogenizing component 500 and the collimating component 600, and then passes through the first window, the analyte, and the second window before entering the receiving area of ​​the receiving end of the photodetector 700. By providing the recessed area, the spectroscopic detection device can be directly placed in the environment where the analyte is located, such as in the liquid to be tested, allowing for direct spectroscopic detection. Compared to traditional chemical methods that require taking the analyte to a laboratory for testing, this method enables in-situ, real-time detection, resulting in higher efficiency and accuracy.

[0065] In the optional solution provided by the present invention, the light source assembly can also provide a second incident light, which is a reference beam that does not pass through the object under test.

[0066] Specifically, the photodetector 700 also includes a second region where the reference beam is directly incident. The second region has a quantum dot layer, identical to the receiving region, and will not be described further. A certain distance is maintained between the receiving region and the second region, or a structure is provided to prevent interference between the first and second incident light beams, thereby preventing crosstalk between the light in the receiving region and the second region, improving their respective signal-to-noise ratios, and thus improving the accuracy of the measurement results. The size of this distance or the dimensions and shape of the structure should be such that the first and second incident light beams do not generate crosstalk or mutual interference during spectral detection.

[0067] By setting a reference beam, the systematic error of the spectral detection device can be calibrated, thereby improving the stability and long-term reliability of spectral detection.

[0068] The structure of the light-diffusing component is described in detail below: In one embodiment, the light homogenizing component 500 has a light outlet and a light inlet at both ends, the size of the light outlet is larger than the size of the light inlet, and the inner wall of the light homogenizing component 500 is provided with a high reflectivity film layer; the light source assembly is installed on one side of the light inlet of the light homogenizing component 500, and the first incident light of the light source assembly is incident on the collimating component 600 after being reflected multiple times by the inner wall of the light homogenizing component 500.

[0069] Specifically, see Figure 6 The light-diffusing component 500 is a reflector cup. The reflector cup is horn-shaped and has an open structure at both ends. The bottom dimension of the reflector cup is smaller than the top dimension. The side wall of the reflector cup is an arc shape that bulges outward from the middle. The light source component is set at the bottom of the cup, and the top of the reflector cup is equipped with a package.

[0070] The light source component at the bottom of the reflector cup emits light, which is reflected multiple times on the inner wall of the reflector cup before exiting from the top, forming a uniform first incident light spot.

[0071] In another embodiment, the light homogenizing component 500 has multiple optical fiber input ends and one optical fiber output end, the number of optical fiber input ends being equal to the number of light source components 300; each optical fiber input end is connected to the light source assembly, and the optical fiber output end is connected to the collimating component 600. The first incident light from the light source assembly enters the light homogenizing component 500 through each optical fiber input end, and after multiple reflections within the light homogenizing component 500, it exits from the optical fiber output end to the collimating component 600.

[0072] Specifically, the light-uniforming component 500 is an optical fiber structure, which can be configured as a single multi-core optical fiber or a composite optical fiber bundle; wherein, the optical fiber input end is connected to the light source assembly through a connector, and the optical fiber output end is connected to the collimation component 600.

[0073] The light emitted by the light source component enters the fiber structure through the light inlet of the fiber, undergoes multiple total internal reflections within the fiber structure, and then exits from the light outlet of the fiber, forming a uniform incident light spot. After passing through the collimating component 60°, it forms a uniform and collimated beam.

[0074] In another embodiment, the light homogenizing component 500 includes a hollow cavity with an inlet and an outlet disposed opposite to each other. The inlet is opposite to the light source assembly. The first incident light from the light source assembly enters the interior of the light homogenizing component 500 through the inlet and undergoes multiple diffuse reflections before entering the collimating component 600 through the outlet.

[0075] Specifically, the light-homing component 500 is an integrating sphere, and the size of the light inlet of the integrating sphere is larger than the light-emitting area of ​​the light source component, thereby ensuring effective light entry. Furthermore, the diameter D of the integrating sphere and the diagonal length L of the light source component satisfy 1.5L≤D≤3L, thereby achieving miniaturization of the spectral detection device while ensuring uniformity.

[0076] A light source assembly is installed at the light inlet to receive the first incident light. The inner wall of the sphere is coated with a high-reflectivity coating with a reflectivity of ≥95%, which allows the incident light to undergo multiple diffuse reflections within the sphere, thereby forming a uniform light spot on the detector. A lens, such as an aspherical lens or a Fresnel lens, is installed at the light outlet to reduce the light outlet angle and achieve a focusing effect, thereby suppressing edge attenuation at the light outlet of the integrating sphere, reducing the deviation of the light intensity, further improving the uniformity of the light spot, and increasing the light energy utilization rate.

[0077] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0078] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A light source assembly, characterized in that, include: Support assembly (100), at least one filter (200) and multiple light source components (300); Multiple light sources (300) are mounted on the support assembly (100) and are spaced apart; at least one of the multiple light sources (300) has a different emission wavelength than the other light sources (300); The support assembly (100) has a partition structure, which separates two adjacent light sources (300) from each other. The partition structure extends upward from the plane containing the bottom surface of the light source (300), and the top surface of the partition structure is higher than the top surface of each light source (300). At least one of the filter elements (200) is mounted on the support assembly (100), and at least one of the light source elements (300) is provided with the filter element (200).

2. The light source assembly according to claim 1, characterized in that, The light source assembly further includes a conductive element (400), which is mounted on the support assembly (100) and located on the side of the light source element (300) away from the filter element (200); the conductive element (400) is electrically connected to the light source element (300).

3. The light source assembly according to claim 2, characterized in that, The support assembly (100) includes a substrate (110), the substrate (110) having a number of first grooves (111) greater than or equal to the number of light source elements (300), the sidewalls of the first grooves (111) forming the partition structure, the bottom wall of the first grooves (111) having a second groove (112), the light source elements (300) being installed in the first grooves (111), the conductive element (400) being installed in the second grooves (112); and the filter element (200) covering the opening end of the first groove (111).

4. The light source assembly according to claim 3, characterized in that, The filter element is engaged or bonded to the side wall of the first groove (111).

5. The light source assembly according to claim 3, characterized in that, The support assembly (100) further includes a support frame (120), which is installed at the opening end of the first groove (111) and connected to the top wall of the substrate (110), and the filter is installed on the support frame (120).

6. The light source assembly according to claim 5, characterized in that, The support assembly (100) further includes a retaining wall disposed on the top wall of the substrate (110) or the top wall of the support frame (120), and the retaining wall surrounds the outer periphery of the light source (300).

7. The light source assembly according to claim 2, characterized in that, The support assembly (100) includes a mounting frame (130), a heat sink (140), and pads (150), wherein the pads (150), the heat sink (140), and the conductive element (400) are stacked sequentially from bottom to top; the mounting frame (130) is mounted on the conductive element (400). A first groove (131) is formed between the mounting frame (130) and the conductive element (400), and the sidewall of the mounting frame (130) is recessed outward to form a second groove (132) communicating with the first groove (131); the light source element (300) is installed in the first groove (131), and the filter element (200) is installed in the second groove (132); the sidewall of the first groove (131) forms the partition structure.

8. The light source assembly according to any one of claims 1-7, characterized in that, A lens is installed between the light source (300) and the filter (200).

9. A spectral detection device, characterized in that, Along the optical path direction, it sequentially includes a light source assembly, a light homogenizing component (500), a collimating component (600), and a photodetector (700) as described in any one of claims 1-8. The first incident light from the light source assembly passes sequentially through the homogenizing component (500), the collimating component (600), and the object under test, and is received by the receiving end of the photodetector (700).

10. The spectral detection device according to claim 9, characterized in that, The light-diffusing component (500) has a light-exit port and a light-in port at its two ends, respectively. The size of the light-exit port is larger than that of the light-in port, and a reflective film layer is provided on the inner wall of the light-diffusing component (500). The light source assembly is installed on one side of the light-in port of the light-diffusing component (500). The first incident light from the light source assembly is incident on the collimating component (600) after being reflected multiple times by the inner wall of the light-diffusing component (500). Alternatively, the light homogenizing component (500) has multiple optical fiber input ends and one optical fiber output end, the number of optical fiber input ends being equal to the number of light source components (300); each optical fiber input end is connected to the light source assembly, and the optical fiber output end is connected to the collimating component (600); the first incident light from the light source assembly enters the light homogenizing component (500) through each optical fiber input end, and after multiple reflections within the light homogenizing component (500), it exits from the optical fiber output end to the collimating component (600). Alternatively, the light homogenizing component (500) includes a hollow cavity with an inlet and an outlet disposed opposite to each other. The inlet is opposite to the light source assembly. The first incident light from the light source assembly enters the interior of the light homogenizing component (500) through the inlet and undergoes multiple reflections before entering the collimating component (600) through the outlet.

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