A photoelectric conversion module and a spectral detector

Abstract

The embodiment of the present application provides a photoelectric conversion module and a spectrum detector, which comprise a light filtering assembly and a photoelectric detection assembly. The light filtering assembly comprises a mounting seat and a light filter arranged on the mounting seat. The mounting seat has an entrance light area. The light filter is used for filtering and reflecting the light rays to be measured entering the entrance light area. The photoelectric detection assembly is connected to at least one side of the light filtering assembly along a first direction, so that the photoelectric conversion module is installed as a preassembled whole into the spectrum detector. The photoelectric detection assembly comprises a fixing seat and a focusing lens and a photoelectric detector arranged on the fixing seat. The focusing lens is arranged face to face with the light filter, so as to transmit the light rays filtered by the light filter to the photoelectric detector. The photoelectric detector is arranged on the side of the focusing lens away from the light filter, and is used for converting the fluorescent signal into an electric signal. The photoelectric conversion module of the present application can improve the compactness and stability of the overall structure, simplify the assembly process of the whole spectrum detector, and also facilitate the realization of multi-channel detection.

Description

Technical Field

[0001] This application relates to the field of optical instruments, and more particularly to a photoelectric conversion module and a spectral detector. Background Technology

[0002] Taking the application of spectral detectors in the biological and medical fields as an example, spectral detectors can be used as part of flow cytometers to count and classify different cells. Since the fluorescence spectra generated by multiple lasers of different wavelengths exciting the same specific fluorescent dye will overlap, it is necessary to collimate, disperse, and filter the light to separate the fluorescence signals into different wavelengths, which are then received by a photodetector. Computer software then analyzes the fluorescence signals of different wavelengths one by one to count the types and quantities of particles in the sample.

[0003] In related technologies, during installation, the filter components used for filtering are first installed on the base, and then the photoelectric detection components used for detection are installed on the base, with the filter components spaced apart. This is inconvenient to install, occupies a lot of space, and is not convenient to increase the number of photoelectric detection components in a limited space. Utility Model Content

[0004] In view of this, embodiments of this application aim to provide a photoelectric conversion module and a spectral detector, in which the filter component and the photoelectric detection component are integrated into a single module, which is easy to install and reduces the space occupied.

[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0006] This application provides a photoelectric conversion module for a spectral detector, including:

[0007] A light filtering assembly, comprising a mounting base and a filter disposed on the mounting base, the mounting base having an incident light area, and the filter being used to filter and reflect the light to be measured entering the incident light area;

[0008] A photoelectric detection component is connected to at least one side of the filter component along a first direction, so that the photoelectric conversion module is installed as a pre-assembled whole into the spectral detector; the photoelectric detection component includes a mounting base and a focusing lens and a photodetector disposed on the mounting base, the focusing lens being disposed face-to-face with the filter to transmit the light filtered by the filter to the photodetector, and the photodetector being disposed on the side of the focusing lens away from the filter for converting fluorescence signals into electrical signals.

[0009] In some embodiments, the number of photoelectric detection components is two, one photoelectric detection component is connected to a first side of the filter component along a first direction, and the other photoelectric detection component is connected to a second side of the filter component along a first direction, with the first side and the second side being arranged opposite to each other;

[0010] And / or, the photoelectric conversion module includes at least one connector that connects the mounting base and the fixing base to achieve the connection between the photoelectric detection component and the filter component.

[0011] In some embodiments, the light incident area extends through the mounting base along a second direction;

[0012] The number of filters is multiple, and the mounting base is provided with multiple first mounting holes and multiple second mounting holes respectively communicating with the light incident area. The multiple first mounting holes are provided on a first side of the mounting base along a first direction and spaced apart along a second direction, and the multiple second mounting holes are provided on a second side of the mounting base along a second direction and spaced apart along a second direction.

[0013] The filter assembly includes at least one concave mirror, which is used to focus the light to be tested entering the incident light area and reflect it to the filter.

[0014] The plurality of filters are respectively disposed in each of the first mounting holes, and the at least one concave mirror is disposed in each of the second mounting holes; or, a portion of the plurality of filters are disposed in a portion of the first mounting holes, and another portion is disposed in a portion of the second mounting holes, and the concave mirror is disposed in another portion of the first mounting holes and another portion of the second mounting holes;

[0015] Wherein, the first direction is perpendicular to the second direction.

[0016] In some implementations, one of the mounting base and the fixing base is provided with a positioning structure, and the other is provided with a mating structure. The positioning structure and the mating structure cooperate to achieve a positioning connection between the mounting base and the fixing base.

[0017] In some embodiments, the positioning structure includes a first positioning surface, a second positioning surface, and a support surface disposed on the mounting base. The filter is exposed on the first positioning surface. The second positioning surface is connected to at least one end of the first positioning surface along a second direction and protrudes toward the fixed base. The support surface connects the first positioning surface and the second positioning surface. The mating structure includes a protrusion protruding from the fixed base toward the mounting base. The protrusion abuts against the support surface and moves through the second positioning surface to partially fit against the first positioning surface. The first direction is perpendicular to the second direction.

[0018] In some implementations, the focusing lens corresponds one-to-one with the filter;

[0019] The mounting base is provided with at least one through slot, the focusing lens is disposed on the side of the through slot near the filter assembly and spaced apart from the filter; at least a portion of the photodetector is disposed on the side of the through slot away from the filter assembly and spaced apart from the focusing lens.

[0020] In some embodiments, the mounting base has a first surface, the through slot extends through the first surface, and the focusing lens is exposed on the first surface;

[0021] The mounting base has a first positioning surface, the filter is exposed on the first positioning surface, and the first positioning surface is disposed face to face with the first surface.

[0022] The first surface is inclined relative to the first positioning surface, and the angle between the first surface and the first positioning surface is the reflection angle of the filter.

[0023] In some embodiments, the mounting base further includes an arc-shaped guide groove connected to the side of the through groove facing the mounting base, and the focusing lens is mounted to the through groove via the arc-shaped guide groove;

[0024] And / or, a partition wall is provided in the through groove, the aperture of the through groove at the partition wall is smaller than the aperture at the non-partition wall, and the focusing lens and the photodetector respectively abut against the partition wall.

[0025] In some implementations, the photoelectric conversion module further includes a first temperature detector disposed on the bottom side of the mounting base to detect the temperature of the filter assembly;

[0026] And / or, the photoelectric conversion module further includes a second temperature sensor, which is disposed on the mounting base to monitor the temperature of the photoelectric detection component.

[0027] In some embodiments, the top side of the mounting base is provided with an opening that communicates with the light incident area, and the filter is mounted to the mounting base through the opening; the filter assembly includes a top plate that is connected to the top side of the mounting base and closes the opening;

[0028] And / or, the photoelectric conversion module further includes a baffle connected between the mounting base and the fixing base, for isolating the space between the filter and the focusing lens from the external environment.

[0029] This application also provides a spectral detector, including:

[0030] abutment;

[0031] Control module;

[0032] Temperature control module;

[0033] And the photoelectric conversion module described in any embodiment of this application, wherein the photoelectric conversion module, the control module and the temperature control module are respectively disposed on the base, the temperature control module abuts against the filter component, and the control module is used to control the temperature control module to turn on or stop temperature adjustment of the filter component according to the temperature of the filter component.

[0034] The photoelectric conversion module provided in this application embodiment features an overall modular design. On the one hand, it can improve the compactness and stability of the overall structure, simplify the assembly process of the spectral detector, and the filter can efficiently and selectively filter and reflect the light to be measured entering the light-receiving area. Furthermore, the filtered target beam can be transmitted to the focusing lens along the optimal path, enhancing the light intensity reaching the surface of the photodetector and improving the photoelectric conversion efficiency and signal-to-noise ratio. On the other hand, it can also facilitate multi-channel detection, support the simultaneous acquisition of multiple wavelength signals, increase the flexibility and scalability of the module, and adapt to complex spectral detection scenarios with multiple parameters and multiple wavelengths. At the same time, it has high assembly accuracy and mechanical stability, which can reduce the risk of optical path deviation. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a photoelectric conversion module according to an embodiment of this application;

[0036] Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0037] Figure 3 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0038] Figure 4 for Figure 1 The diagram shows the structure of the filter assembly.

[0039] Figure 5 for Figure 1 The diagram shows the structure of the photoelectric detection component.

[0040] Figure 6 for Figure 5 A schematic diagram of the structure shown from another perspective.

[0041] Explanation of reference numerals in the attached figures

[0042] 30 - Photoelectric conversion module;

[0043] 31-Filter assembly; 311-Mounting base; 311a-Incident light area; 311b-First mounting hole; 311c-Second mounting hole; 311d-First positioning surface; 311e-Second positioning surface; 311f-Supporting surface; 311g-Opening; 312-Filter; 313-Concave mirror; 32-Photodetector assembly; 321-Fixing base; 321a-Through groove; 321b-First surface; 321c-Arc-shaped guide groove; 322-Focusing lens; 323-Photodetector; 324-Protrusion; 33-Connector; 34-First temperature detector; 35-Second temperature detector; 36-Top plate; 37-Baffle. Detailed Implementation

[0044] In the description of the embodiments of this application, it should be noted that the terms "height direction", "up", "down", "top", "bottom", "left", "right", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and 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 the embodiments of this application.

[0045] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] This application provides a photoelectric conversion module 30 for use in a spectral detector.

[0047] A spectrometer is a device used to analyze the optical properties of substances, such as absorption, emission, and scattering. It determines the composition and structure of a sample by measuring the intensity of light at different wavelengths. Spectrometers can be applied in fields such as biology and medicine.

[0048] This application uses the application of a spectral detector in a particle analyzer as an example for illustration.

[0049] Particle analyzers can use a variety of techniques to measure the size, shape, concentration and other physicochemical properties of particles.

[0050] Taking flow cytometry in particle analyzers as an example, after cells are labeled with fluorescent markers, multiple lasers of different wavelengths excite the same specific fluorescent dye. The resulting fluorescence spectra will overlap. After collimation, spectral dispersion, and filtering by a spectral detector, the fluorescence signals are separated into different wavelengths and converted into electrical signals. Computer software analyzes the fluorescence signals of different wavelengths one by one to count the types and quantities of particles in the sample.

[0051] For example, the spectral detector also includes a dichroic mirror assembly and a lateral diffraction optical assembly. After the sample to be tested is excited by a laser, the generated light is transmitted to the spectral detector via an optical fiber. The light is collimated and then transmitted to the dichroic mirror assembly. The dichroic mirror assembly includes two sets of dichroic mirrors. One set of dichroic mirrors receives the collimated light and transmits the fluorescence signal in the light to the other set of dichroic mirrors, and transmits the side-scattered light signal in the light to the lateral diffraction optical assembly. The other set of dichroic mirrors reflects and disperses the fluorescence signal and transmits it to the photoelectric conversion module 30. The photoelectric conversion module 30 filters the fluorescence signal and converts it into an electrical signal to count the types and quantities of particles in the sample. The lateral diffraction optical assembly converts the scattered light signal into an electrical signal to reflect the shape and size of the particles.

[0052] Please see Figures 1 to 6 The photoelectric conversion module 30 includes a filter component 31 and a photoelectric detection component 32.

[0053] The filter assembly 31 includes a mounting base 311 and a filter 312 disposed on the mounting base 311. The mounting base 311 has an incident light area 311a, and the filter 312 is used to filter and reflect the light to be measured entering the incident light area 311a.

[0054] The photoelectric detection component 32 is connected to at least one side of the filter component 31 along the first direction, so that the photoelectric conversion module 30 is installed as a pre-assembled whole into the spectral detector. The photoelectric detection component 32 includes a mounting base 321 and a focusing lens 322 and a photoelectric detector 323 disposed on the mounting base 321. The focusing lens 322 is disposed face-to-face with the filter 312 to transmit the light filtered by the filter 312 to the photoelectric detector 323. The photoelectric detector 323 is disposed on the side of the focusing lens 322 away from the filter 312 and is used to convert the fluorescence signal into an electrical signal.

[0055] Mounting base 311 serves as a support and fixing structure for filter 312, facilitating precise assembly of filter 312. Light entrance area 311a guides the light to be measured into the filter, and filter 312 selectively filters or reflects the light, filtering fluorescence signals of specific wavelengths for transmission to photoelectric detection component 32.

[0056] The filter 312 can be a bandpass filter, a cutoff filter, a beam splitter, etc. During detection, filters 312 with different wavelength response characteristics can be placed according to requirements.

[0057] Mounting base 311 can be made of metal or high-stability plastic, with sufficient mechanical strength and thermal stability to increase the installation stability of filter 312 and provide a relatively stable thermal environment.

[0058] The mounting base 321 supports the focusing lens 322 and the photodetector 323. The focusing lens 322 can focus the light beam output from the filter 312, thereby improving the photoelectric detection efficiency. The photodetector 323 converts the received fluorescence signal into an electrical signal.

[0059] The focusing lens 322 and the filter 312 are arranged face to face to form an optimal optical path, while reducing scattering loss and improving light utilization.

[0060] The focusing lens 322 can be an aspherical lens. The photodetector 323 can be a photodiode, avalanche photodiode, photomultiplier tube, etc.

[0061] For example, the photodetector 323 is an avalanche photodiode, which operates based on the photoelectric effect and the avalanche multiplication effect. When an incident photon strikes a semiconductor material, electron-hole pairs are generated. Under the action of a reverse bias voltage, these charge carriers are accelerated by the electric field and collide to generate new electron-hole pairs, forming a chain reaction, the so-called "avalanche." This self-sustaining collisional ionization process leads to a sharp increase in current, thereby amplifying the optical signal.

[0062] The photoelectric detection component 32 is connected to at least one side of the filter component 31 along the first direction. Alternatively, the photoelectric detection component 32 can be connected to one side of the filter component 31 along the first direction, or it can be connected to opposite sides of the filter component 31 along the first direction. In this case, one filter component 31 can be adapted to at least two photoelectric detection components 32, which can realize multi-channel spectral detection, increase system integration, and save space.

[0063] The photoelectric conversion module 30 is installed into the spectral detector as a pre-assembled whole. This means that the filter component 31 and the photoelectric detection component 32 are first assembled into a pre-assembled whole and then installed into the spectral detector. The filter component 31 and the photoelectric detection component 32 are integrated into a unified module, which simplifies the installation process and increases the ease of installation.

[0064] The photoelectric conversion module 30 provided in this application embodiment has an overall modular design. On the one hand, it can improve the compactness and stability of the overall structure and simplify the assembly process of the entire spectral detector. The filter 312 can efficiently and selectively filter and reflect the light to be measured entering the light-receiving area 311a. Furthermore, the filtered target beam can be transmitted to the focusing lens 322 along the optimal path, enhancing the light intensity reaching the surface of the photoelectric detector 323 and improving the photoelectric conversion efficiency and signal-to-noise ratio. On the other hand, it can also facilitate multi-channel detection, support the simultaneous acquisition of multiple wavelength signals, increase the flexibility and scalability of the module, and adapt to complex spectral detection scenarios with multiple parameters and multiple wavelengths. At the same time, the assembly accuracy and mechanical stability are high, which can reduce the risk of optical path deviation.

[0065] In some embodiments, please refer to Figures 1 to 3 The number of photoelectric detection components 32 is two. One photoelectric detection component 32 is connected to the first side of the filter component 31 along the first direction, and the other photoelectric detection component 32 is connected to the second side of the filter component 31 along the first direction. The first side and the second side are arranged opposite to each other.

[0066] In this embodiment, a photoelectric detection component 32 can be respectively provided on both sides of the filter component 31. The photoelectric detection components 32 on both sides can convert fluorescence signals of different wavelengths into electrical signals, reduce the waste of optical signals, and thus increase detection accuracy and detection efficiency.

[0067] In some embodiments, please refer to Figure 1 The photoelectric conversion module 30 includes at least one connector 33, which connects the mounting base 311 and the fixing base 321 to realize the connection between the photoelectric detection component 32 and the filter component 31.

[0068] In this embodiment, the connector 33 is used to connect the mounting base 311 and the fixing base 321, thereby realizing a stable connection and positioning between the photoelectric detection component 32 and the filter component 31, improving the overall mechanical stability of the photoelectric conversion module 30, and also improving the reliability of optical alignment and assembly accuracy.

[0069] The connector 33 can act as a bridge to connect the filter assembly 31 and the photoelectric detection assembly 32 into one unit. During the assembly process, the connector 33 can help to achieve precise face-to-face alignment between the filter 312 and the focusing lens 322, so that the components have a stable relative positional relationship and will not be displaced or loosened due to vibration or external force.

[0070] The specific construction of the connector 33 is not limited; for example, it may be a screw, or a combination of a bolt and a nut.

[0071] In some embodiments, please refer to Figure 1 and Figure 4The light-entry area 311a penetrates the mounting base 311 along the second direction.

[0072] There are multiple filters 312. The mounting base 311 is provided with multiple first mounting holes 311b and multiple second mounting holes 311c that are respectively connected to the light incident area 311a. The multiple first mounting holes 311b are located on a first side of the mounting base 311 along a first direction and are spaced apart along a second direction. The multiple second mounting holes 311c are located on a second side of the mounting base 311 along a second direction and are spaced apart along a second direction.

[0073] The filter assembly 31 includes at least one concave mirror 313, which is used to focus the light to be tested entering the incident light area 311a and reflect it to the filter 312.

[0074] The concave mirror 313 can focus the light from the incident light area 311a and reflect it to the filter 312, thereby increasing the intensity of the incident light, optimizing the filtering effect, and thus improving the detection accuracy. For example, the concave mirror 313 can be a plano-concave spherical reflector.

[0075] In some embodiments, multiple filters 312 are respectively disposed in each first mounting hole 311b, and at least one concave mirror 313 is disposed in each second mounting hole 311c.

[0076] In this embodiment, the first mounting hole 311b is used to mount the filter 312, and the second mounting hole 311c is used to mount the concave mirror 313. The concave mirror 313 focuses and reflects light onto the corresponding filter 312, further increasing the detection accuracy. In this embodiment, the number of photoelectric detection components 32 can be one, with one filter component 31 cooperating with one photoelectric detection component 32. The number of concave mirrors 313 can be the same as the number of filters 312, which can increase the detection accuracy.

[0077] In other embodiments, please refer to Figure 4 A portion of the multiple filters 312 are disposed in a portion of the first mounting hole 311b, and another portion is disposed in a portion of the second mounting hole 311c. The concave mirror 313 is disposed in another portion of the first mounting hole 311b and another portion of the second mounting hole 311c; wherein, the first direction is perpendicular to the second direction.

[0078] In this embodiment, the first mounting hole 311b can be used to mount the filter 312 and the concave mirror 313, and the second mounting hole 311c can also be used to mount the filter 312 and the concave mirror 313. The concave mirror 313 at the first mounting hole 311b can reflect light to the filter 312 at the second mounting hole 311c, and the concave mirror 313 at the second mounting hole 311c can reflect light to the filter 312 at the first mounting hole 311b. In this way, the number of filters 312 can be large, and one filter component 31 can be adapted to two photoelectric detection components 32, realizing the setting of dual-sided filters 312, increasing the detection range, and improving the detection reliability.

[0079] The first direction and the second direction can be perpendicular to each other with the top and bottom directions of the photoelectric conversion module 30.

[0080] In some embodiments, one of the mounting base 311 and the fixing base 321 is provided with a positioning structure, and the other is provided with a mating structure. The positioning structure and the mating structure cooperate to achieve a positioning connection between the mounting base 311 and the fixing base 321.

[0081] In this embodiment, the positioning structure and the mating structure are configured to achieve high-precision positioning between the filter component 31 and the photoelectric detection component 32, ensuring that the optical axis between the filter 312 and the focusing lens 322 is aligned, avoiding optical signal loss or detection error due to offset, and increasing docking reliability.

[0082] In some embodiments, please refer to Figure 1 , Figure 4 and Figure 5 The positioning structure includes a first positioning surface 311d, a second positioning surface 311e, and a support surface 311f disposed on the mounting base 311. The filter 312 is exposed on the first positioning surface 311d. The second positioning surface 311e is connected to at least one end of the first positioning surface 311d along a second direction and protrudes toward the fixed base 321. The support surface 311f connects the first positioning surface 311d and the second positioning surface 311e. The mating structure includes a protrusion 324 protruding from the fixed base 321 on the side facing the mounting base 311. The protrusion 324 abuts against the support surface 311f and moves through the second positioning surface 311e to partially fit against the first positioning surface 311d.

[0083] The fact that the filter 312 is exposed on the first positioning surface 311d means that the first positioning surface 311d will not block the filter 312, so that the filter 312 can filter the light to the focusing lens 322.

[0084] The support surface 311f is used to provide contact and support when the mounting base 311 and the fixed base 321 are assembled. During installation, the fixed base 321 is supported on the support surface 311f and moves to contact the first positioning surface 311d through the second positioning surface 311e. Thus, the first positioning surface 311d and the second positioning surface 311e are used as positioning references to realize the positioning docking between the fixed base 321 and the mounting base 311. There is no need to set up an alignment structure. The connector 33 can pass through the fixed base 321 and the mounting base 311 to realize the connection between the filter component 31 and the photoelectric detection component 32.

[0085] In this embodiment, multi-point positioning ensures a stable and reliable spatial relationship between the mounting base 311 and the fixing base 321, so as to facilitate the alignment between the filter 312 and the focusing lens 322, prevent misalignment, improve assembly efficiency and consistency, and ensure assembly accuracy.

[0086] In some embodiments, the focusing lens 322 corresponds one-to-one with the filter 312. That is, each focusing lens 322 corresponds to one filter 312. The focusing lens 322 is used to receive the specific wavelength light signal filtered by the corresponding filter 312 and focus it onto the corresponding photodetector 323.

[0087] Please see Figure 5 and Figure 6 The mounting base 321 is provided with at least one through groove 321a, the focusing lens 322 is disposed on the side of the through groove 321a near the filter assembly 31 and is spaced apart from the filter 312; at least a portion of the photodetector 323 is disposed on the side of the through groove 321a away from the filter assembly 31 and is spaced apart from the focusing lens 322.

[0088] The through slot 321a provides installation space for the focusing lens 322 and the photodetector 323, provides a channel for light transmission, and also facilitates the photodetector 323 to stably receive fluorescence signals.

[0089] The focusing lens 322 and the filter 312 are spaced apart to ensure a smooth optical path.

[0090] In this embodiment, the through slot 321a integrates the focusing lens 322 and the photodetector 323, shortening the optical path distance and reducing light loss. Simultaneously, it enables independent acquisition of multi-wavelength signals without interference, improving detection accuracy. Furthermore, the structure of the photodetector assembly 32 can be made more compact.

[0091] In some embodiments, please refer to Figure 6 The mounting base 321 has a first surface 321b, a through groove 321a passing through the first surface 321b, and a focusing lens 322 exposed on the first surface 321b.

[0092] Mounting base 311 has a first positioning surface 311d, and filter 312 is exposed on the first positioning surface 311d. The first positioning surface 311d and the first surface 321b are arranged face to face.

[0093] The first surface 321b is inclined relative to the first positioning surface 311d, and the angle between the first surface 321b and the first positioning surface 311d is the reflection angle of the filter 312.

[0094] In this embodiment, the first surface 321b is inclined relative to the first positioning surface 311d, which can form an optimal optical path between the filter 312 and the focusing lens 322, so that the light signal reflected by the filter 312 can enter the focusing lens 322 vertically or approximately vertically, thereby improving the detection sensitivity.

[0095] The tilt angle of the first surface 321b relative to the first positioning surface 311d can be determined by the reflection angle of the filter 312.

[0096] In some embodiments, please refer to Figure 5 and Figure 6 The mounting base 321 also includes an arc-shaped guide groove 321c, which is connected to the side of the through groove 321a facing the mounting base 311. The focusing lens 322 is installed into the through groove 321a via the arc-shaped guide groove 321c.

[0097] For example, the cross-section of the arc-shaped guide groove 321c can be semi-circular.

[0098] In this embodiment, the arc-shaped guide groove 321c provides a guiding path for the installation of the focusing lens 322. The focusing lens 322 can slide through the arc-shaped guide groove 321c to the through groove 321a, so that the focusing lens 322 can be accurately installed in the set position of the through groove 321a, thereby improving assembly efficiency and optical alignment accuracy.

[0099] In some embodiments, a partition wall is provided in the through groove 321a, and the aperture of the through groove 321a at the partition wall is smaller than the aperture at the non-partition wall. The focusing lens 322 and the photodetector 323 respectively abut against the partition wall.

[0100] In this embodiment, the partition wall separates the focusing lens 322 and the photodetector 323, facilitating detection. At the same time, the partition wall also provides positioning support for the focusing lens 322 and the photodetector 323, increasing structural stability.

[0101] It should be noted that the partition wall does not affect the transmission of light from the focusing lens 322 to the photodetector 323.

[0102] In some embodiments, please refer to Figure 3 and Figure 4The photoelectric conversion module 30 also includes a first temperature detector 34, which is disposed on the bottom side of the mounting base 311 to detect the temperature of the filter assembly 31.

[0103] In this embodiment, the first temperature detector 34 can accurately sense the overall temperature change of the filter component 31 and transmit the temperature data to the spectral detector so that the spectral detector can determine whether the temperature of the filter component 31 needs to be adjusted based on the temperature, so that the photoelectric conversion module 30 can work in a suitable temperature environment and avoid performance fluctuations caused by temperature drift.

[0104] In some embodiments, please refer to Figure 1 The photoelectric conversion module 30 also includes a second temperature detector 35, which is mounted on the mounting base 321 to monitor the temperature of the photoelectric detection component 32.

[0105] It is understandable that the sensitivity of the photodetector 323 is affected by temperature. Therefore, it is necessary to ensure that the temperature of the photodetector 32 is within a suitable range in order to maintain the optimal working condition of the photodetector 323.

[0106] Therefore, in this embodiment, a second temperature detector 35 is provided to monitor the operating temperature of the photoelectric detection component 32, ensuring that the photoelectric detector 323 can work within a suitable temperature range and guaranteeing the overall working stability of the photoelectric conversion module 30.

[0107] In some embodiments, please refer to Figure 4 The top side of the mounting base 311 is provided with an opening 311g, which communicates with the light incident area 311a. The filter 312 is installed on the mounting base 311 through the opening 311g. The filter assembly 31 includes a top plate 36, which is connected to the top side of the mounting base 311 and closes the opening 311g.

[0108] In this embodiment, the opening 311g facilitates the insertion of the filter 312 into the mounting base 311 from the top side, enabling connection within the mounting base 311. Then, the top plate 36 is placed on the top side of the mounting base 311 to close the opening 311g, preventing external contaminants from entering and also providing light shielding. Of course, a wiring groove can also be provided at the top plate 36 to enable electrical connection.

[0109] In some embodiments, please refer to Figure 1 The photoelectric conversion module 30 also includes a baffle 37, which is connected between the mounting base 311 and the fixing base 321 to isolate the space between the filter 312 and the focusing lens 322 from the external environment.

[0110] In this embodiment, the baffle 37 can reduce the attenuation or distortion of the light signal caused by environmental interference. At the same time, it prevents the light from scattering and facilitates the light to be concentrated by the filter 312 to the focusing lens 322. Of course, the baffle 37 can also play a role in heat transfer, increasing the heat transfer area between the mounting base 311 and the fixing base 321, so that the heat from the mounting base 311 can be transferred to the fixing base 321, so that the photoelectric detection component 32 can receive the temperature transferred from the filter component 31, thereby increasing the reliability of operation.

[0111] This application also provides a spectral detector, which includes a base, a control module, a temperature control module, and a photoelectric conversion module 30 in any embodiment of this application. The photoelectric conversion module 30, the control module, and the temperature control module are respectively disposed on the base. The temperature control module abuts against the filter component 31. The control module is used to control the temperature control module to turn the temperature of the filter component 31 on or off according to the temperature of the filter component 31.

[0112] Understandably, if the first temperature detector 34 detects that the temperature of the filter component 31 is outside the set range, it can transmit this information to the control module. The control module then controls the temperature control module to adjust the temperature of the filter component 31, restoring it to the set temperature. Simultaneously, the photoelectric detection component 32 can also receive heat transfer. The second temperature detector 35 monitors whether the temperature of the photoelectric detection component 32 is within acceptable limits, ensuring that both the filter component 31 and the photoelectric detection component 32 operate within a suitable temperature range. When the temperature of the filter component 31 is within the set range, the control module can control the temperature control module to stop temperature adjustment.

[0113] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0114] The above description is merely a preferred embodiment of this application and is not intended to limit the 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 scope of protection of this application.

Claims

1. A photoelectric conversion module for use in a spectral detector, characterized in that, include: A light filtering assembly, comprising a mounting base and a filter disposed on the mounting base, the mounting base having an incident light area, and the filter being used to filter and reflect the light to be measured entering the incident light area; A photoelectric detection component is connected to at least one side of the filter component along a first direction, so that the photoelectric conversion module is installed as a pre-assembled whole into the spectral detector; the photoelectric detection component includes a mounting base and a focusing lens and a photodetector disposed on the mounting base, the focusing lens being disposed face-to-face with the filter to transmit the light filtered by the filter to the photodetector, and the photodetector being disposed on the side of the focusing lens away from the filter for converting fluorescence signals into electrical signals.

2. The photoelectric conversion module according to claim 1, characterized in that, The number of photoelectric detection components is two. One photoelectric detection component is connected to the first side of the filter component along the first direction, and the other photoelectric detection component is connected to the second side of the filter component along the first direction. The first side and the second side are arranged opposite to each other. And / or, the photoelectric conversion module includes at least one connector that connects the mounting base and the fixing base to achieve the connection between the photoelectric detection component and the filter component.

3. The photoelectric conversion module according to claim 1, characterized in that, The light incident area extends through the mounting base along the second direction; The number of filters is multiple, and the mounting base is provided with multiple first mounting holes and multiple second mounting holes respectively communicating with the light incident area. The multiple first mounting holes are provided on a first side of the mounting base along a first direction and spaced apart along a second direction, and the multiple second mounting holes are provided on a second side of the mounting base along a second direction and spaced apart along a second direction. The filter assembly includes at least one concave mirror, which is used to focus the light to be tested entering the incident light area and reflect it to the filter. The plurality of filters are respectively disposed in each of the first mounting holes, and the at least one concave mirror is disposed in each of the second mounting holes; or, a portion of the plurality of filters are disposed in a portion of the first mounting holes, and another portion is disposed in a portion of the second mounting holes, and the concave mirror is disposed in another portion of the first mounting holes and another portion of the second mounting holes; Wherein, the first direction is perpendicular to the second direction.

4. The photoelectric conversion module according to claim 1, characterized in that, One of the mounting base and the fixing base is provided with a positioning structure, and the other is provided with a mating structure. The positioning structure and the mating structure cooperate to achieve a positioning connection between the mounting base and the fixing base.

5. The photoelectric conversion module according to claim 4, characterized in that, The positioning structure includes a first positioning surface, a second positioning surface, and a support surface disposed on the mounting base. The filter is exposed on the first positioning surface. The second positioning surface is connected to at least one end of the first positioning surface along a second direction and protrudes toward the fixed base. The support surface connects the first positioning surface and the second positioning surface. The mating structure includes a protrusion protruding from the fixed base toward the mounting base. The protrusion abuts against the support surface and moves through the second positioning surface to partially fit against the first positioning surface. The first direction is perpendicular to the second direction.

6. The photoelectric conversion module according to claim 1, characterized in that, The focusing lens corresponds one-to-one with the filter; The mounting base is provided with at least one through slot, the focusing lens is disposed on the side of the through slot near the filter assembly and spaced apart from the filter; at least a portion of the photodetector is disposed on the side of the through slot away from the filter assembly and spaced apart from the focusing lens.

7. The photoelectric conversion module according to claim 6, characterized in that, The mounting base has a first surface, the through groove extends through the first surface, and the focusing lens is exposed on the first surface; The mounting base has a first positioning surface, the filter is exposed on the first positioning surface, and the first positioning surface is disposed face to face with the first surface. The first surface is inclined relative to the first positioning surface, and the angle between the first surface and the first positioning surface is the reflection angle of the filter.

8. The photoelectric conversion module according to claim 6, characterized in that, The mounting base also includes an arc-shaped guide groove, which is connected to the side of the through groove facing the mounting base, and the focusing lens is mounted to the through groove via the arc-shaped guide groove; And / or, a partition wall is provided in the through groove, the aperture of the through groove at the partition wall is smaller than the aperture at the non-partition wall, and the focusing lens and the photodetector respectively abut against the partition wall.

9. The photoelectric conversion module according to claim 1, characterized in that, The photoelectric conversion module further includes a first temperature detector, which is disposed on the bottom side of the mounting base to detect the temperature of the filter component; And / or, the photoelectric conversion module further includes a second temperature sensor, which is disposed on the mounting base to monitor the temperature of the photoelectric detection component.

10. The photoelectric conversion module according to claim 1, characterized in that, The mounting base has an opening on its top side, which communicates with the light-incident area. The filter is installed onto the mounting base through the opening. The filter assembly includes a top plate, which is connected to the top side of the mounting base and closes the opening. And / or, the photoelectric conversion module further includes a baffle connected between the mounting base and the fixing base, for isolating the space between the filter and the focusing lens from the external environment.

11. A spectral detector, characterized in that, include: abutment; Control module; Temperature control module; And the photoelectric conversion module according to any one of claims 1-10, wherein the photoelectric conversion module, the control module and the temperature control module are respectively disposed on the base, the temperature control module abuts against the filter component, and the control module is used to control the temperature control module to turn on or stop temperature adjustment of the filter component according to the temperature of the filter component.

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