Light filtering device

Abstract

The utility model discloses a light filtering device, and relates to the technical field of optical detection, the light filtering device comprises at least two light filtering modules which are coaxially arranged and a driving module, each light filtering module is provided with a light through hole, the light through holes of any two light filtering modules are coaxially arranged in a first direction, the first direction is parallel to the axial direction of the light filtering modules, and the driving module is arranged on the light filtering modules. The driving module is used for driving the light filtering pieces of the light filtering modules to move relative to the light through holes, so that light rays entering the light filtering device sequentially penetrate through the light through holes of all the light filtering modules and the light filtering pieces of all the light filtering modules and then are emitted, and therefore all the light filtering pieces of the light filtering device are stacked in the three-dimensional space, and the light filtering effect is improved. Therefore, the space occupied by the light filtering device is reduced, and the small size of the light filtering device can be realized.

Description

Technical Field

[0001] This application relates to the field of optical detection technology, and in particular to a filter device. Background Technology

[0002] Digital polymerase chain reaction (DPCR) is an absolute quantification technique for nucleic acid molecules, a highly sensitive method developed after real-time quantitative polymerase chain reaction (RQPCR). DPCR instruments divide the reaction system into numerous independent microreaction units for PCR amplification and calculate nucleic acid copy numbers based on Poisson distribution and positive ratios using optical detection equipment to achieve quantitative analysis. Specifically, by switching different filters, light of a specific wavelength range emitted from multiple microreaction units in the DPCR instrument's microfluidic chip enters the instrument's imaging module. The imaging module obtains a complete image of the microfluidic chip based on this specific wavelength range of light to determine the positive ratio of the multiple microreaction units.

[0003] To facilitate easy switching between different filters while ensuring complete imaging of the microfluidic chip, the size of each filter needs to take into account the size of the light spot on the plane of the filter. If the size of the light spot is larger than the size of the filter, some light will be blocked and unable to pass through the filter. As a result, the image of the microfluidic chip acquired by the imaging module will be too dark or incomplete, ultimately affecting the detection accuracy and sensitivity of the DPCR instrument.

[0004] However, in related technologies, in order to ensure the detection accuracy of DPCR instruments, filter devices that include multiple filters on the same plane often occupy a large space in DPCR instruments, making it difficult to meet the market's requirements for miniaturization of DPCR instruments. Utility Model Content

[0005] To address the aforementioned issues, this application provides a filtering device that aims to solve the problem of excessive space occupation by filtering devices in related technologies.

[0006] To achieve the above objectives:

[0007] Embodiments of this application provide a light filtering device, comprising:

[0008] At least two filter modules are coaxially arranged, wherein each filter module has a light-transmitting hole, and the light-transmitting holes of any two filter modules are coaxially arranged in a first direction, which is parallel to the axial direction of the filter module.

[0009] A driving module is used to drive the filter element of the filter module to move relative to the light-transmitting hole, so that the light incident on the filter device passes through the light-transmitting hole of each filter module and the filter element of each filter module in sequence before exiting.

[0010] In one embodiment, the filter module further includes a carrier, the filter is disposed on the carrier, and the carrier and the filter are coaxially arranged, with the light-transmitting hole formed on the carrier; wherein...

[0011] When the driving module comes into contact with one of the filter modules, the driving module drives the carrier to rotate along the axial direction of the carrier, or the driving module drives the filter to rotate along the axial direction of the filter.

[0012] In one embodiment, the filter element includes a filter holder, a bearing, and a filter.

[0013] The bearing is mounted on the support member and is connected to the filter bracket. The filter bracket, the bearing, and the support member are coaxially arranged.

[0014] The filter holder has multiple filter holes, which are spaced apart circumferentially along the filter holder, and at least one filter hole is fitted with a filter; wherein...

[0015] In any of the filter modules, the first distance and the second distance are the same. The first distance is the distance between the axis of any filter hole and the axis of the filter support, and the second distance is the distance between the axis of the light-transmitting hole and the axis of the carrier.

[0016] In one embodiment, when the axis of one of the filter holes is coaxial with the axis of the light-transmitting hole, the orthographic projection pattern of the light-transmitting hole on the filter element along the axial direction of the filter hole is located within the one of the filter holes.

[0017] In one embodiment, in the same filter element, m-1 filters are arranged in a one-to-one correspondence with m-1 of the m filter holes, where m is an integer greater than or equal to 2.

[0018] In one embodiment, when the filter aperture of one of the filter elements with the filter is in the working position, the filter apertures of the other filter elements of the at least two filter modules without the filter are in the working position, wherein the working position is the position of the filter aperture when the axis of the filter aperture is coaxial with the axis of the light-transmitting hole.

[0019] In one embodiment, at least two of the filters filter light with different wavelength ranges.

[0020] In one embodiment, in any two of the filters, the wavelength range of light filtered by any filter of one filter is different from the wavelength range of light filtered by any filter of the other filter.

[0021] In one embodiment, in the same filter module, the side of the carrier near the filter bracket has an annular first protrusion, and the side of the filter bracket near the carrier has an annular second protrusion surrounding the outer wall of the bearing, and the second protrusion is received within the first protrusion.

[0022] In one embodiment, the side of the carrier near the filter bracket is further provided with a third protrusion surrounding the light-transmitting hole, and the thickness of the third protrusion in the first direction is the same as the thickness of the first protrusion in the first direction.

[0023] In one embodiment, the filter module further includes a detection element for detecting the rotation angle of the filter support.

[0024] In one embodiment, each of the carrier members has a first groove adapted to the detection member and a second groove adapted to the detection member;

[0025] In each of the filter modules, the first groove is located on the side of the carrier closer to the filter, and the second groove is located on the side of the carrier away from the filter;

[0026] In any two adjacent filter modules, the first groove of the first filter module and the second groove of the second filter module enclose a receiving space, and the detection element of the first filter module is disposed in the receiving space. The first filter module is any filter module, and the second filter module is the filter module located above the first filter module along the first direction.

[0027] In one embodiment, the driving module includes a driving member and a rotating member connected to the driving member. The driving member is used to drive the rotating member to move along the first direction and to drive the rotating member to rotate along the axial direction of the driving member. When the rotating member contacts the filter module, the rotating member is used to drive the filter module in contact to rotate.

[0028] Alternatively, the driving module includes a number of driving members matching the at least two filter modules and a rotating member connected to each of the driving members. Each rotating member is in contact with the corresponding filter module. The rotating member is used to drive the filter module in contact to rotate, and the driving member is used to drive the rotating member to rotate along the axial direction of the driving member.

[0029] The filtering device provided in this application has a light-transmitting hole in each of at least two coaxially arranged filtering modules, and the light-transmitting holes of any two filtering modules are coaxially arranged in a direction parallel to the axial direction of the filtering modules. A driving module drives the filter elements of the filtering modules to move, so that the light incident on the filtering device passes through the light-transmitting holes and filter elements of each filtering module in sequence before exiting. Since the filter elements allow light of a specific wavelength range to pass through, the light finally exiting the filtering device is light of a specific wavelength range. In this application, based on at least two coaxially arranged filtering modules, at least two filter elements are stacked in three-dimensional space, thereby reducing the space occupied by the filtering device and facilitating the miniaturization of the filtering device. Attached Figure Description

[0030] Figure 1 A three-dimensional structural diagram of at least two filter modules of a filter device provided in an embodiment of this application from a viewpoint;

[0031] Figure 2 for Figure 1 The filter device shown is a cross-sectional view along the A-A' direction;

[0032] Figure 3 for Figure 1 A three-dimensional structural schematic diagram of at least two filter modules of the filter device shown from another perspective;

[0033] Figure 4 for Figure 2 The filter device shown is a cross-sectional view along the B-B' direction;

[0034] Figure 5 for Figure 1 A three-dimensional structural schematic diagram of the load-bearing component is shown;

[0035] Figure 6 for Figure 3 A three-dimensional structural schematic diagram of the load-bearing component is shown;

[0036] Figure 7 A three-dimensional structural schematic diagram of a filtering device provided in another embodiment of this application from a viewing angle;

[0037] Figure 8 for Figure 7 A three-dimensional structural schematic diagram of the filter device shown from another perspective;

[0038] Figure 9 for Figure 7 An exploded view of the filter device is shown.

[0039] Figure 10 for Figure 7 The diagram shows a three-dimensional structure of the drive module.

[0040] Figure 11 for Figure 1 A schematic diagram of the three-dimensional structure of the filter element is shown;

[0041] Figure 12 for Figure 3 The diagram shows a three-dimensional structure of the filter. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0043] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the order of the steps or actions in the method description can be changed or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0044] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The term "connection" in this application, unless otherwise specified, includes both direct and indirect connections.

[0045] In one embodiment provided in this application, such as Figures 1 to 4 As shown, the filter device 100 includes:

[0046] At least two filter modules 10 are coaxially arranged, each filter module 10 has a light-transmitting hole 11, and the light-transmitting holes 11 of any two filter modules 10 are coaxially arranged in a first direction d1, the first direction d1 being parallel to the axial direction d2 of the filter module 10.

[0047] For example, in one embodiment, the light filtering device 100 further includes a rotating rod 30, which passes through the axis of each light filtering module 10 of the light filtering device 100 in sequence, so that each light filtering module 10 can rotate relative to the rotating rod 30. In this way, by coaxially arranging the light transmission holes 11 of any two light filtering modules 10 in the first direction d1, the light incident on the light filtering device 100 passes through the light transmission holes 11 of the first light filtering module 10, the light transmission holes 11 of the second light filtering module 10, and finally passes through the light transmission holes 11 of the last light filtering module 10 and exits to the outside of the light filtering device 100.

[0048] The filter device 100 also includes a drive module 20. Figures 1 to 4 (Not shown in the image), the driving module 20 is used to drive the filter element 14 of the filter module 10 to move relative to the light transmission hole 11, so that the light incident on the filter device 100 passes through the light transmission hole 11 of each filter module 10 and the filter element 14 of each filter module 10 in sequence before exiting.

[0049] Specifically, the driving module 20 drives the filter element 14 to move relative to the light-transmitting hole 11, so that the light incident on the filtering device 100 passes through the light-transmitting hole 11 of the first filtering module 10, the filter element 14 of the first filtering module 10, the light-transmitting hole 11 of the second filtering module 10, and the filter element 14 of the second filtering module 10, until it passes through the light-transmitting hole 11 of the last filtering module 10 and the filter element 14 of the last filtering module 10 and exits to the outside of the filtering device 100.

[0050] Compared to the filtering device 100 of related technologies, which arranges multiple filter elements 14 in a single layer on the same plane, the filtering device 100 provided in this embodiment is based on at least two filter modules 10 arranged coaxially, so that at least two filter elements 14 are stacked in three-dimensional space along the first direction d1, thereby reducing the space occupied by the filtering device 100, and thus reducing the overall size of the filtering device 100, which is beneficial to achieving the miniaturization of the filtering device 100.

[0051] Further, please refer to Figures 1 to 6 As shown, in one embodiment, the filter module 10 further includes a carrier 12.

[0052] The light-transmitting hole 11 is formed on the carrier 12, and the filter element 14 is disposed on the carrier 12. Furthermore, the carrier 12 and the filter element 14 are coaxially arranged. In this way, in a filter module 10, the carrier 12 can rotate relative to the filter element 14, so that different areas of the filter element 14 correspond to the light-transmitting hole 11.

[0053] It is worth mentioning that the coaxial arrangement of the carrier 12 and the filter 14 means that the axial direction d2 of the carrier 12 coincides with the axial direction d2 of the filter 14.

[0054] When the drive module 20 comes into contact with one of the at least two filter modules 10, the drive module 20 drives the filter element 14 to rotate along the axial direction d2 of the filter element 14. This allows the carrier member 12 in the filter module 10 that is in contact with the drive module 20 to rotate relative to the filter element 14, so that different areas of the filter element 14 correspond to the light transmission holes 11.

[0055] It is worth mentioning that, in another embodiment, the drive module 20 can also drive the carrier 12 to rotate along the axial direction d2 of the carrier 12. In this way, the carrier 12 in the filter module 10 that is in contact with the drive module 20 can also rotate relative to the filter 14.

[0056] Specifically, in one embodiment, the drive module 20 includes a number of drive members 21 that match at least two filter modules 10 and a rotating member 22 connected to each drive member 21, with each rotating member 22 in contact with a corresponding filter module 10.

[0057] The rotating component 22 is used to drive the filter module 10 in contact to rotate. The driving component 21 is used to drive the rotating component 22 to rotate along the axial direction d2 of the driving component 21.

[0058] For example, such as Figures 7 to 9 As shown, taking the filter device 100 as an example, which includes two filter modules 10 (first filter module 10a and second filter module 10b), the drive module 20 includes two drive members 21 and two rotating members 22.

[0059] Among them, the two driving components 21 are the first driving component 21a and the second driving component 21b, and the two rotating components 22 are the first rotating component 22a and the second rotating component 22b, respectively. The first driving component 21a is connected to the first rotating component 22a, and the second driving component 21b is connected to the second rotating component 22b.

[0060] The first rotating member 22a is in contact with the first filter module 10a. The first rotating member 22a drives the first filter module 10a to rotate, and the first driving member 21a drives the first rotating member 22a to rotate along the axial direction of the first driving member 21a.

[0061] The second rotating member 22b is in contact with the second filter module 10b, and the second rotating member 22b drives the second filter module 10b to rotate. The second driving member 21b drives the second rotating member 22b to rotate along the axial direction of the second driving member 21b.

[0062] In the driving module 20 provided in this embodiment, by providing a driving component 21 and a rotating component 22 for each filter module 10, each driving component 21 controls only one filter module 10 to rotate, and each driving component 21 controls only one rotating component 22 to rotate. In this way, each filter module 10 can rotate simultaneously, saving the time required to rotate all filter modules 10 in a time-sharing manner.

[0063] In another embodiment, the drive module 20 may also include only a drive member 21 and a rotating member 22 connected to the drive member 21.

[0064] The driving component 21 is used to drive the rotating component 22 to move along the first direction d1 and to drive the rotating component 22 to rotate along the axial direction of the driving component 21. When the rotating component 22 is in contact with a filter module 10, the rotating component 22 is used to drive the filter module 10 in contact to rotate.

[0065] For example, taking the filter device 100 as including two filter modules 10 (a first filter module 10a and a second filter module 10b), the rotating member 22 moves along the first direction d1 under the drive of the driving member 21, thereby contacting the first filter module 10a to drive the first filter module 10a to rotate. Subsequently, the rotating member 22 continues to move along the first direction d1 under the drive of the driving member 21, thereby contacting the second filter module 10b to drive the second filter module 10b to rotate.

[0066] In the driving module 20 provided in this embodiment, by setting a driving component 21 and a rotating component 22, the rotating component 22 can control the rotation of multiple filter modules 10 in a time-sharing manner. In this way, only one driving component 21 is needed to drive the rotating component 22, saving the space occupied by the filter device 100 for setting multiple driving components 21 and multiple rotating components 22.

[0067] Specifically, such as Figures 1 to 4 , Figures 7 to 9 ,as well as Figures 11 to 12 As shown, in one embodiment, the filter element 14 includes a filter support 141, a bearing 142, and a filter 143.

[0068] The bearing 142 is mounted on the support member 12 and is connected to the filter bracket 141. Furthermore, the filter bracket 141, the bearing 142, and the support member 12 are coaxially arranged, that is, the axial direction of the filter bracket 141, the axial direction of the bearing 142, and the axial direction of the support member 12 coincide.

[0069] The filter holder 141 has multiple filter holes 13, which are spaced apart circumferentially along the filter holder 141. It is worth mentioning that the multiple filter holes 13 can be equally spaced along the circumferential direction of the filter holder 141, or they can be non-equally spaced along the circumferential direction of the filter holder 141.

[0070] In this embodiment, at least one filter aperture 13 of the filter holder 141 is provided with a filter 143. That is, in one specific embodiment, some filter apertures 13 of the filter holder 141 are provided with filters 143, while other filter apertures 13 of the filter holder 141 are not provided with filters 143. In another specific embodiment, all filter apertures 13 of the filter holder 141 are provided with filters 143.

[0071] In any filter module 10, such as Figure 4 As shown, the first distance L1 and the second distance L2 are the same. The first distance L1 is the distance between the axis o2 of any filter hole 13 and the axis o3 of the filter bracket 141, and the second distance L2 is the distance between the axis o1 of the light-transmitting hole 11 and the axis o4 of the carrier 12.

[0072] Since the first distance L1 and the second distance L2 are the same, when the filter bracket 141 rotates relative to the support member 12 along the axial direction d2, the movement trajectory of the filter hole 13 coincides with the movement trajectory of the light transmission hole 11 on the axial direction d2 of the filter bracket 141. In this way, it is ensured that all filter holes 13 can at least partially coincide with the light transmission hole 11 on the first direction d1, so that when light passes through the filter module 10, the light passes through the light transmission hole 11 first and then through the filter hole 13.

[0073] Furthermore, in one embodiment, please continue to refer to... Figure 4 When the axis o2 of a filter hole 13 is coaxial with the axis o1 of a light-transmitting hole 11, that is, when the line connecting the axis o2 of a filter hole 13 and the axis o1 of a light-transmitting hole 11 is located in the first direction d1, the orthogonal projection pattern of the light-transmitting hole 11 along the axial direction d2 of the filter hole 13 on the carrier 12 is located within the filter hole 13.

[0074] In this embodiment, when a filter aperture 13 moves to the point where its axis o2 coincides with the axis o1 of the light transmission aperture 11 in the first direction d1, the orthographic projection pattern of the light transmission aperture 11 on the support member 12 along the first direction d1 coincides with or is smaller than the filter aperture 13. In this way, the light emitted from the light transmission aperture 11 can be incident on the filter aperture 13 to the maximum extent, reducing light loss.

[0075] In another embodiment, for the same filter element 14, m-1 filters 143 are configured in a one-to-one correspondence with m-1 filter holes 13 among the m filter holes 13. m is an integer greater than or equal to 2.

[0076] For example, such as Figures 1 to 4 , Figures 7 to 9 ,as well as Figures 11 to 12 As shown, taking a filter element 14 with 5 filter holes 13 as an example, 4 filters 143 are arranged one-to-one with 4 of the 5 filter holes 13, so that there is one filter hole 13 without a filter 143. The purpose of this arrangement is to allow light incident on the filter device 100 to be selectively not filtered by any filter element 14's filter 143 or only filtered by one or more filter elements 14's filter 143 as it passes through each filter module 10 in sequence.

[0077] It is worth mentioning that a lens without a filtering function, such as a transparent glass lens, can be installed in the filter hole 13 without a filter 143 to prevent dust from entering the filter module 10 through the filter hole 13 without a filter 143 after long-term use.

[0078] For further information, please refer to [link / reference]. Figure 2 , Figure 4 as well as Figure 9 When the filter hole 13 of a filter element 14 with a filter 143 is in the working position w1, the filter holes 13 of at least two other filter elements 14 of the filter modules 10 without filters 143 are also in the working position w1. The working position w1 is the position of the filter hole 13 when the axis of the filter hole 13 is coaxial with the axis of the light-transmitting hole 11.

[0079] For example, taking a light filtering device 100 that includes two light filtering modules 10 (a first light filtering module 10a and a second light filtering module 10b) as an example, when the filter hole 13 of the filter element 14 of the first light filtering module 10a with a filter 143 is rotated to the working position w1, the filter hole 13 of the filter element 14 of the second light filtering module 10b without a filter 143 is rotated to the working position w1. Thus, the light incident on the light filtering device 100 passes through the light transmission hole 11 of the first light filtering module 10a, the filter hole 13 of the first light filtering module 10a with a filter 143, the light transmission hole 11 of the second light filtering module 10b, and the filter hole 13 of the second light filtering module 10b without a filter 143, and then exits to the outside of the light filtering device 100.

[0080] In other words, as the light incident on the filter device 100 passes through the light-transmitting holes 11 and the filter holes 13 of all the filter elements 14 in sequence, it will only pass through one filter hole 13 with a filter 143, ensuring that light of a specific wavelength range is emitted from the filter device 100.

[0081] Furthermore, in one embodiment, for the same filter module 10, such as Figure 4 , Figure 5 as well as Figure 12 As shown, a first annular protrusion 122 is formed on the side of the carrier 12 near the filter bracket 141, and a second annular protrusion 144 is formed around the outer wall of the bearing 142 on the side of the filter bracket 141 near the carrier 12, and the second protrusion 144 is received within the first protrusion 122.

[0082] In this embodiment, by housing the second protrusion 144 of the filter element 14 within the first protrusion 122 of the carrier element 12, the assembly gap between the carrier element 12 and the filter element 14 in the same filter module 10 is reduced, thereby improving the compactness of the filter module 10. This prevents light incident on the filter module 10 from leaking out from the assembly gap between the carrier element 12 and the filter element 14, and reduces the light loss rate of light passing through the filter module 10.

[0083] Furthermore, in one embodiment, please continue to refer to... Figure 4 as well as Figure 5 The side of the support member 12 near the filter bracket 141 also has a third protrusion 124 surrounding the light-transmitting hole 11. The thickness of the third protrusion 124 in the first direction d1 is the same as the thickness of the first protrusion 122 in the first direction d1.

[0084] In this embodiment, the third protrusion 124 can further reduce light leakage when light passes through the light-transmitting hole 11, ensuring that the light passing through the light-transmitting hole 11 is incident on the filter 14 as much as possible, and reducing the light loss rate when passing through the filter module 10.

[0085] In this embodiment, since the thickness of the third protrusion 124 in the first direction d1 is the same as the thickness of the first protrusion 122 in the first direction d1, when the filter element 14 is disposed on the carrier 12, both the third protrusion 124 and the first protrusion 122 remain in contact with the surface of the filter element 14, thereby ensuring the rotational smoothness of the filter element 14 during the rotation process relative to the carrier 12 along the axial direction d2.

[0086] Furthermore, in one embodiment, for the same filter element 14, at least two filters 143 filter out different wavelength ranges of light. In this way, when the driving module 20 drives the filter element 14 to move, the filter element 14 rotates relative to the carrier 12, and the wavelength range of light passing through the filter element 14 changes accordingly.

[0087] Furthermore, in one embodiment, for any two filters 14, the wavelength range of light filtered by any filter 143 of one filter 14 is different from the wavelength range of light filtered by any filter 143 of the other filter 14. In this way, when the driving module 20 drives different filters 14 to move, the driven filter 14 rotates relative to the carrier 12, and the wavelength range of light passing through the filter 14 changes accordingly.

[0088] It is worth mentioning that, such as Figure 1 , Figure 7 as well as Figure 9 As shown, the filter module 10 also includes a detection element 15, which is used to detect the rotation angle of the filter bracket 141.

[0089] For example, the detection element 15 is a lidar, which is mounted on the support element 12 and clamps the filter element 14 to detect the rotation angle of the filter element 14 along the axial direction d2. By determining the rotation angle of the filter element 14 around the axial direction d2, it is determined whether the light-transmitting hole 11 corresponds to a certain filter hole 13 of the filter 143 along the first direction d1.

[0090] Furthermore, in one embodiment, as Figure 3 , Figure 4 , Figure 6 as well as Figure 9 As shown, each carrier 12 has a first groove 121 adapted to the detection component 15 and a second groove 123 adapted to the detection component 15.

[0091] In each filter module 10, the first groove 121 is located on the side of the carrier 12 close to the filter 14, and the second groove 123 is located on the side of the carrier 12 away from the filter 14.

[0092] Among them, in any two adjacent filter modules 10, combined Figures 7 to 9 As shown, the first groove 121 of the first filter module 10a and the second groove 123 of the second filter module 10b enclose a receiving space. The detection element 15 of the first filter module 10a is disposed in the receiving space.

[0093] Wherein, the first filter module 10a is any filter module 10, and the second filter module 10b is a filter module 10 located above the first filter module 10a along the first direction d1.

[0094] In this embodiment, by providing a first groove 121 and a second groove 123 on the carrier 12, when multiple carriers 12 are coaxially arranged, the receiving space formed by the first groove 121 on one carrier 12 and the second groove 123 on the adjacent carrier 12 of the detection element 15 is cooperated with is saved due to the additional space required by adding the detection element 15 in the filter device 100, thus ensuring the compactness and miniaturization of the filter device 100.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application specification.

[0096] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A light filtering device, characterized in that The application relates to a filter device. The filter device comprises at least two filter modules coaxially arranged, wherein a light passing hole is arranged on the filter module, and the light passing holes of any two filter modules are coaxially arranged in a first direction, and the first direction is parallel to the axial direction of the filter module. A driving module is arranged for driving the filter piece of the filter module to move relative to the light passing hole, so that the light incident on the filter device passes through the light passing hole of each filter module and the filter piece of each filter module in turn and is emitted again.

2. The light filtering device of claim 1, wherein, The filter module further comprises a bearing piece, the filter piece is arranged on the bearing piece, the bearing piece and the filter piece are coaxially arranged, and the light passing hole is arranged on the bearing piece. When the driving module is in contact with the filter module, the driving module drives the bearing piece to rotate along the axial direction of the bearing piece, or the driving module drives the filter piece to rotate along the axial direction of the filter piece.

3. The light filtering device of claim 2, wherein, The filter piece comprises a filter support, a bearing and a filter sheet. The bearing is arranged on the bearing piece and connected with the filter support, and the filter support, the bearing and the bearing piece are coaxially arranged. The filter support is provided with a plurality of filter holes, the filter holes are arranged at intervals along the circumferential direction of the filter support, at least one filter hole is provided with the filter sheet, and the filter support is provided with a plurality of filter holes. In any filter module, the first distance and the second distance are the same, the first distance is the distance between the axis of any filter hole and the axis of the filter support, and the second distance is the distance between the axis of the light passing hole and the axis of the bearing piece.

4. The light filtering device of claim 3, wherein, When the axis of the filter hole is coaxial with the axis of the light passing hole, the orthographic projection pattern of the light passing hole on the filter piece along the axial direction of the filter hole is located in the filter hole.

5. The light filtering device of claim 3, wherein, In the same filter piece, m-1 filter sheets are arranged in one-to-one correspondence with m-1 filter holes in the m filter holes, wherein m is an integer greater than or equal to 2.

6. The light filtering device of claim 5, wherein, When the filter hole provided with the filter sheet of the filter piece is in the working position, the filter hole without the filter sheet of the other filter piece of the at least two filter modules is in the working position, wherein the working position is the position of the filter hole when the axis of the filter hole is coaxial with the axis of the light passing hole.

7. The light filtering device of claim 5, wherein, The wavelength ranges of the light filtered by the at least two filter sheets are different.

8. The filter device according to claim 5 or 7, characterized in that In any two filter pieces, the wavelength range of the light filtered by any filter sheet of one filter piece is different from the wavelength range of the light filtered by any filter sheet of the other filter piece.

9. The light filtering device of claim 3, wherein, In the same filter module, a first annular protrusion is formed on the side of the bearing piece close to the filter support, a second annular protrusion is formed on the side of the filter support close to the bearing piece and surrounds the outer wall of the bearing, and the second protrusion is accommodated in the first protrusion.

10. The light filtering device of claim 9, wherein, The side of the bearing piece close to the filter support is further provided with a third protrusion surrounding the light passing hole, and the thickness of the third protrusion in the first direction is the same as the thickness of the first protrusion in the first direction.

11. The light filtering device of claim 9, wherein, The filter module further comprises a detection member configured to detect the rotation angle of the filter support.

12. The light filtering device of claim 11, wherein, Each of the carriers is provided with a first recess and a second recess which are adapted to the detection member; In each of the filter modules, the first recess is located on the side of the carrier close to the filter member, and the second recess is located on the side of the carrier away from the filter member; In any two adjacent filter modules, the first recess of a first filter module and the second recess of a second filter module form a receiving space, and the detection member of the first filter module is arranged in the receiving space, wherein the first filter module is any of the filter modules, and the second filter module is the filter module located above the first filter module along the first direction.

13. The filter device according to claim 1, wherein The driving module comprises a driving member and a rotating member connected with the driving member, the driving member is configured to drive the rotating member to move along the first direction and to drive the rotating member to rotate along the axial direction of the driving member, and the rotating member is configured to drive the filter module in contact with the rotating member to rotate when the rotating member is in contact with the filter module. Alternatively, the driving module comprises a number of driving members matched with the number of the filter modules, and a rotating member connected with each of the driving members, each of the rotating members is in contact with the corresponding filter module, the rotating member is configured to drive the filter module in contact with the rotating member to rotate, and the driving member is configured to drive the rotating member to rotate along the axial direction of the driving member.

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