A filter tool and filter wheel structure capable of adjusting filter angle

Abstract

The application discloses a filter tool with adjustable filter angle and a filter wheel structure, which is used for adjusting filters to be parallel to each other and reducing measurement error. The filter tool is fixed on a rotating disc of a matching imaging device and comprises a tool main body, a pressing ring and an adjusting part. A containing groove is arranged on the tool main body, a through hole is arranged on the groove bottom of the containing groove, and the containing groove is used for placing filters. The pressing ring is located in the containing groove and is connected with the tool main body, and the pressing ring is used for fixing the filters in the containing groove. At least three adjusting feet are arranged on the outer periphery of the tool main body, one adjusting part is arranged in each adjusting foot, the adjusting part is used for being connected with the rotating disc and adjusting the distance between the adjusting feet and the rotating disc.

Description

Technical Field

[0001] This application relates to the field of imaging equipment technology, and in particular to a filter tooling and filter wheel structure with adjustable filter angle. Background Technology

[0002] In fields such as optical measurement, machine vision, and spectral analysis, the filter wheel is a core optical component used to quickly switch between optical filters of different wavelengths, thereby achieving selective transmission of light of specific wavelengths. Currently, the mainstream filter wheels on the market mainly consist of a rotatable metal disk with multiple light-transmitting holes machined into the disk at preset positions. Each light-transmitting hole is used to install a filter, which is pressed onto the disk by an independent pressure ring or cover plate during installation.

[0003] However, since the optical discs themselves are machined, there are manufacturing errors. Furthermore, errors also exist in the process of installing the filters onto the discs, resulting in the filters potentially being non-parallel after installation. When light passes through these non-parallel filters at a certain angle, unexpected and inconsistent light path shifts occur due to the refraction effect of the filter glass substrate. This leads to changes in the imaging position on imaging devices such as CMOS image sensors when using different filters, causing measurement errors. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a filter fixture and filter wheel structure with adjustable filter angles, which can adjust the parallelism between the filters and reduce measurement errors.

[0005] The technical solution provided in this application is described below: The first aspect of this application provides a filter fixture with an adjustable filter angle for fixing on a rotating disk plate that cooperates with an imaging device, comprising: Tooling body, pressure ring, and adjusting components; The tooling body is provided with a receiving groove, and the bottom of the receiving groove is provided with a through hole. The receiving groove is used to place a filter. The pressure ring is located in the receiving groove and connected to the tooling body. The pressure ring is used to fix the filter in the receiving groove. The tooling body has at least three adjusting feet on its outer periphery, and each adjusting foot has one adjusting component. The adjusting component is used to connect with the rotary disc and adjust the distance between the adjusting foot and the rotary disc.

[0006] Optionally, the outer side of the pressure ring is provided with an external thread, and the inner sidewall of the receiving groove is provided with an internal thread. The external thread and the internal thread cooperate to connect the pressure ring in the receiving groove.

[0007] Optionally, the pressure ring has a bayonet on the side facing away from the filter.

[0008] Optionally, a soft gasket is provided on the side of the pressure ring facing the through hole, and the soft gasket is used to abut against the filter.

[0009] Optionally, the number of adjusting feet is at least three, and they are evenly distributed on the outer periphery of the tooling body.

[0010] Optionally, the adjusting element includes a screw and a spring; The adjusting foot is provided with a spring groove and a screw hole. The spring is set in the spring groove and is used to abut against the wheel disc. The screw is screwed in from the screw hole, passes through the spring and is used to connect with the wheel disc.

[0011] Optionally, the pressure ring has a slot on the side facing the through hole, and the inner diameter of the slot matches the outer diameter of the filter.

[0012] The second aspect of this application provides a filter wheel structure, including a rotating disk, a filter, and a plurality of filter fixtures as described in the first aspect and any optional embodiment of the first aspect; the rotating disk is provided with a plurality of light-transmitting holes, and the filter fixture is aligned with the light-transmitting holes and connected to the rotating disk; The filter is fixed inside the filter fixture, which is used to adjust the tilt angle between the filter and the rotary disc.

[0013] Optionally, a dispensing groove is provided on the light-transmitting hole, which is used to fix the filter fixture in conjunction with adhesive.

[0014] Optionally, the rotary disc is provided with a connecting groove, which is aligned with the adjusting foot on the filter fixture and connected to the filter fixture through an adjusting member provided in the adjusting foot.

[0015] As can be seen from the above technical solutions, this application has the following beneficial effects: This application provides a receiving groove on the main body of the fixture, with a through hole at the bottom of the groove. A filter is fixed in the receiving groove using a pressure ring. At least three adjusting feet are provided on the outer periphery of the main body of the fixture, each foot containing an adjusting element. The adjusting feet are connected to the rotating disk of the imaging device via the adjusting elements, and the adjusting elements are used to adjust the distance between the adjusting feet and the rotating disk. Thus, by adjusting the distance between the adjusting feet and the rotating disk, the angle between the main body of the fixture and the rotating disk can be adjusted, thereby achieving angle adjustment between the filter and the rotating disk. This ensures that each filter on the rotating disk is parallel to the rotating disk, reducing measurement errors. Attached Figure Description

[0016] Figure 1 A schematic diagram of a filter fixture with an adjustable filter angle; Figure 2 Another schematic diagram of a filter fixture with an adjustable filter angle; Figure 3 This is a schematic diagram of a slot in a filter fixture with an adjustable filter angle. Figure 4 This is a schematic diagram of the screw and spring engagement in a filter fixture with an adjustable filter angle. Figure 5 This is a schematic diagram of a filter wheel structure; Figure 6 An exploded view of a filter wheel structure; Figure 7 This is a partial schematic diagram of a filter wheel structure; In the figure, the fixture body is 01, the pressure ring is 02, the filter is 03, the adjusting foot is 04, the bayonet is 05, the spring is 06, the screw is 07, the spring groove is 08, the slot is 09, the wheel disc is 10, the glue dispensing groove is 11, and the connecting groove is 12. Detailed Implementation

[0017] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.

[0018] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0019] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0021] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] To address the problem of imaging position shift caused by errors in the manufacturing and installation processes, this application proposes a filter fixture and filter wheel structure with adjustable filter angles. This structure allows for the adjustment of the parallelism between filters, ensuring that each imaging position is in the same location and reducing measurement errors. The specific implementation structure of this application is described below: See Figures 1 to 7 This application first provides an embodiment of a filter fixture with an adjustable filter angle, the embodiment including: The fixture body 01, the pressure ring 02, and the adjusting component are provided. The fixture body 01 is provided with a receiving groove, and the bottom of the receiving groove is provided with a through hole. The receiving groove is used to place the filter 03. The pressure ring 02 is located in the receiving groove and connected to the fixture body 01. The pressure ring 02 is used to fix the filter 03 in the receiving groove. At least three adjusting feet 04 are provided on the outer periphery of the fixture body 01. Each adjusting foot 04 is provided with one adjusting component. The adjusting component is used to connect with the rotary disc 10 and adjust the distance between the adjusting foot 04 and the rotary disc 10.

[0023] The tooling body 01 is cylindrical, and the receiving groove extends from one side of the tooling body 01 to the other side. A through hole is provided at the center of the bottom of the groove, and the diameter of the through hole is smaller than the inner diameter of the receiving groove.

[0024] The receiving groove is used to hold the filter 03. One side of the filter 03 abuts against the bottom of the groove, while the other side is pressed and fixed by the pressure ring 02. Specifically, the pressure ring 02 is located in the receiving groove and is tightly connected to the fixture body 01 to ensure that the filter 03 is in a stable position and to prevent abnormal light transmission caused by the filter 03 shaking or moving. Through its connection with the fixture body 01, the pressure ring 02 applies appropriate pressure to the filter 03 to ensure that the filter 03 does not shift in the receiving groove, thereby ensuring the stability and accuracy of imaging.

[0025] The tooling body 01 has at least three adjusting feet 04 on its outer periphery. These feet, distributed at different positions on the outer periphery, allow for angle adjustment of the tooling body 01 from multiple directions. Each adjusting foot 04 contains an adjusting element for connection to the rotary disc 10. The adjusting element is fixed to the rotary disc 10 using specific connection methods, such as threaded connection or snap-fit ​​connection. The adjusting element adjusts the distance between the adjusting foot 04 and the rotary disc 10. When the adjusting element changes the distance between the adjusting foot 04 and the rotary disc 10, the tooling body 01 deflects as a whole, causing the filter 03 installed in the receiving groove to deflect as well, thereby adjusting the angle between the filter 03 and the rotary disc 10.

[0026] The filter fixture of this application is fixed on the rotating disk 10 of the imaging device, and the number of filter fixtures is the same as the number of filters 03 set in the imaging device. The rotating disk 10 is provided with multiple light-transmitting holes, and the fixture body 01 of the filter fixture is installed on these light-transmitting holes. The through hole (the through hole set on the bottom of the groove) provided on each fixture body 01 is aligned with the light-transmitting hole.

[0027] In this embodiment, the filter 03 is first placed in the receiving groove of the fixture body 01, and then the filter 03 is fixed using the pressure ring 02. Next, the entire filter fixture is installed onto the rotating disk 10 of the imaging device, and connected to the rotating disk 10 via an adjusting member. When it is found that the filter 03 is not installed parallel, causing a deviation in the imaging position, the distance between the adjusting foot 04 and the rotating disk 10 can be changed by operating the adjusting member, thereby adjusting the angle between the fixture body 01 and the rotating disk 10, so that the filter 03 is parallel (each filter 03 is parallel to each other). In this way, when light passes through the parallel filters 03 at a certain angle, there will be no unexpected and inconsistent optical path deviation due to the refraction effect of the glass substrate of the filter 03, thus ensuring the stability of the imaging position on imaging devices such as CMOS image sensors when different filters 03 are used, and reducing measurement errors.

[0028] In an optional embodiment, the outer side of the pressure ring 02 is provided with an external thread, and the inner sidewall of the receiving groove is provided with an internal thread. The external thread and the internal thread cooperate to connect the pressure ring 02 in the receiving groove.

[0029] In the specific connection between the pressure ring 02 and the tooling body 01, this embodiment adopts a threaded connection. Specifically, an external thread is provided on the outside of the pressure ring 02, and an internal thread is provided on the inner wall of the receiving groove. The internal thread matches the external thread. After the filter 03 is placed into the receiving groove, the pressure ring 02 is screwed into the receiving groove until the filter 03 is squeezed and fixed.

[0030] Please continue reading. Figure 2 To facilitate screwing the pressure ring 02 into the receiving groove, in this optional embodiment, a retaining 05 is provided on the side of the pressure ring 02 facing away from the filter 03. There is at least one pair of retaining 05s, and each pair is symmetrically arranged on the side of the pressure ring 02 facing away from the filter 03. The retaining 05s are recessed from one side of the pressure ring 02 facing away from the filter 03 to the other side. In actual use, an external tool (such as a metal sheet) is inserted into the retaining 05 of the pressure ring 02, and the pressure ring 02 is screwed in and out by rotating the external tool.

[0031] In an optional embodiment, a soft gasket is provided on the side of the pressure ring 02 facing the through hole, the soft gasket being used to abut against the filter 03.

[0032] In this embodiment, the soft pad is located on the side of the pressure ring 02 facing the filter 03, and the soft pad is connected to the pressure ring 02 by adhesive. The soft pad can be made of materials such as rubber or silicone. By setting the soft pad to abut against the filter 03, the wear of the pressure ring 02 on the filter 03 can be reduced.

[0033] In an optional embodiment, the number of adjusting feet 04 is at least three, and they are evenly distributed around the outer periphery of the tooling body 01.

[0034] The adjusting feet 04 and the main body of the tooling 01 are integrally formed, such as by casting or welding. In this embodiment, the evenly spaced distribution ensures the accuracy of the angle adjustment of the filter 03 and avoids deformation of the main body of the tooling 01 due to localized stress concentration.

[0035] Please continue reading. Figure 4 and Figure 6 In an optional embodiment, the adjusting element includes a screw 07 and a spring 06; the adjusting foot 04 is provided with a spring groove 08 and a screw hole, the spring 06 is disposed in the spring groove 08 and is used to abut against the rotating disc 10, and the screw 07 is screwed in from the screw hole, passes through the spring 06 and is used to connect with the rotating disc 10.

[0036] The spring groove 08 is located on the side of the adjusting foot 04 facing the wheel disc 10. The screw hole passes through the adjusting foot 04 and is located at the center of the spring groove 08. The inner diameter of the spring 06 is larger than the outer diameter of the screw 07, so that the screw 07 can pass through the spring 06 and connect to the wheel disc 10.

[0037] In this embodiment, the spring 06 is located between the adjusting foot 04 and the rotating disc 10. One end of the spring 06 is located in the spring groove 08 of the adjusting foot 04, and the other end abuts against the rotating disc 10. The screw 07 is screwed into the screw hole and connects to the rotating disc 10 after passing through the spring 06.

[0038] When screw 07 contacts and screws into the rotary disc 10, pressure is applied to spring 06, causing spring 06 to be compressed. By controlling the screwing depth of screw 07, the compression of spring 06 can be adjusted, thereby changing the distance between adjusting foot 04 and rotary disc 10. Since the main body 01 of the filter fixture has multiple adjusting feet 04 on its outer periphery, each adjusting foot 04 uses the same adjustment method. By adjusting the screws 07 of different adjusting feet 04 individually, the angle between the filter fixture as a whole and the rotary disc 10 can be adjusted, thereby enabling the filter 03 installed in the receiving groove of the main body 01 to achieve an ideal parallel state.

[0039] Please continue reading. Figure 3 In an optional embodiment, the pressure ring 02 is provided with a slot 09 on the side facing the through hole, and the inner diameter of the slot 09 matches the outer diameter of the filter 03.

[0040] In this embodiment, the filter 03 can be embedded in the slot 09. After being embedded in the slot 09, the axis of the filter 03 coincides with the axis of the retaining ring 02. Therefore, the slot 09 ensures that the optical center of each installed filter 03 coincides with the center of the light-passing hole. When dealing with filters 03 of different specifications, the reference axis of the optical path remains consistent. Alignment can be quickly achieved during replacement and adjustment.

[0041] Please continue reading. Figures 5 to 7 The present application further provides an embodiment of a filter wheel structure, which includes: Rotary disk 10, filter 03, and multiple filter fixtures as described in any of the preceding embodiments; the rotary disk 10 is provided with a plurality of light-transmitting holes, the filter fixture is aligned with the light-transmitting holes and connected to the rotary disk 10; the filter 03 is fixed inside the filter fixture, and the filter fixture is used to adjust the tilt angle between the filter 03 and the rotary disk 10.

[0042] The filter wheel structure, designed to work with the imaging device, consists of a rotating disk 10, filters 03, and filter fixtures. The rotating disk 10 is controllably rotatable and typically has four light-transmitting holes, though the exact number is not limited. Each light-transmitting hole corresponds to a filter fixture. By rotating the rotating disk 10, different filters 03 can be sequentially inserted into the optical path. The filter fixture adjusts its tilt angle relative to the rotating disk 10, thereby adjusting the tilt angle of the filters 03 to compensate for assembly errors and ensure that the optical surface of the filters 03 is perpendicular to the optical axis of the optical path.

[0043] In an optional embodiment, a dispensing groove 11 is provided on the light-transmitting hole, which is used to fix the filter fixture with adhesive.

[0044] Regarding the fixture body 01 in the filter fixture, the fixture body 01 is embedded in the light-transmitting hole. The side wall of the fixture body 01 is adjacent to the glue dispensing groove 11, and the gap between it and the inner wall of the light-transmitting hole is small. Therefore, by injecting glue into the glue dispensing groove 11, the glue will bond the fixture body 01 to the light-transmitting hole, thereby ensuring that the fixture body 01 will not shift when the rotary disk 10 rotates.

[0045] Three to five dispensing grooves 11 are arranged at equal intervals around the light-transmitting hole. One side of the dispensing groove 11 is a conical semi-circular groove with a large opening and a small bottom to facilitate dispensing. The other side of the dispensing groove 11 contacts the fixture body 01. After dispensing, the glue adheres to the side of the fixture body 01 and the dispensing groove 11, thus achieving a firm fixation of the fixture body 01.

[0046] The adhesive used here can be epoxy resin, acrylic resin, silicone adhesive, or UV-curable adhesive, etc. The specific choice is not limited here, but should be based on what is actually feasible.

[0047] In an optional embodiment, the rotary disc 10 is provided with a connecting groove 12, which is aligned with the adjusting foot 04 on the filter fixture and connected to the filter fixture through the adjusting member provided in the adjusting foot 04.

[0048] Specifically, the position of the connecting groove 12 is aligned with the spring groove 08 on the adjusting foot 04. One end of the spring 06 in the filter fixture is embedded in the spring groove 08, and the other end is embedded in the connecting groove 12. The screw 07 passes through the spring 06 and is screwed into the connecting groove 12, thereby realizing the connection and angle adjustment between the adjusting foot 04 and the rotary disc 10 (the screwing depth of the screw 07 is determined). By setting the connecting groove 12, it is easy to fix the spring 06 and reduce the possibility of the spring 06 shifting position.

Claims

1. A filter fixture with an adjustable filter angle, used to fix itself on a rotating disk plate of an imaging device, characterized in that, include: Tooling body, pressure ring, and adjusting components; The tooling body is provided with a receiving groove, and the bottom of the receiving groove is provided with a through hole. The receiving groove is used to place a filter. The pressure ring is located in the receiving groove and connected to the tooling body. The pressure ring is used to fix the filter in the receiving groove. The tooling body has at least three adjusting feet on its outer periphery, and each adjusting foot has one adjusting component. The adjusting component is used to connect with the rotary disc and adjust the distance between the adjusting foot and the rotary disc.

2. The filter fixture according to claim 1, characterized in that, The outer side of the pressure ring is provided with an external thread, and the inner sidewall of the receiving groove is provided with an internal thread. The external thread and the internal thread cooperate to connect the pressure ring in the receiving groove.

3. The filter fixture according to claim 2, characterized in that, The pressure ring has a bayonet on the side facing away from the filter.

4. The filter fixture according to any one of claims 1 to 3, characterized in that, A soft gasket is provided on the side of the pressure ring facing the through hole, and the soft gasket is used to abut against the filter.

5. The filter fixture according to any one of claims 1 to 3, characterized in that, The number of adjusting feet is at least three, and they are evenly distributed on the outer periphery of the tooling body.

6. The filter fixture according to any one of claims 1 to 3, characterized in that, The adjusting component includes a screw and a spring; The adjusting foot is provided with a spring groove and a screw hole. The spring is set in the spring groove and is used to abut against the wheel disc. The screw is screwed in from the screw hole, passes through the spring and is used to connect with the wheel disc.

7. The filter fixture according to claim 1, characterized in that, The pressure ring has a slot on the side facing the through hole, and the inner diameter of the slot matches the outer diameter of the filter.

8. A filter wheel structure, characterized in that, The device includes a rotary disc, a filter, and a filter fixture according to any one of claims 1 to 7; the rotary disc is provided with a plurality of light-transmitting holes, and the filter fixture is aligned with the light-transmitting holes and connected to the rotary disc; The filter is fixed inside the filter fixture, which is used to adjust the tilt angle between the filter and the rotary disc.

9. The filter wheel structure according to claim 8, characterized in that, A dispensing groove is provided on the light-transmitting hole, which is used to fix the filter fixture in conjunction with adhesive.

10. The filter wheel structure according to claim 8, characterized in that, The rotary disc is provided with a connecting groove, which is aligned with the adjusting foot on the filter fixture and connected to the filter fixture through an adjusting element provided in the adjusting foot.

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