A magnetically compatible remotely switchable filter device

Abstract

A magnetically compatible, remotely switchable filter device includes an outer box, an inner box, and a filter clamping movable block nested from the outside in. Both nesting levels are airtightly fitted and can slide against each other. The inner box divides the inner cavity of the outer box into two X-axis airtight cavities, and the filter clamping movable block divides the inner box's inner cavity into two Y-axis airtight cavities. The two Y-axis airtight cavities are connected to an external air source via second air pipe connectors. An air pipe connector guide groove is formed on the Y-axis sidewall of the outer box. The two X-axis airtight cavities are connected to an external air source via first air pipe connectors. The outer box has a first light-transmitting hole at its bottom. The inner box has two second light-transmitting holes distributed along the X-axis at its bottom. When the inner box slides, the two second light-transmitting holes align with the first light-transmitting hole. When the filter clamping movable block slides along the Y-axis to its side limit positions, different filter fixing slots align with the second light-transmitting holes. This invention allows for remote operation of filter switching.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and more specifically, to a magnetically compatible device with remotely switchable filters. Background Technology

[0002] Magnetic resonance imaging (MRI), as an advanced medical imaging technology, has advantages such as high imaging contrast, no need for contrast agents, and avoidance of ionizing radiation, and has been widely used in scientific research and clinical diagnosis.

[0003] Due to the limitations of the strong magnetic environment in the magnetic resonance observation room, equipment containing ferromagnetic materials cannot be used. Therefore, most existing magnetic resonance optical observation devices are based on magnetically compatible cameras, which can only achieve conventional single-wavelength visible light observation and cannot achieve multispectral optical observation. This situation limits the application of magnetically compatible optical imaging in scientific and clinical research.

[0004] To achieve multi-band illumination, a filter switching device is typically used for band switching. Existing filter switching devices usually employ a motor-driven mechanism to control the filter clamps for switching. However, the metal components within the motor can generate magnetic interference in a magnetic resonance environment, affecting the quality of magnetic resonance imaging and posing risks to equipment and personnel safety. Therefore, developing a fully magnetically compatible device capable of remote control and multi-band filter switching is of great significance for improving optical observation capabilities in magnetic resonance environments. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art and provide a magnetically compatible device with remotely switchable filters suitable for magnetic resonance (MRI) environments, which is suitable for optical observation in magnetic resonance environments.

[0006] This invention utilizes magnetically compatible materials and pneumatic drive technology to remotely control filter switching in a magnetic resonance environment, solving the problem of traditional filter switching devices failing to operate safely in strong magnetic field environments. The device enables dynamic switching of multi-band filters in a magnetic resonance environment and features simple operation, flexible deployment, safety, and high efficiency.

[0007] The present invention provides a magnetically compatible remotely switchable filter device for realizing filter switching in two orthogonal directions, with X and Y directions representing the two orthogonal directions of filter switching. The device includes an outer box, an inner box, and a filter clamping movable block, which are nested from the outside to the inside in a rectangular shape. The filter clamping movable block carries a filter.

[0008] The bottom, top cover, and two sides in the Y direction of the outer box and the inner box are airtightly attached and can be slidably connected to each other. The inner box divides the inner cavity of the outer box into a first airtight cavity in the X direction and a second airtight cavity in the X direction.

[0009] The bottom surface, top cover, and two sides in the X direction of the inner box and the filter clamp movable block are airtightly attached and can be slidably connected to each other. The filter clamp movable block divides the inner cavity of the inner box into a first Y-direction airtight cavity and a second Y-direction airtight cavity that are airtight to each other.

[0010] The first Y-direction airtight cavity and the second Y-direction airtight cavity of the inner box are respectively connected to the outside of the inner box through the second air pipe connector. An air pipe connector guide groove is opened on the Y-direction side wall of the outer box, and the air pipe connector is connected to the external air source through the air pipe connector guide groove. The first X-direction airtight cavity and the second X-direction airtight cavity of the outer box are respectively connected to the outside of the outer box through the first air pipe connector.

[0011] Two first air pipe connectors and two second air pipe connectors are respectively connected to an external air source;

[0012] The outer box has a first light-transmitting hole at the bottom; the inner box has two second light-transmitting holes distributed along the X direction at the bottom. When the inner box slides along the X direction to the limit positions on both sides, the second light-transmitting holes on both sides are aligned with the first light-transmitting hole respectively; the filter clamp movable block has a filter fixing groove at the bottom. When the filter clamp movable block slides along the Y direction to the limit positions on both sides, the different filter fixing grooves are aligned with the second light-transmitting holes respectively.

[0013] Preferably, all components are made of magnetically compatible materials.

[0014] Preferably, there are 4 filter fixing slots, and every 2 filter fixing slots form a group that respectively cooperate with the second light-transmitting hole on one side.

[0015] Preferably, the external air source includes an air pump, a reversing valve, and an air pipe.

[0016] Preferably, both the air pump and the reversing valve are installed outside the magnetic resonance observation room.

[0017] Preferably, the outer box has limiting components on its two sides in the X direction to limit the sliding of the inner box.

[0018] Preferably, the inner box has limiting components on its two sides in the Y direction to limit the sliding of the filter clamp movable block.

[0019] Preferably, when the inner box slides inside the outer box, the opening of the air pipe connector guide groove is always covered by the outer side wall of the inner box, thereby preventing leakage of the airtight cavity and ensuring sealing and stability.

[0020] The device of the present invention includes a pneumatic system, an outer box and an inner box consisting of a sealed housing, and a filter clamping module.

[0021] The pneumatic system includes an air pump, a reversing valve, air pipes, and movable air pipe connectors.

[0022] The air pump is the power source of the entire system, responsible for generating airflow and providing driving force.

[0023] The reversing valve is installed outside the magnetic resonance chamber and can change the airflow direction as needed, thereby altering the air pressure distribution inside the sealed housing and enabling controllable sliding of the components within the sealed housing. The air pump and the reversing valve are connected by an air pipe.

[0024] Furthermore, both the air pump and the reversing valve are installed outside the magnetic resonance observation room to avoid electromagnetic interference from affecting the imaging quality of the magnetic resonance equipment or the safety of the magnetic resonance imaging equipment.

[0025] Furthermore, to achieve filter switching in two orthogonal directions, two independent reversing valves can be used to control the airflow in each direction. The X and Y directions are used below to represent the two orthogonal directions of filter switching for clarity and convenience only, and do not possess any specific spatial directionality.

[0026] The tubing transmits the airflow generated by the air pump to the reversing valve system and connects the reversing valve system to the sealed housing. The tubing is highly airtight and made of magnetically compatible materials to ensure it is not affected by magnetic fields in the magnetic resonance environment. The length of the tubing is customized according to the specific layout of the MRI observation room to ensure system flexibility and ease of installation. The connection between the tubing and the sealed housing uses a movable tubing connector made of magnetically compatible materials to ensure smooth airflow, prevent gas leakage at the connection, and maintain the system's airtightness.

[0027] The sealing housing consists of nested Y-direction sealing housings and X-direction sealing housings, forming a multi-layer structure to ensure the airtightness and precise positioning of the device.

[0028] The Y-direction sealing housing is the outer box of the device, used to house the X-direction sealing housing, and has a light path opening, namely the first light-transmitting hole, at the center of its bottom to allow light to pass through.

[0029] Furthermore, the X-direction sealing housing is nested inside the Y-direction sealing housing, forming an inner box. Its outer wall in the Y direction is tightly fitted to the inner wall of the Y-direction sealing housing, thereby dividing the Y-direction sealing housing into two independent airtight cavities: a first X-direction airtight cavity and a second X-direction airtight cavity. The first X-direction airtight cavity and the second X-direction airtight cavity are respectively connected to the X-direction reversing valve via a movable air pipe connector and an air pipe.

[0030] Furthermore, through the airflow control of the X-direction reversing valve, the X-direction sealing housing can slide relative to the Y-direction sealing housing in the X direction under the drive of the air pump. The bottom of the X-direction sealing housing is provided with two light path openings, namely second light transmission holes. When it slides to the spatial limit position at both ends, these two second light transmission holes are aligned with the first light transmission hole of the Y-direction sealing housing, realizing the switching of the light path in the X direction.

[0031] The filter clamp module includes a filter clamp movable block and a filter.

[0032] The filter clamp movable block is nested inside the X-direction sealed housing and has multiple filter fixing slots. Each fixing slot is used to install different types of filters, or the light can pass through directly without a filter.

[0033] Furthermore, the outer wall of the filter clamp movable block in the X direction is tightly fitted with the inner wall of the X-direction sealing housing, thereby dividing the X-direction sealing housing into two independent airtight cavities, namely the first Y-direction airtight cavity and the second Y-direction airtight cavity. The first Y-direction airtight cavity and the second Y-direction airtight cavity are respectively connected to the Y-direction reversing valve through a movable air pipe connector and an air pipe.

[0034] Furthermore, since the movable tracheal connector of the X-direction sealing housing needs to pass through the Y-direction sealing housing, a tracheal connector guide groove is provided on the side wall of the Y-direction sealing housing to allow the movable tracheal connector to pass through the Y-direction sealing housing when the X-direction sealing housing slides inside the Y-direction sealing housing.

[0035] Furthermore, when the X-direction sealing housing slides inside the Y-direction sealing housing, the opening of the air pipe connector guide groove is always covered by the outer wall of the X-direction sealing housing, thereby preventing leakage of the airtight cavity and ensuring sealing and stability.

[0036] Furthermore, through the airflow control of the Y-direction reversing valve, the filter clamp movable block can slide in the Y direction relative to the X-direction sealing housing under the drive of the air pump. When the filter clamp movable block slides to the spatial limit position at both ends, the two different sets of filter fixing slots on the filter clamp movable block are aligned with the two second light-transmitting holes of the X-direction sealing housing, realizing the switching of the optical path in the Y direction.

[0037] The filter switching function is achieved through the relative sliding between the Y-direction sealing housing, the X-direction sealing housing, and the filter clamping movable block. Powered by an air pump and controlled by X-direction and Y-direction reversing valves, the sliding of the X-direction sealing housing relative to the Y-direction sealing housing switches the optical path opening in the X direction, while the sliding of the filter clamping movable block relative to the X-direction sealing housing switches the filter in the Y direction. Both are achieved through independent airtight chambers and reversing valves, ensuring the accuracy and stability of the remote switching process.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] This invention provides a filter switching device suitable for magnetic field environments, capable of stable operation in a magnetic resonance environment. All components of the device located within the magnetic resonance chamber are made of magnetically compatible materials, avoiding electromagnetic interference and safety hazards associated with electronic components in traditional filter switching devices within a magnetic resonance environment. The air pump and reversing valve are installed outside the magnetic resonance observation room, enabling remote pneumatic operation through flexibly arranged air pipes, effectively ensuring the safety of experimental personnel and the operational reliability of the equipment.

[0040] This invention employs a magnetically compatible design and supports remote control, allowing filter switching to be performed without personnel entering the magnetic resonance imaging (MRI) observation room. This avoids interference with the normal operation of the MRI equipment and enables flexible adjustment of the filter state without interrupting the MRI process, thus improving experimental efficiency. Furthermore, this device is also suitable for other filter switching scenarios with electromagnetic interference or where personnel cannot easily access the site, such as optical observations in certain high-radiation or enclosed environments.

[0041] Furthermore, this invention supports dynamic switching of up to four filter channels, meeting the needs of multi-band optical observation. Filter switching does not require complex electronic circuit control; it adopts an airflow-driven method, ensuring precise positioning during the switching process, thereby improving experimental efficiency and reducing operation time. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention, in which the sealing shell and the filter clamp module are disassembled and unfolded along the axial direction.

[0044] Figure 2 This is a top view of the Y-direction sealing housing and the X-direction sealing housing in the device of the present invention;

[0045] Figure 3 This is a top view of the X-direction sealing housing and the movable block of the filter clamp in the device of the present invention. Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0047] Example 1

[0048] This embodiment provides a magnetically compatible device with remotely switchable filters, suitable for optical observation in a magnetic resonance environment. The overall structure of the device is shown in the attached figure. Figure 1 As shown, the device includes an air pump 1, an air pipe 2, an X-direction reversing valve 3, a Y-direction reversing valve 4, a Y-direction sealing housing 5, an X-direction sealing housing 6, a movable air pipe connector 7, a filter clamping block 8, a filter 9, an X-direction housing sealing cover 10, and a Y-direction housing sealing cover 11. The Y-direction sealing housing 5 and the Y-direction housing sealing cover 11 form the outer casing, while the X-direction sealing housing 6 and the X-direction housing sealing cover 10 form the inner casing. These components, through precise design and layout, work together to form a complete pneumatic drive system, enabling rapid and precise filter switching while ensuring the magnetic compatibility and safety of the device in a magnetic resonance environment.

[0049] Air pump 1 is the power source for the entire system, responsible for generating airflow and providing driving force. The air pump is installed outside the magnetic resonance observation room to avoid electromagnetic interference from it affecting the imaging quality of the magnetic resonance equipment or its safety.

[0050] The air tube 2 consists of two sets of air tubes. One set transmits the airflow generated by the air pump 1 to the reversing valve system, including the X-direction reversing valve 3 and the Y-direction reversing valve 4. The other set connects the reversing valve system to the sealing housing, including the Y-direction sealing housing 5 and the X-direction sealing housing 6. The length of the air tube 2 is customized according to the specific layout of the magnetic resonance observation room to ensure the system's flexibility and ease of installation. The air tube 2 has high airtightness and is made of non-magnetic materials to ensure that it is not affected by magnetic fields in the magnetic resonance environment.

[0051] The X-direction reversing valve 3 and the Y-direction reversing valve 4 are installed outside the magnetic resonance chamber, controlling the airflow pressure in the X and Y directions respectively. When the air pump 1 supplies airflow to the X-direction reversing valve 3 through the air pipe 2, the X-direction reversing valve 3 will select the airflow direction according to the demand, allowing the airflow to enter the Y-direction sealing housing 5. When the air pump 1 supplies airflow to the Y-direction reversing valve 4 through the air pipe 2, the Y-direction reversing valve 4 will select the airflow direction according to the demand, allowing the airflow to enter the X-direction sealing housing 6.

[0052] The Y-direction sealing housing 5 and the X-direction sealing housing 6 are made of magnetically compatible non-ferromagnetic materials. The X-direction sealing housing 6 is nested inside the Y-direction sealing housing 5. The X-direction sealing housing 6 can slide relative to the Y-direction sealing housing 5 along the X direction, and its two sides in the Y direction are tightly against the inner wall of the Y-direction sealing housing 5, thereby dividing the Y-direction sealing housing 5 into a first X-direction airtight cavity 51 and a second X-direction airtight cavity 52, as shown below. Figure 2 As shown. The Y-direction sealing housing 5 has two movable air pipe joints 71 and 72 on its two sides in the X direction. The first X-direction airtight chamber 51 and the second X-direction airtight chamber 52 are connected to the X-direction reversing valve 3 through the movable air pipe joints 71 and 72 and the air pipe 2, respectively.

[0053] The X-direction sealing housing 6 has two movable air pipe joints 73 and 74 on its two sides in the Y direction. The Y-direction sealing housing 5 has air pipe joint guide grooves 53 and 54 on its two sides in the Y direction. The movable air pipe joints 73 and 74 of the X-direction sealing housing 6 extend out of the Y-direction sealing housing 5 through the air pipe joint guide grooves 53 and 54, respectively, and are connected to the Y-direction reversing valve 4 through the air pipe 2.

[0054] When the X-direction sealing housing 6 slides along the X direction inside the Y-direction sealing housing 5, the air pipe connector guide grooves 53 and 54 and the movable air pipe connectors 73 and 74 form a spatial limit on the sliding of the X-direction sealing housing 6, or the two sides of the Y-direction sealing housing 5 in the X direction form a spatial limit on the sliding of the X-direction sealing housing 6. The actual spatial limit depends on which of the two spatial limits is reached first. When the X-direction sealing housing 6 slides between the two spatial limits along the X direction inside the Y-direction sealing housing 5, the outer wall of the X-direction sealing housing 6 always covers the opening of the air pipe connector guide grooves 53 and 54, so that the guide grooves 53 and 54 are not connected to the airtight cavities 51 and 52, thereby ensuring the airtightness of the airtight cavity 51 or airtight cavity 52.

[0055] The first light-transmitting hole 55 at the bottom center of the Y-direction sealing housing 5 allows light to pass through. The bottom of the X-direction sealing housing 6 has a second light-transmitting hole 61 and a second light-transmitting hole 62. When the X-direction sealing housing 6 slides to the two side spatial limits in the X direction, the second light-transmitting hole 61 and the second light-transmitting hole 62 are aligned with the first light-transmitting hole 55 to ensure that light passes through.

[0056] The movable air pipe connector 7 includes movable air pipe connectors 71 and 72 connecting the air pipe 2 to the Y-direction sealing housing 5, and movable air pipe connectors 73 and 74 connecting the air pipe 2 to the X-direction sealing housing 6, respectively allowing airflow to communicate with the interiors of the Y-direction sealing housing 5 and the X-direction sealing housing 6. The connector structure is designed using magnetically compatible materials to ensure smooth airflow transmission, prevent gas leakage at the connector, and maintain the airtightness of the system.

[0057] The filter clamping movable block 8 is installed inside the X-direction sealing housing 6 and is the component for mounting the filter 9. The filter clamping movable block 8 can slide relative to the X-direction sealing housing 6 along the Y-direction, and its two sides in the X-direction are in close contact with the inner wall of the X-direction sealing housing 6, thereby dividing the X-direction sealing housing 6 into a first Y-direction airtight cavity 63 and a second Y-direction airtight cavity 64, as shown below. Figure 3 As shown. The first Y-direction airtight chamber 63 and the second Y-direction airtight chamber 64 are connected to the Y-direction reversing valve 4 through movable air pipe joints 73 and 74 and air pipe 2, respectively.

[0058] The filter clamp movable block 8 is equipped with four filter fixing slots 81, 82, 83, and 84, which can install up to four different types of filters 9, or you can choose not to install them and let the light pass through directly.

[0059] When the filter clamp movable block 8 slides along the Y direction inside the X-direction sealed housing 6, the two sides of the X-direction sealed housing 6 in the Y direction form a spatial limit for the sliding of the filter clamp movable block 8. When the filter clamp movable block 8 slides to one side of the spatial limit in the Y direction, the fixing grooves 81 and 82 are aligned with the second light-transmitting holes 61 and 62. When it slides to the other side of the spatial limit, the fixing grooves 83 and 84 are aligned with the second light-transmitting holes 61 and 62.

[0060] The filter 9 is installed in the fixing slot of the filter clamp movable block 8. Depending on the experimental requirements, different wavelength optical filters can be selected, such as visible light filters, infrared filters, etc., or no filter may be chosen. The filter is made of a magnetically compatible material with high transmittance at specific wavelengths to ensure its stability and high optical performance in a magnetic resonance environment.

[0061] The X-direction sealing housing cover 10 and the Y-direction sealing housing cover 11 are made of magnetically compatible material. The X-direction sealing housing cover 10 is installed on the upper part of the X-direction sealing housing 6, and its bottom is in close contact with the top of the filter clamping movable block 8, ensuring that the first Y-direction airtight cavity 63 and the second Y-direction 64 are not connected. The X-direction sealing housing cover 10 has openings at corresponding positions directly above the second light-transmitting holes 61 and 62 at the bottom of the X-direction sealing housing 6 to allow light to pass through. The Y-direction sealing housing cover 11 is installed on the upper part of the Y-direction sealing housing 5, and its bottom is in close contact with the X-direction sealing cover 10, ensuring that the first X-direction airtight cavity 51 and the second X-direction 52 are not connected. The Y-direction sealing housing cover 11 has an opening at corresponding position directly above the first light-transmitting hole 55 at the bottom of the Y-direction sealing housing 5 to allow light to pass through.

[0062] During filter switching, the air pump 1 starts and controls the gas pressure of the first X-direction airtight chamber 51 and the second X-direction airtight chamber 52 through the X-direction reversing valve 3, pushing the X-direction sealing housing 6 to slide along the X direction inside the Y-direction sealing housing 5. When the X-direction sealing housing 6 slides to the end space limit in the X direction, the second light-transmitting hole 61 and the second light-transmitting aperture 62 are aligned with the first light-transmitting hole 55, completing the X-direction filter channel switching. The gas pressure of the first Y-direction airtight chamber 63 and the second Y-direction airtight chamber 64 is controlled by the Y-direction reversing valve 4, pushing the filter clamp movable block 8 to slide along the Y direction inside the X-direction sealing housing 6. When the filter clamp movable block 8 slides to one side of the spatial limit in the Y direction, the fixing grooves 81 and 82 and their filter 9 are aligned with the second light-transmitting hole 61 and the second light-transmitting hole 62. Based on the relative position of the X-direction sealing housing 6 inside the Y-direction sealing housing 5 at this time, the fixing groove 81, the second light-transmitting hole 61, and the first light-transmitting hole 55 are collinear, allowing light to pass through; or the fixing groove 82, the second light-transmitting hole 62, and the first light-transmitting hole 55 are collinear, allowing light to pass through. Similarly, when sliding to the other side of the spatial limit, the fixing groove 83 or the fixing groove 84 can be aligned with the first light-transmitting hole 55. By using the above method, remote switching of four different filters can be achieved.

[0063] This invention discloses a magnetically compatible, remotely switchable filter device for optical observation in a magnetic resonance (MRI) environment. This device filters optical fibers at the front of the lens of a magnetically compatible camera. Due to the strong magnetic environment of an MRI observation chamber, ferromagnetic objects cannot be brought inside. Existing optical observations under MRI rely on conventional single-wavelength visible light observations using magnetically compatible cameras, lacking multi-wavelength filter switching capabilities, thus limiting its application in scientific research. Conventional filter switching requires motor-controlled filter clamps to switch between different wavelengths, which is not feasible within an MRI observation chamber, especially inside a magnet. This invention uses gas as the switching power source. The filter clamp module and sealed cavity are made of a fully magnetically compatible polymer material. A gas pipe connects the cavity to a control valve. The length of the gas pipe can be flexibly customized according to the MRI observation room. The pneumatic device for switching the gas path is placed outside the MRI observation chamber, without affecting the normal operation of the MRI equipment. This invention allows for remote operation of filter switching, ensuring personnel safety and saving operation time. It also features four filter channels, enabling dynamic switching of multi-band filters in a magnetic resonance environment. It is characterized by simple operation, flexible layout, safety and high efficiency.

[0064] Compared to existing technologies, the structural design of this embodiment ensures stable operation of the filter switching device under a magnetic field. The components within the magnetic resonance chamber are made of magnetically compatible materials, eliminating the use of electronic components and avoiding electromagnetic interference and safety hazards inherent in the magnetic resonance environment. The air pump and reversing valve are installed outside the magnetic resonance observation room, enabling remote pneumatic operation via a flexible air tube, ensuring the safety of personnel and equipment. This embodiment supports remote control of filter switching without requiring personnel to enter the magnetic resonance observation room, avoiding interference with the normal operation of the magnetic resonance imaging equipment and improving experimental efficiency. This embodiment can switch four filter channels, effectively meeting the needs of multi-band optical observation. The filter switching operation requires no complex electronic control; airflow switching is simple, efficient, and accurately positioned, saving operation time.

[0065] Example 2

[0066] This embodiment provides a simplified form of the technical solution of the present invention. In this simplified form, the inner box (X-direction sealed housing), Y-direction reversing valve, and corresponding air pipes and movable air pipe connectors are omitted. The filter clamping movable block is directly nested inside the outer box (Y-direction sealed housing). The outer box forms two airtight cavities on both sides of the filter clamping movable block and slides along the X-direction under the drive of airflow. In this way, the device can realize the switching function of two types of filters in a single direction, which is suitable for scenarios with fewer requirements for filter types, while retaining high airtightness and magnetic compatibility.

[0067] In the description of the embodiments of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "X direction", "Y direction", 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 present invention 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 present invention.

[0068] The above description is merely a preferred embodiment of the present invention. Although the present invention has been disclosed above with reference to preferred embodiments, the content described is only for the purpose of facilitating understanding of the present invention and is not intended to limit the present invention. Any person skilled in the art to which this invention pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed herein, but the patent protection scope of the present invention shall still be determined by the scope defined in the appended claims.

Claims

1. A magnetically compatible remotely switchable optical filter device for enabling filter switching in two orthogonal directions, with X and Y directions representing the two orthogonal directions of filter switching, characterized in that, It comprises an outer box, an inner box and a filter clamp movable block in turn nested from outside to inside in a rectangular body, and the filter clamp movable block is loaded with filters; The bottom surface, upper cover and Y-direction two side surfaces of the outer box and the inner box are in air-tight close contact and can be connected with each other in mutual sliding, and the inner box separates the inner cavity of the outer box into the first X-direction air-tight cavity and the second X-direction air-tight cavity in air-tightness; The bottom surface, upper cover and X-direction two side surfaces of the inner box and the filter clamp movable block are in air-tight close contact and can be connected with each other in mutual sliding, and the filter clamp movable block separates the inner cavity of the inner box into the first Y-direction air-tight cavity and the second Y-direction air-tight cavity in air-tightness; The first Y-direction air-tight cavity and the second Y-direction air-tight cavity of the inner box are connected with the outside of the inner box through the second air pipe joint respectively, the Y-direction side wall of the outer box is provided with an air pipe joint guide groove, and the air pipe joint is connected with the outside air source through the air pipe joint guide groove; the first X-direction air-tight cavity and the second X-direction air-tight cavity of the outer box are connected with the outside of the outer box through the first air pipe joint respectively; The two first air pipe joints and the two second air pipe joints are connected with the outside air source respectively; The outer box is provided with a first light transmission hole in the bottom, the inner box is provided with two second light transmission holes distributed along the X-direction in the bottom, when the inner box is slid along the X-direction to the limit position on both sides, the second light transmission holes on both sides are aligned with the first light transmission hole respectively, the filter clamp movable block is provided with a filter fixing groove in the bottom, and when the filter clamp movable block is slid along the Y-direction to the limit position on both sides, different filter fixing grooves are aligned with the second light transmission holes respectively.

2. A magnetically compatible remotely switchable optical filter device as claimed in claim 1, characterized in that, All components are made of magnetically compatible materials.

3. A magnetically compatible remotely switchable optical filter device as claimed in claim 1, wherein, The filter fixing groove has four, and every two filter fixing grooves form a group and are matched with the second light transmission hole on one side.

4. A magnetically compatible remotely switchable optical filter device as claimed in claim 1, characterized in that, The outside air source comprises an air pump, a reversing valve and an air pipe.

5. A magnetically compatible remotely switchable optical filter device as claimed in claim 4, wherein, The air pump and the reversing valve are installed outside the magnetic resonance observation room.

6. A magnetically compatible remotely switchable optical filter device as claimed in claim 1, wherein, The X-direction two side surfaces of the outer box are provided with limiting components for limiting the sliding of the inner box.

7. A magnetically compatible remotely switchable optical filter device as claimed in claim 1, wherein, The Y-direction two side surfaces of the inner box are provided with limiting components for limiting the sliding of the filter clamp movable block.

8. A magnetically compatible remotely switchable optical filter device as claimed in claim 1, wherein, When the inner box is slid in the outer box, the opening of the air pipe joint guide groove is always covered by the outer side wall of the inner box, so as to avoid the leakage of the air-tight cavity and ensure the sealing and stability.

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