A flexible mirror mount for a dichroic mirror and optical instrument

Abstract

This application discloses a flexible frame device and optical instrument specifically for a dichroic mirror, including a frame body, a first actuator, and a second actuator. The frame body includes a first mounting portion, a first transmitting portion, and a first connecting portion. The first mounting portion and the first transmitting portion are disposed opposite to each other, and the first connecting portion is located between the first mounting portion and the first transmitting portion. The first mounting portion is used to mount the dichroic mirror, and the first transmitting portion and the first connecting portion have a through-hole. The first mounting portion and the first connecting portion are connected by a first flexible band, and the first transmitting portion and the first connecting portion are connected by a second flexible band. The first actuator is located on the side of the first connecting portion away from the first relative position and is used to increase the distance between the first connecting portion and the first mounting portion during the adjustment process. The second actuator is located on the side of the first connecting portion away from the second relative position and is used to increase the distance between the first connecting portion and the first transmitting portion during the adjustment process. This enables precise adjustment of the dichroic mirror in two degrees of freedom.

Description

Technical Field

[0001] This invention relates to the field of optical equipment technology, and more specifically, to a flexible frame device and optical instrument specifically for dichroic mirrors. Background Technology

[0002] A dichroic mirror is an important optical component widely used in high-precision optical equipment such as laser systems, spectroscopic analysis instruments, fluorescence microscopes, and optical interferometers. The main function of a dichroic mirror is to split or combine light based on its wavelength characteristics, allowing light of a specific wavelength to pass through while reflecting other wavelengths, or vice versa. In optical systems, the installation angle of the dichroic mirror is crucial to the accuracy of the optical path. It typically needs to be precisely adjusted to a 45° angle or other specific angle to ensure that the incident, reflected, and transmitted light paths meet design requirements.

[0003] Existing dichroic lens frames primarily employ mechanical hinge structures, spring-loaded elastic structures, or threaded adjustment mechanisms for angle adjustment. Mechanical hinge structures connect the various components of the frame via hinges, using screws or knobs for angle adjustment. However, this structure has hinge gaps, making it prone to loosening and backlash during adjustment, resulting in low adjustment accuracy and poor repeatability. Spring-loaded elastic structures utilize the elastic deformation of springs for angle adjustment, but springs are prone to fatigue failure after prolonged use, causing changes in the elastic coefficient and affecting adjustment stability and accuracy. Threaded adjustment mechanisms achieve fine-tuning through the helical transmission of threaded pairs, but threaded pairs suffer from high frictional resistance, are prone to jamming, and are susceptible to stress concentration during adjustment, leading to lens deformation or damage.

[0004] Furthermore, existing eyeglass frame devices typically employ a coupled structure design for multi-degree-of-freedom adjustment, meaning one adjustment mechanism simultaneously affects multiple degrees of freedom. This leads to coupling interference during adjustment, requiring the operator to repeatedly coordinate multiple adjustment mechanisms to achieve the target angle, making the process cumbersome and inefficient. Additionally, existing eyeglass frame devices are structurally complex, with numerous parts, cumbersome assembly processes, and high production costs. Moreover, due to the clearances between parts and assembly errors, it is difficult to guarantee high-angle adjustment accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a flexible frame device and optical instrument specifically for dichroic mirrors, which can achieve precise angle adjustment of dichroic mirrors in two degrees of freedom.

[0006] The embodiments of the present invention are implemented as follows: In a first aspect, an embodiment of this application provides a flexible eyeglass frame device specifically for a dichroic mirror, comprising a frame body, a first actuator, and a second actuator; the frame body includes a first mounting portion, a first transmissive portion, and a first connecting portion, wherein the first mounting portion and the first transmissive portion are disposed opposite to each other, and the first connecting portion is located between the first mounting portion and the first transmissive portion; the first mounting portion is provided with a mounting hole for mounting a dichroic mirror, the first transmissive portion and the first connecting portion are permeated by a transmissive hole, and the axis of the transmissive hole intersects with the mirror surface of the dichroic mirror; a first relative position of the first mounting portion and the first connecting portion is connected by a first flexible band, and a second relative position of the first transmissive portion and the first connecting portion is connected by a second flexible band, wherein the first relative position and the second relative position are respectively located on two adjacent sides of the first connecting portion; The first actuator is located on the side of the first connecting portion away from the first relative position, and is used to increase the distance between the first connecting portion and the first mounting portion during the adjustment process; The second actuator is located on the side of the first connecting portion away from the second relative position, and is used to increase the distance between the first connecting portion and the first transmissive portion during the adjustment process.

[0007] In a possible implementation, the first actuator includes: A first spherical structure is disposed between the first connecting part and the first mounting part. The inner side of the first connecting part and / or the first mounting part is provided with a first inclined surface, and the outer side of the first spherical structure is in contact with the first inclined surface. The first adjusting rod is movable along its axial direction, and its end contacts the first spherical structure during the movement.

[0008] In a possible implementation, the inner side of the first connecting portion and / or the first mounting portion is further provided with a first guide rail structure, the first guide rail structure is disposed on the first inclined surface or opposite to the first inclined surface, and the first spherical structure is located on the first guide rail structure.

[0009] In a possible implementation, the second actuator includes: The second spherical structure is disposed between the first connecting part and the first transmitting part. The inner side of the first connecting part and / or the first transmitting part is provided with a second inclined surface, and the outer side of the second spherical structure is in contact with the second inclined surface. The second adjusting rod is movable along its axis, and its end contacts the second spherical structure during the movement.

[0010] In a possible implementation, the inner side of the first connecting portion and / or the first transmissive portion is further provided with a second guide rail structure, the second guide rail structure is disposed on the second inclined surface or opposite to the second inclined surface, and the second spherical structure is located on the second guide rail structure.

[0011] In a possible implementation, there are two transmission holes, which are symmetrically arranged on the first transmission part and the first connecting part.

[0012] In a possible implementation, a second mounting portion is also included, which is disposed opposite to the first transmission portion and has a mounting hole on its side for connecting the connecting rod structure. The second mounting portion passes through the transmission hole.

[0013] In a possible implementation, a mounting base is also included, which is disposed on the same side of the first mounting portion, the first connecting portion, and the first transmissive portion, and the first adjusting rod and the second adjusting rod are respectively disposed on the mounting base.

[0014] In a possible implementation, the first adjusting rod includes a first screw and a first threaded sleeve, one end of the first screw is used to contact the first ball structure, and the first threaded sleeve is sleeved on the other end of the first screw and disposed on the mounting base; The second adjusting rod includes a second screw and a second screw sleeve. One end of the second screw is used to contact the second spherical structure, and the second screw sleeve is sleeved on the other end of the second screw and located on the mounting base.

[0015] Secondly, this application also provides an optical instrument, including the aforementioned flexible frame device for dichroic mirrors.

[0016] The beneficial effects of the embodiments of the present invention are: The first mounting part fixes the dichroic mirror through mounting holes. The transmission holes on the first transmitting part and the first connecting part allow light to pass through. The axis of the transmission hole intersects with the mirror surface of the dichroic mirror to ensure the correct light path. When it is necessary to adjust the angle of the dichroic mirror, the first actuator acts between the first connecting part and the first mounting part, increasing the distance between them to cause the first flexible band to elastically deform, thereby causing the first mounting part to deflect slightly. At the same time, the second actuator acts between the first connecting part and the first transmitting part, increasing the distance between them to cause the second flexible band to elastically deform, thereby causing the first transmitting part to deflect slightly. Since the first relative position and the second relative position are located on two adjacent sides of the first connecting part, the two actuators can work independently without interfering with each other, realizing precise angle adjustment of the dichroic mirror in two degrees of freedom. This setting effectively solves the problems of low adjustment accuracy of existing frame and easy stress concentration during adjustment leading to lens deformation. At the same time, the flexible band connection method avoids the gap and wear problems of traditional mechanical hinges, improving the service life and adjustment repeatability of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the first angle of the flexible frame device for dichroic mirrors according to an embodiment of the present invention. Figure 2 This is a perspective view of the second angle of the flexible frame device for dichroic mirrors according to an embodiment of the present invention. Figure 3 This is a perspective view from the third angle of the flexible frame device for dichroic mirrors according to an embodiment of the present invention. Figure 4 This is a perspective view of the frame body of the flexible eyeglass frame device for dichroic mirrors according to an embodiment of the present invention; Figure 5 This is a partially exploded view of the frame body of the flexible eyeglass frame device for dichroic mirrors according to an embodiment of the present invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a plan view of the first and second actuators.

[0019] Icons: 1. Frame body; 11. First mounting part; 111. Mounting hole; 12. First transmission part; 13. First connecting part; 14. First flexible band; 15. Second flexible band; 16. First bevel; 17. Second bevel; 18. Mounting base; 19. Transmission hole; 2. First actuator; 21. First spherical structure; 22. First adjusting rod; 3. Second actuator; 31. Second spherical structure; 32. Second adjusting rod; 4. Dichromatic lens; 5. Cylindrical structure; 6. Connecting rod structure; 7. Second mounting part. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] First Embodiment Please refer to Figures 1 to 7 This embodiment provides a flexible eyeglass frame device specifically for dichroic mirrors, including a frame body 1, a first actuator 2, and a second actuator 3. The frame body 1 includes a first mounting portion 11, a first transmitting portion 12, and a first connecting portion 13. The first mounting portion 11 and the first transmitting portion 12 are disposed opposite to each other, and the first connecting portion 13 is located between the first mounting portion 11 and the first transmitting portion 12. The first mounting portion 11 has a mounting hole 111 for mounting the dichroic mirror. The first transmitting portion 12 and the first connecting portion 13 are connected by a transmitting hole 19, and the axis of the transmitting hole 19 intersects the mirror surface of the dichroic mirror. The first mounting portion 11 and the first connecting portion 13 are connected by a first mounting hole 111 for mounting the dichroic mirror. The first relative positions of the first connecting part 13 are connected by the first flexible band 14, and the second relative positions of the first transmissive part 12 and the first connecting part 13 are connected by the second flexible band 15. The first relative positions and the second relative positions are located on two adjacent sides of the first connecting part 13, respectively. The first actuator 2 is located on the side of the first connecting part 13 away from the first relative position and is used to increase the distance between the first connecting part 13 and the first mounting part 11 during the adjustment process. The second actuator 3 is located on the side of the first connecting part 13 away from the second relative position and is used to increase the distance between the first connecting part 13 and the first transmissive part 12 during the adjustment process. By using the first flexible band 14 and the second flexible band 15 to connect different parts of the frame body 1, compared with the traditional rigid connection method, this embodiment, through the setting of two independent actuators and two flexible bands, can realize independent fine adjustment of the dichroic mirror in two directions, avoiding the coupling interference generated during the adjustment of the traditional frame, and improving the adjustment accuracy and stability.

[0027] In this embodiment, the first mounting part 11 fixes the dichroic mirror through the mounting hole 111. The transmission holes 19 on the first transmission part 12 and the first connecting part 13 allow light to pass through. The axis of the transmission hole 19 intersects with the mirror surface of the dichroic mirror to ensure the correct light path. When it is necessary to adjust the angle of the dichroic mirror, the first actuator 2 acts between the first connecting part 13 and the first mounting part 11, increasing the distance between them to cause the first flexible band 14 to elastically deform, thereby causing the first mounting part 11 to deflect slightly. At the same time, the second actuator 3 acts between the first connecting part 13 and the first transmission part 12, through... Increasing the distance between the two causes the second flexible band 15 to undergo elastic deformation, thereby causing the first transmission part 12 to deflect slightly. Since the first relative position and the second relative position are located on two adjacent sides of the first connecting part 13, the two actuators can work independently without interfering with each other, realizing precise angle adjustment of the dichroic mirror in two degrees of freedom. This setting effectively solves the problems of low adjustment accuracy of existing frames and easy stress concentration during adjustment that leads to lens deformation. At the same time, the flexible band connection method avoids the gap and wear problems of traditional mechanical hinges, improving the service life and adjustment repeatability of the device.

[0028] In a preferred embodiment, the first actuator 2 includes a first spherical structure 21, a first inclined surface 16, and a first adjusting rod 22. The first spherical structure 21 is disposed between the first connecting portion 13 and the first mounting portion 11. The first inclined surface 16 is provided on the inner side of the first connecting portion 13 and / or the first mounting portion 11. The outer side of the first spherical structure 21 contacts the first inclined surface 16. The first adjusting rod 22 can move along its axial direction, and its end contacts the first spherical structure 21 during the movement. Through the cooperation of the first spherical structure 21 and the first inclined surface 16, the linear motion of the first adjusting rod 22 is converted into the rolling motion of the spherical body along the inclined surface, thereby causing a change in the distance between the first connecting portion 13 and the first mounting portion 11. The use of the spherical structure significantly reduces frictional resistance, making the adjustment process smoother. At the same time, the point contact or line contact between the spherical surface and the inclined surface can automatically compensate for assembly errors and ensure the stability of force transmission. Compared with the direct use of a screw push method, it effectively avoids the jamming phenomenon during the adjustment process and improves the sensitivity and accuracy of fine adjustment.

[0029] In this embodiment, when the first adjusting rod 22 moves along the axial direction, its end pushes the first spherical structure 21 to roll along the first inclined plane 16. During the rolling process, the first spherical structure 21 generates a separation force on the first connecting part 13 and the first mounting part 11, causing the first flexible band 14 to undergo elastic deformation, thereby realizing the angular deflection of the first mounting part 11 relative to the first connecting part 13. Since the rolling friction coefficient between the spherical structure and the inclined plane is much smaller than the sliding friction coefficient, the driving force required during the adjustment process is smaller, and the operation is more convenient. At the same time, the spherical structure can adaptively adjust its position within the inclined plane, avoiding the problem of uneven force caused by processing errors or assembly deviations. This setting enables the frame device to achieve high-precision angle adjustment, meeting the stringent requirements of high-precision optical instruments for the angle stability of dichroic mirrors.

[0030] Specifically, the first adjusting rod 22 can be any one of a screw structure, a cylinder push rod, an electromagnetic actuator, or a piezoelectric ceramic actuator. When a screw structure is used, axial displacement is achieved by rotating the screw, which has high adjustment accuracy and can self-lock to maintain the position. When a cylinder push rod is used, rapid adjustment can be achieved, but the accuracy is relatively low. When an electromagnetic actuator or a piezoelectric ceramic actuator is used, automated control and nanometer-level precision adjustment can be achieved, which is suitable for application scenarios that require remote control or ultra-high precision. The first spherical structure 21 can be a steel ball, a ceramic ball, or a hard alloy ball. The first inclined surface 16 can be set on the inner side of the first connecting part 13 or the first mounting part 11, or it can be set on the inner side of both to form a mating inclined surface, depending on the actual load requirements and space constraints.

[0031] In a preferred embodiment, the inner surface of the first connecting part 13 and / or the first mounting part 11 is further provided with a first guide rail structure. The first guide rail structure is disposed on or opposite to the first inclined surface 16, and the first ball structure 21 is located on the first guide rail structure. The first guide rail structure is used to limit the movement trajectory of the first ball structure 21, ensuring that the ball can only roll in a preset direction, and preventing the ball from shifting laterally or falling off during the adjustment process. The guide rail structure can be in the form of a V-groove, a U-groove, or a planar guide rail, or it can be two cylindrical structures 5 arranged side by side, with one side of the ball located between the two cylindrical structures 5. Through cooperation with the ball structure, a stable kinematic pair is formed. This arrangement further improves the guiding accuracy and stability of the adjustment process, and prevents adjustment errors or mechanism jamming caused by ball shift.

[0032] In this embodiment, the first guide rail structure is used in conjunction with the first inclined plane 16. The first spherical structure 21 rolls along the inclined plane under the constraint of the first guide rail structure. The guide rail structure bears the lateral force of the spherical structure, and the first adjusting rod 22 only needs to provide axial thrust. The load distribution is more reasonable. At the same time, the guide rail structure can restrict the degree of freedom of the spherical structure and ensure the repeatability of each adjustment. This setting effectively solves the problem of random displacement that may occur when the spherical structure rolls on the inclined plane, so that the frame device can maintain stable adjustment accuracy after long-term use and extend the service life of the device.

[0033] In a preferred embodiment, the second actuator 3 includes a second spherical structure 31, a second inclined surface 17, and a second adjusting rod 32. The second spherical structure 31 is disposed between the first connecting part 13 and the first transmitting part 12. The second inclined surface 17 is provided on the inner side of the first connecting part 13 and / or the first transmitting part 12. The outer side of the second spherical structure 31 contacts the second inclined surface 17. The second adjusting rod 32 can move along its axial direction, and its end contacts the second spherical structure 31 during the movement. The second actuator 3 adopts the same structural principle as the first actuator 2, but acts on different parts of the frame body 1 to achieve independent adjustment in the second direction. The two actuators are symmetrically arranged on two adjacent sides of the first connecting part 13 and do not interfere with each other. The cooperation method between the second spherical structure 31 and the second inclined surface 17 is the same as that of the first actuator 2, and it also has the advantages of low friction, high precision, and automatic compensation.

[0034] In this embodiment, when the second adjusting rod 32 moves along the axial direction, its end pushes the second spherical structure 31 to roll along the second inclined plane 17. During the rolling process, the second spherical structure 31 generates a separation force on the first connecting part 13 and the first transmitting part 12, causing the second flexible band 15 to undergo elastic deformation, thereby realizing the angular deflection of the first transmitting part 12 relative to the first connecting part 13. Since the first actuator 2 and the second actuator 3 can be operated independently, the user can first adjust the angle in one direction and then adjust the angle in the other direction, or simultaneously coordinate the adjustment of the two directions to achieve a composite angle adjustment. This setting allows the angle adjustment of the dichroic mirror to have two independent degrees of freedom, which can meet the diverse needs of different optical path systems for the angle of the dichroic mirror. At the same time, the structural consistency of the two actuators facilitates processing, manufacturing, assembly, and maintenance.

[0035] Specifically, the second adjusting rod 32 can be any one of a screw structure, a cylinder push rod, an electromagnetic actuator, or a piezoelectric ceramic actuator. The second spherical structure 31 can be made of the same or different materials and specifications as the first spherical structure 21. The second inclined surface 17 can be set on the inner side of the first connecting part 13 or the first transmission part 12. The second guide rail structure can be the same or different from the first guide rail structure. The design is optimized according to the adjustment range, accuracy requirements, and space limitations of the actual use scenario.

[0036] In a preferred embodiment, the inner surface of the first connecting portion 13 and / or the first transmitting portion 12 is further provided with a second guide rail structure. The second guide rail structure is disposed on or opposite to the second inclined surface 17, and the second spherical structure 31 is located on the second guide rail structure. The second guide rail structure has the same function as the first guide rail structure, which is used to limit the movement trajectory of the second spherical structure 31, ensuring the stability and repeatability of the adjustment process of the second actuator 3. The second guide rail structure can adopt the same specifications and form as the first guide rail structure, which facilitates standardized production and spare parts management.

[0037] In this embodiment, the second guide rail structure constrains the second spherical structure 31 to roll along the second inclined plane 17 and bears the lateral force of the second spherical structure 31, ensuring that the adjustment accuracy of the second actuator 3 is consistent with that of the first actuator 2. The presence of the two guide rail structures enables the entire frame device to have stable guiding performance in both adjustment directions, avoiding adjustment coupling problems caused by poor guidance on one side. This setting further improves the overall adjustment performance and long-term stability of the frame device.

[0038] In a preferred embodiment, there are two transmission holes 19, symmetrically arranged on the first transmission part 12 and the first connecting part 13. The symmetrical arrangement of the two transmission holes 19 allows light to pass through the frame device evenly, avoiding the problems of light path deviation or uneven light intensity caused by unilateral light transmission. The symmetrical arrangement of the transmission holes 19 also helps to balance the structure of the frame body 1, reducing thermal deformation or stress concentration caused by light path passage. Compared with the single transmission hole 19 design, the symmetrical arrangement of the double transmission holes 19 improves the stability of the light path and the mechanical performance of the device.

[0039] In this embodiment, the axes of both transmission holes 19 intersect with the mirror surface of the dichroic mirror, ensuring that both incident light and reflected / transmitted light can pass correctly through the frame assembly. The symmetrical arrangement of the transmission holes 19 gives the frame body 1 a symmetrical stiffness distribution in the optical path direction, reducing optical aberrations caused by optical path obstruction or structural asymmetry. This configuration is particularly suitable for high-precision optical instruments with high requirements for optical path quality, such as laser interferometers and spectrometers.

[0040] In a preferred embodiment, a second mounting portion 7 is also included. The second mounting portion 7 is disposed opposite to the first transmission portion 12, and has a mounting hole 111 on its side for connecting the connecting rod structure 6. The second mounting portion 7 has a transmission hole 19 extending through it. The second mounting portion 7 is used to mount the entire lens frame assembly onto the main frame or other support structure of the optical instrument. The connecting rod structure 6 enables a reliable connection between the lens frame assembly and the external structure. The transmission hole 19 on the second mounting portion 7 is aligned with the transmission holes 19 on the first transmission portion 12 and the first connecting portion 13 to ensure unobstructed light path. This arrangement allows the lens frame assembly to have an independent mounting interface, facilitating modular installation and disassembly within the optical system.

[0041] In this embodiment, the second mounting part 7 is arranged opposite to the first transmission part 12 to form the two end support structures of the eyeglass frame device. The connecting rod structure 6 can be in the form of a threaded rod, a pin, or a quick-release connector, etc. The appropriate connection method is selected according to the installation requirements. The presence of the second mounting part 7 makes the eyeglass frame device have better structural stability after installation and reduces the influence of external vibration on the angle of the dichroic mirror. This setting improves the angle maintenance capability of the eyeglass frame device under complex working conditions.

[0042] In a preferred embodiment, a mounting base 18 is also included. The mounting base 18 is located on the same side of the first mounting portion 11, the first connecting portion 13, and the first transmission portion 12. The first adjusting rod 22 and the second adjusting rod 32 are respectively mounted on the mounting base 18. The mounting base 18 provides a unified mounting reference for the first adjusting rod 22 and the second adjusting rod 32, ensuring the axial position and directional accuracy of the two adjusting rods. The mounting base 18 is fixedly connected to the frame body 1, forming a stable support structure for the adjustment mechanism. This arrangement makes the relative positional relationship of the two actuators more stable, improving the consistency and repeatability of the adjustment accuracy.

[0043] In this embodiment, the mounting base 18 can adopt an integral or split structure. The integral mounting base 18 has higher rigidity and precision, while the split mounting base 18 is easier to assemble and maintain. The first adjusting rod 22 and the second adjusting rod 32 are installed on the mounting base 18 through threaded holes, bearing seats or guide sleeves, etc. The presence of the mounting base 18 makes the axial movement of the adjusting rod more stable and reduces the shaking and deflection during the adjustment process. This setting further improves the adjustment accuracy and operation feel of the frame device.

[0044] In a preferred embodiment, the first adjusting rod 22 includes a first screw and a first threaded sleeve. One end of the first screw contacts the first spherical structure 21, and the first threaded sleeve is fitted onto the other end of the first screw and is located on the mounting base 18. The second adjusting rod 32 includes a second screw and a second threaded sleeve. One end of the second screw contacts the second spherical structure 31, and the second threaded sleeve is fitted onto the other end of the second screw and is located on the mounting base 18. The first screw and the first threaded sleeve form a helical transmission pair, and the axial displacement of the first screw is achieved by rotating the first threaded sleeve. The second screw and the second threaded sleeve form the same helical transmission pair, achieving the axial displacement of the second screw. The helical transmission has a self-locking function, and the position can be maintained without an additional locking mechanism after adjustment. At the same time, the helical transmission has a large reduction ratio, enabling fine-tuning operations.

[0045] In this embodiment, when the first threaded sleeve is rotated, the first screw moves along the axial direction and pushes the first spherical structure 21 to achieve adjustment in the first direction. When the second threaded sleeve is rotated, the second screw moves along the axial direction and pushes the second spherical structure 31 to achieve adjustment in the second direction. The outer circumference of the threaded sleeve can be provided with knurling or a handwheel for easy manual operation, or it can be connected to a motor to achieve electric adjustment. The screw pitch can be selected according to the adjustment accuracy requirements. The smaller the pitch, the higher the adjustment accuracy but the slower the adjustment speed. This setting allows the frame device to achieve high-precision manual fine adjustment, or it can be upgraded to an automated electric adjustment system, which has good scalability.

[0046] The working principle of the dichroic mirror-specific flexible frame device provided in this embodiment is as follows: First, the dichroic mirror is installed in the mounting hole 111 of the first mounting part 11. The entire frame device is fixed to the optical instrument frame by the connecting rod structure 6 of the second mounting part 7, ensuring that the transmission hole 19 is aligned with the light path. When it is necessary to adjust the angle of the dichroic mirror, the operator rotates the first or second screw sleeve, causing the corresponding screw to undergo axial displacement. The screw pushes the spherical structure to roll along the inclined plane. The spherical structure generates a separation force on the corresponding part of the frame body 1, causing the corresponding flexible band to undergo elastic deformation, thereby driving... The first mounting part 11 or the first transmission part 12 generates a slight angular deflection to achieve precise adjustment of the dichroic mirror angle. After adjustment, the self-locking characteristic of the screw drive pair maintains the adjusted position without the need for additional locking. The disassembly and installation process is as follows: loosen the connecting rod structure 6 of the second mounting part 7, remove the mirror frame device from the optical instrument frame. If the dichroic mirror needs to be replaced, the fasteners of the first mounting part 11 can be loosened, the old lens can be removed, the new lens can be installed, and then the fasteners can be tightened again. The entire device has a compact structure, high adjustment accuracy, and simple operation, and is suitable for the installation and angle adjustment needs of dichroic mirrors in various high-precision optical instruments.

[0047] Second Embodiment This embodiment provides an optical instrument, including the aforementioned flexible frame device for dichroic mirrors, which enables precise angle adjustment of the dichroic mirror in two degrees of freedom. This design effectively solves the problems of low adjustment accuracy and stress concentration during adjustment that can lead to lens deformation in existing frames. At the same time, the flexible belt connection avoids the gap and wear problems of traditional mechanical hinges, improving the service life and adjustment repeatability of the device.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flexible frame device specifically for dichroic mirrors, characterized in that, The device includes a frame body, a first actuator, and a second actuator. The frame body includes a first mounting portion, a first transmissive portion, and a first connecting portion. The first mounting portion and the first transmissive portion are disposed opposite to each other, and the first connecting portion is located between the first mounting portion and the first transmissive portion. The first mounting portion has a mounting hole for mounting a dichroic mirror. The first transmissive portion and the first connecting portion are connected by a transmissive hole, and the axis of the transmissive hole intersects the mirror surface of the dichroic mirror. The first relative position of the first mounting portion and the first connecting portion is connected by a first flexible band, and the second relative position of the first transmissive portion and the first connecting portion is connected by a second flexible band. The first relative position and the second relative position are respectively located on two adjacent sides of the first connecting portion. The first actuator is located on the side of the first connecting portion away from the first relative position, and is used to increase the distance between the first connecting portion and the first mounting portion during the adjustment process; The second actuator is located on the side of the first connecting portion away from the second relative position, and is used to increase the distance between the first connecting portion and the first transmissive portion during the adjustment process.

2. The flexible frame device for dichroic mirrors according to claim 1, characterized in that, The first actuator includes: A first spherical structure is disposed between the first connecting part and the first mounting part. The inner side of the first connecting part and / or the first mounting part is provided with a first inclined surface, and the outer side of the first spherical structure is in contact with the first inclined surface. The first adjusting rod is movable along its axial direction, and its end contacts the first spherical structure during the movement.

3. The flexible frame device for dichroic mirrors according to claim 2, characterized in that, The inner side of the first connecting part and / or the first mounting part is further provided with a first guide rail structure. The first guide rail structure is disposed on the first inclined surface or opposite to the first inclined surface, and the first spherical structure is located on the first guide rail structure.

4. The flexible frame device for dichroic mirrors according to claim 2, characterized in that, The second actuator includes: The second spherical structure is disposed between the first connecting part and the first transmitting part. The inner side of the first connecting part and / or the first transmitting part is provided with a second inclined surface, and the outer side of the second spherical structure is in contact with the second inclined surface. The second adjusting rod is movable along its axis, and its end contacts the second spherical structure during the movement.

5. The flexible frame device for dichroic mirrors according to claim 4, characterized in that, The inner side of the first connecting part and / or the first transmission part is further provided with a second guide rail structure. The second guide rail structure is disposed on the second inclined surface or opposite to the second inclined surface, and the second spherical structure is located on the second guide rail structure.

6. The flexible frame device for dichroic mirrors according to claim 1, characterized in that, The number of transmission holes is two, and they are symmetrically arranged on the first transmission part and the first connecting part.

7. The flexible frame device for dichroic mirrors according to claim 1, characterized in that, It also includes a second mounting part, which is disposed opposite to the first transmission part and has a mounting hole on its side for connecting the connecting rod structure. The second mounting part passes through the transmission hole.

8. The flexible frame device for dichroic mirrors according to claim 4, characterized in that, It also includes a mounting base, which is located on the same side of the first mounting part, the first connecting part and the first transmission part, and the first adjusting rod and the second adjusting rod are respectively located on the mounting base.

9. The flexible frame device for dichroic mirrors according to claim 4, characterized in that, The first adjusting rod includes a first screw and a first screw sleeve. One end of the first screw is used to contact the first spherical structure, and the first screw sleeve is sleeved on the other end of the first screw and disposed on the mounting base. The second adjusting rod includes a second screw and a second screw sleeve. One end of the second screw is used to contact the second spherical structure, and the second screw sleeve is sleeved on the other end of the second screw and located on the mounting base.

10. An optical instrument, characterized in that, Includes the flexible frame device for dichroic lenses as described in any one of claims 1 to 9.

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