F-p air gap etalon and adjustment control method for f-p air gap etalon

Abstract

The application relates to the technical field of optical experiments, and particularly discloses an F-P air gap standard device and an adjustment control method for the F-P air gap standard device. The F-P air gap standard device comprises a first reflector fixedly installed on a first shell and a second reflector fixedly installed on a second shell, a first high-precision adjusting mechanism is arranged on the first shell, a second high-precision adjusting mechanism is arranged on the second shell, a lateral locking mechanism is arranged on the first shell and / or the second shell, and a plurality of reverse action structures are arranged on the second shell. Through improvement on the structure of the F-P air gap standard device, high-precision adjustment of the two reflectors can be realized by fine adjustment of the second shell from two directions, mutual interference of the first high-precision adjusting mechanism and the second high-precision adjusting mechanism is effectively avoided, the efficiency and the precision of the adjustment are improved, and the difficulty of the adjustment is reduced.

Description

Technical Field

[0001] This invention relates to the field of optical experimental technology, specifically to an FP air gap etalon and an adjustment and control method for the FP air gap etalon. Background Technology

[0002] The FP air-gap etalon is used for Zeeman effect experiments. The Zeeman effect experiment requires light emitted from a mercury lamp within a permanent magnet to pass sequentially through a narrow-band filter, a condenser lens, a polarizer, the FP air-gap etalon, and an imaging system, thus forming multiple concentric ring-shaped spectral lines.

[0003] The FP air gap etalon has two mirrors. To ensure experimental accuracy, both mirrors need to have high surface accuracy, and their heights must be strictly parallel. However, the FP air gap etalon is a high-precision experimental instrument, easily affected by slight influences that can compromise the surface accuracy and relative parallelism of the two mirrors, thus affecting the experimental accuracy of the Zeeman effect. Therefore, the relative position accuracy of the two mirrors needs to be adjusted before the experiment.

[0004] Traditional air gap standards use three point-contact pads between two high-precision mirrors to initially determine the distance between them. Then, a special clamping metal ring is used to make hard contact with the mirrors on their outer sides, causing slight deformation of the pads to adjust the parallelism of the mirrors. Three equally spaced screws are then used to apply pressure to the corresponding positions of the clamping metal ring for fine-tuning of parallelism. However, using the clamping metal ring and pads in hard contact with the mirror surface causes mirror deformation, reducing the mirror's surface accuracy and thus affecting experimental precision. Furthermore, using three equally spaced screws to apply pressure means that adjusting one screw simultaneously affects the accuracy of the other two, increasing the difficulty of adjustment. Summary of the Invention

[0005] To overcome the aforementioned technical problems in the prior art, embodiments of the present invention provide an FP air gap etalon and an adjustment control method for the FP air gap etalon. By optimizing and adjusting the structure of the FP air gap etalon, the operating accuracy, adjustment stability and reliability are effectively improved, and the operating complexity is reduced.

[0006] To achieve the above objectives, embodiments of the present invention provide an FP air gap standard, the FP air gap standard comprising: a first reflector fixedly mounted on a first housing, a second reflector fixedly mounted on a second housing, the second housing being movably connected to the first housing via a movable connection structure; a first high-precision adjustment mechanism and a second high-precision adjustment mechanism disposed on the first housing; the first high-precision adjustment mechanism being disposed along a first axis of the movable connection structure, used to adjust the first parallelism of the first reflector and the second reflector from a first spatial dimension; the second high-precision adjustment mechanism being disposed along a second axis of the movable connection structure, used to adjust the second parallelism of the first reflector and the second reflector from a second spatial dimension, wherein the first spatial dimension and the second spatial dimension belong to different spatial dimensions, and the first high-precision adjustment mechanism and the second high-precision adjustment mechanism are disposed along a second axis of the movable connection structure. The second high-precision adjustment mechanism forms an interference-free adjustment structure through the movable connection structure, the first axis, and the second axis; the adjustment accuracy of the first and second high-precision adjustment mechanisms is less than or equal to 1µm; a lateral locking mechanism is provided on the first housing and / or the second housing, the lateral locking mechanism is in contact with the first reflector and / or the second housing, and the lateral locking mechanism is used to apply a lateral adjustment force to the first reflector and / or the second housing; multiple opposing action structures are evenly arranged on the second housing and distributed around the circumference of the second reflector, one end of the opposing action structure is fixedly disposed on the first housing, and the other end is connected to the second housing, the opposing action mechanism is used to apply a force opposite to that of the first and second high-precision adjustment mechanisms to the second housing.

[0007] Preferably, the movable connection structure is a universal connection structure, and the universal connection structure has an anti-slip component or a damping component.

[0008] Preferably, the first high-precision adjustment mechanism and the second high-precision adjustment mechanism have the same structure, both including: a self-locking adjustment component and a transmission component. The self-locking component is used to ensure that when the adjustment action of the second reflector stops, the second reflector can be automatically kept in the adjustment position, ensuring that the parallelism between the first reflector and the second reflector remains stable.

[0009] Preferably, the self-locking adjustment component includes an adjustment screw, the axis of which is perpendicular to the side of the first housing facing the second housing; the adjustment screw is threadedly connected to one of the first housing and the second housing; the adjustment screw and the other of the first housing and the second housing are kept relatively fixed in the axial direction of the adjustment screw.

[0010] Preferably, the transmission component includes a stepper motor and a reducer that is transmissionally connected between the stepper motor and the adjusting screw.

[0011] Preferably, the lateral locking mechanism includes a plurality of first oblique holes provided on the first housing and a first locking member slidably disposed within the first oblique holes; the plurality of first oblique holes are arranged around the first reflector, and the first locking member is driven to the first reflector; and / or the lateral locking mechanism includes a plurality of second oblique holes provided on the second housing and a second locking member slidably disposed within the second oblique holes; the plurality of second oblique holes are arranged around the second reflector, and the second locking member is driven to the second reflector.

[0012] Preferably, the reverse action structure has an elastic member that applies a tensile force to the second housing, the direction of the tensile force of the elastic member being perpendicular to the side of the first housing facing the second housing.

[0013] Accordingly, the present invention also provides an adjustment control method for an FP air gap etalon, applied to an FP air gap etalon, wherein the FP air gap etalon includes a high-precision adjustment mechanism and a lateral locking mechanism. The method includes: acquiring the original spectrum of the original FP air gap etalon; performing curve conversion processing on the original spectrum to obtain a corresponding grayscale curve; acquiring the curve features of the grayscale curve, and analyzing whether the parallelism of the original FP air gap etalon is qualified based on the curve features; if it is not qualified, determining the deviation direction and the corresponding deviation amount based on the curve features; and controlling the high-precision adjustment mechanism to perform a corresponding high-precision adjustment action based on the deviation direction and the deviation amount.

[0014] Preferably, the FP air gap etalon includes a fixed first reflector and a movable second reflector. The step of determining the deviation direction and corresponding deviation amount based on the curve features includes: acquiring a standard grayscale curve and determining the standard features of the standard grayscale curve; acquiring the feature deviation between the curve features and the standard features; performing spectral mapping on the feature deviation to obtain the spectral deviation; and determining the deviation direction and corresponding deviation amount of the second reflector relative to the first reflector based on the spectral deviation.

[0015] Preferably, the method further includes: obtaining the sharpness of the spectral line before performing curve conversion processing on the spectral line; determining whether the sharpness meets a preset sharpness requirement; if the preset sharpness requirement is not met, determining a sharpness adjustment parameter based on the sharpness; and adjusting the parallelism of the first reflector and the second reflector based on the sharpness adjustment parameter.

[0016] The present invention has at least the following technical effects through the technical solution provided by the present invention:

[0017] The parallelism between the first and second reflectors is fine-tuned using a first high-precision adjustment mechanism and / or a second high-precision adjustment mechanism. During fine-tuning, the second housing only needs to be adjusted from two directions, and interference between the first and second high-precision adjustment mechanisms is avoided, which improves adjustment efficiency and accuracy while reducing adjustment difficulty.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a structural schematic diagram of the FP air gap etalon according to some embodiments of the present invention;

[0021] Figure 2 yes Figure 1 A sectional view;

[0022] Figure 3 This is an internal schematic diagram of the second housing according to some embodiments of the present invention;

[0023] Figure 4 This is a schematic diagram of the reverse action structure shown in some embodiments of the present invention;

[0024] Figure 5 This is a flowchart illustrating an adjustment and control method for an FP air gap etalon according to some embodiments of the present invention.

[0025] Explanation of reference numerals in the attached figures

[0026] 110. First reflecting mirror; 120. Second reflecting mirror; 210. First housing; 220. Second housing; 310. First high-precision adjustment mechanism; 311. Self-locking adjustment component; 312. Transmission component; 3121. Worm gear; 3122. Worm wheel; 320. Second high-precision adjustment mechanism; 400. Lateral locking mechanism; 410. First oblique hole; 420. First locking component; 430. Second oblique hole; 440. Second locking component; 500. Reverse action structure; 510. Mounting hole; 520. Screw; 530. Elastic component; 600. Universal connection structure; 700. Support structure. Detailed Implementation

[0027] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0028] In this embodiment of the invention, the term "multiple" refers to two or more. Therefore, in this embodiment, "multiple" can also be understood as "at least two." "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship. Furthermore, it should be understood that in the description of this embodiment of the invention, terms such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or order.

[0029] Under current technological conditions, adjusting the parallelism of two reflectors involves using a special clamping metal ring and shims in hard contact with the reflectors, causing slight deformation of the shims to adjust the parallelism. Then, three equally spaced screws are used to apply pressure to the corresponding positions of the clamping metal ring for fine-tuning of the parallelism. However, using the clamping metal ring and shims in hard contact with the reflectors reduces the surface accuracy of the reflectors, thus affecting the accuracy of the experiment. Furthermore, applying pressure with three equally spaced screws simultaneously means that adjusting one screw will affect the accuracy of the other two, increasing the difficulty of adjustment.

[0030] Figure 1 This is a structural schematic diagram of the FP air gap etalon according to some embodiments of the present invention. Figure 2 yes Figure 1 A sectional view. Figure 3 This is an internal schematic diagram of the second housing according to some embodiments of the present invention.

[0031] Please see Figure 1 , Figure 2 This invention provides an FP air-gap etalon for conducting Zeeman effect experiments. The Zeeman effect experiment requires light emitted from a mercury lamp within a permanent magnet to sequentially pass through a narrow-band filter, a condenser lens, a polarizer, the FP air-gap etalon, and an imaging system. The imaging system is capable of forming multiple concentric ring spectral lines.

[0032] In one possible embodiment, the FP air gap etalon includes a first reflector 110 fixedly mounted on a first housing 210 and a second reflector 120 fixedly mounted on a second housing 220.

[0033] The first reflector 110 and the second reflector 120 are symmetrically spaced. Both the first reflector 110 and the second reflector 120 have opposing inner and outer surfaces, which are set at an angle. The corresponding inner surfaces of the first reflector 110 and the second reflector 120 face inward and are arranged parallel to each other.

[0034] In practical use, the first housing 210 can remain fixed. A support structure 700, such as a bracket or support, can be connected to the first housing 210. The support structure provides support for the first housing 210, maintaining a certain height and stability.

[0035] The second housing 220 can be movably connected to the first housing 210 via a movable connection structure. The movable connection may include a rotational connection and / or a sliding connection, thereby adjusting the angle and / or position of the second housing 220 relative to the first housing 210, and thus adjusting the angle and / or position of the second reflector 120 relative to the first reflector 110.

[0036] The first housing 210 can have a variety of shapes, such as at least one of cylindrical, prismatic, etc., and its specific shape and size can be set according to actual needs.

[0037] A first high-precision adjustment mechanism 310 and a second high-precision adjustment mechanism 320 are provided on the first housing 210.

[0038] The first high-precision adjustment mechanism 310 is disposed along the first axis of the movable connection structure and is used to adjust the first parallelism between the first reflector 110 and the second reflector 120 from a first spatial dimension. In one embodiment, the first high-precision adjustment mechanism 310 can adjust the first parallelism between the first reflector 110 and the second reflector 120 by rotating the second housing 220 to drive the second reflector 120 to rotate synchronously. For example, the first high-precision adjustment mechanism 310 can drive the second housing 220 to rotate around the first rotation center line of the movable connection structure.

[0039] The second high-precision adjustment mechanism 320 is arranged along the second axis of the movable connection structure and is used to adjust the second parallelism of the first reflector 110 and the second reflector 120 from a second spatial dimension. The first spatial dimension and the second spatial dimension are different spatial dimensions; for example, the first spatial dimension is the XZ spatial dimension of the three-dimensional coordinate axes, and the second spatial dimension is the XY spatial dimension of the three-dimensional coordinate axes. For example, the second high-precision adjustment mechanism 320 can rotate the second housing 220 to drive the second reflector 120 to rotate synchronously, thereby adjusting the second parallelism of the first reflector 110 and the second reflector 120. The second high-precision adjustment mechanism 320 can also drive the second housing 220 to rotate around a second rotation center.

[0040] The first high-precision adjustment mechanism and the second high-precision adjustment mechanism constitute an interference-free adjustment structure through the movable connection structure, the first axis, and the second axis. For example, in one embodiment, the first high-precision adjustment mechanism is disposed in the vertical direction of the movable connection structure, and the second high-precision adjustment mechanism is disposed in the horizontal direction of the movable connection structure. The first high-precision adjustment mechanism and the second high-precision adjustment mechanism are arranged at a vertical angle, thereby achieving an interference-free adjustment effect under the transmission action of the movable connection structure. That is, the adjustment action of the first high-precision adjustment mechanism will not affect the adjustment action of the second high-precision adjustment mechanism, thereby overcoming the mutual interference phenomenon in the adjustment process of the existing FP air gap etalon, and improving the adjustment accuracy and adjustment reliability.

[0041] The first parallelism and the second parallelism refer to the parallelism between the inner surface of the first reflector 110 and the inner surface of the second reflector 120.

[0042] The first and second rotation center lines are non-parallel rotation centers. For example, they can be perpendicular to each other. When the second housing 220 rotates relative to the first rotation center line, the direction of rotation of the second housing 220 remains parallel to the second rotation center line. This parallel rotation direction also prevents interference between the first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320, thereby improving adjustment efficiency and accuracy. The first rotation center line can be a vertical line, and the second rotation center line can be a horizontal line.

[0043] In this embodiment of the invention, the adjustment accuracy of the first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320 is less than or equal to 1 μm. Adjustment accuracy refers to the minimum dimension by which the first high-precision adjustment mechanism 310 or the second high-precision adjustment mechanism 320 rotates or moves when adjusting the second housing 220.

[0044] The first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320 can be any of the following: a high-reduction-ratio worm gear, a stepper motor with a reducer, or a high-precision bolt, without further restrictions. Both have a self-locking adjustment component and a transmission component. For example, when it is a worm gear, its self-locking adjustment component is a threaded worm, and its transmission component is a worm wheel. When it is a stepper motor with a reducer, the self-locking adjustment component is a high-precision stepper motor, which applies a high-precision adjustment force to the second reflector 120 through the output shaft of the reducer.

[0045] Preferably, the first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320 are high-reduction-ratio worm gears. For example, the high-reduction-ratio worm gear is configured such that the tooth pitch of the gear is 0.25mm, the reduction ratio is 20:1, and the screw rotates 360 degrees for one revolution, corresponding to 12.5um, thereby achieving an adjustment accuracy of not less than 1um.

[0046] In this embodiment of the invention, the second reflector is adjusted by using two independent high-precision adjustment mechanisms, thereby effectively avoiding the influence of mutual coupling between the adjustment mechanisms and achieving reliable, high-precision parallelism adjustment.

[0047] When assembling existing FP air gap standard fixtures, the first and second reflectors need to be snapped into the first and second housings respectively. Metal rings and spacers are placed between the first reflector and the first housing, and between the second reflector and the second housing. In existing FP air gap standard fixtures, the parallelism between the two reflectors is adjusted by pressing the reflector surfaces against each other, causing slight deformation of the spacers. However, because FP air gap standard fixtures require high surface accuracy of the reflectors, while the above operation can adjust the parallelism of the two reflectors, the direct action of the metal rings and spacers on the high-precision mirror surface inevitably compromises the surface accuracy of the reflectors, reducing experimental results and failing to meet practical requirements.

[0048] To solve the above-mentioned technical problems, the embodiments of the present invention omit the metal ring and the pad. Specifically, a lateral locking mechanism 400 is provided on the first housing 210 and / or the second housing 220. The lateral locking mechanism 400 contacts the first reflector 110 and / or the second reflector 120. The lateral locking mechanism 400 is used to apply a lateral locking force to the first reflector 110 and / or the second reflector 120, thereby assembling the first reflector 110 or the second reflector 120 onto the first housing 210 or the second housing 220 respectively.

[0049] Multiple lateral locking mechanisms 400 can be provided and are arranged in a ring around the first reflector 110 and / or the second reflector 120. The multiple lateral locking mechanisms 400 simultaneously apply thrust to the first reflector 110 and / or the second reflector 120 from multiple directions, thereby locking the first reflector 110 and / or the second reflector 120.

[0050] The direction of the thrust applied by the lateral locking mechanism 400 to the first reflector 110 and / or the second reflector 120 may be inclined relative to the axial and radial directions of the first reflector 110 and / or the second reflector 120. For example, along the mounting direction of the first reflector 110 and / or the second reflector 120, the direction of the thrust is set at an acute angle relative to the axial direction of the first reflector 110 and / or the second reflector 120.

[0051] The directions of multiple thrusts can intersect at the same point on the axis of the first reflector 110 and / or the second reflector 120, which helps to make the first reflector 110 and / or the second reflector 120 bear force evenly and avoid the phenomenon of the first reflector 110 and / or the second reflector 120 being eccentric under the action of thrust, thereby helping to improve the assembly accuracy.

[0052] The first housing 210 and the second housing 220 may each have mounting holes for mounting the first reflector 110 and the second reflector 120. The first reflector 110 and the second reflector 120 may be mounted from the outside to the inside of the corresponding mounting holes.

[0053] To improve the stability and positional accuracy of the first reflector 110 and the second reflector 120, a limiting structure can be provided inside the mounting hole to restrict the extreme positions of the first reflector 110 or the second reflector 120 along the axial direction, thereby preventing the first reflector 110 or the second reflector 120 from detaching from the inside of the mounting hole. The limiting structure can include various types, such as at least one of stepped surfaces or protrusions. An elastic connection can be formed between the first reflector 110 or the second reflector 120 and the limiting structure to avoid rigid contact between the first reflector 110 or the second reflector 120 and the limiting structure, thereby preventing micro-deformation of the first reflector 110 or the second reflector 120 that would affect the surface shape accuracy. The limiting structure can be made of an elastic material, or an elastic pad made of an elastic material can be provided between the first reflector 110 or the second reflector 120 and the limiting structure. The elastic material can include at least one of rubber, silicone, and resin.

[0054] The thrust applied by the lateral locking mechanism 400 to the first reflector 110 or the second reflector 120 can be decomposed into a clamping force pointing radially toward the center of the first reflector 110 or the second reflector 120, and an inward thrust pushing the first reflector 110 or the second reflector 120 inward along the axial direction. Under the action of the inward thrust, the first reflector 110 or the second reflector 120 can be prevented from being loosened from the mounting hole.

[0055] The portion of the lateral locking mechanism 400 that contacts at least the first reflector 110 or the second reflector 120 may be elastic, so that the lateral locking mechanism 400 and the first reflector 110 or the second reflector 120 can form an elastic connection. This prevents the thrust applied by the lateral locking mechanism 400 from causing micro-deformation of the first reflector 110 or the second reflector 120, which would affect the surface shape accuracy.

[0056] Meanwhile, by utilizing the elastic connection of the lateral locking mechanism 400 and / or the limiting structure, a preload can be applied to the first reflector 110 or the second reflector 120, thereby increasing the clamping force on the first reflector 110 or the second reflector 120 and improving the stability of the first reflector 110 or the second reflector 120.

[0057] Under the action of the limiting structure or elastic pad and the lateral locking mechanism 400, the first reflector 110 or the second reflector 120 can be subjected to elastic thrust in different directions along the axial direction, so that the inner and outer sides of the first reflector 110 or the second reflector 120 can be balanced by force, which is beneficial to improving the stability and positional accuracy of the first reflector 110 or the second reflector 120.

[0058] By adjusting the preload at different positions, the position of the first reflector 110 or the second reflector 120 during assembly can be adjusted, which can eliminate the influence of factors such as machining errors and assembly errors on the assembly accuracy, so as to ensure the assembly accuracy of the first reflector 110 or the second reflector 120.

[0059] Meanwhile, in subsequent use, if the lateral locking mechanism 400 or the elastic pad fails and at least part of the elasticity is lost, the position of the first reflector 110 or the second reflector 120 can be repaired by adjusting the lateral locking mechanism 400 to apply a thrust to the first reflector 110 or the second reflector 120, thereby extending the service life of the FP air gap etalon.

[0060] Meanwhile, the obliquely positioned lateral locking mechanism 400 facilitates actual adjustment actions and partially decomposes the applied force to the sidewall, thereby appropriately reducing the direct impact on the reflector and its surface accuracy. While ensuring reliable fixation, it further reduces the impact on the mirror's accuracy, meeting the actual needs of high-precision adjustment.

[0061] After assembling and locking the first reflector 110 or the second reflector 120 using the lateral locking mechanism 400, the first housing 210 and the second housing 200 are then assembled. During the assembly of the first housing 210 and the second housing 200, the relative position of the first reflector 110 and the second reflector 120 can also be adjusted by adjusting the thrust applied to the first reflector 110 or the second reflector 120 by the lateral locking mechanism 400.

[0062] In practical applications, since the FP air gap etalon is a high-precision experimental instrument, manual adjustment is often required during the adjustment of existing instruments, especially in experiments involving the Zeeman effect. This is often used as a teaching point for students / users to enhance their understanding of the FP etalon. For example, manually tightening bolts to adjust the parallelism of corresponding parts may appear to indicate that the adjustment is in place, but when the hand leaves the FP air gap etalon, hand tremors or disturbances to the instrument can cause a slight offset / rotation of the bolt, thus reducing the actual adjustment effect.

[0063] To address the aforementioned technical issues, in one embodiment, the FP air gap etalon further includes a plurality of reverse action structures 500 for applying a force to the second housing 220 to bring the second housing 220 closer to the first housing 210.

[0064] Multiple counteracting structures 500 can be evenly arranged on the second housing 220 and distributed around the second reflector 120, so that the second housing 220 is subjected to uniform force.

[0065] One end of the reverse action structure 500 is fixedly mounted on the first housing 210, and the other end is connected to the second housing 220. The force exerted by the reverse action structure 500 on the second housing 220 is opposite in direction to the force exerted by the first high-precision adjustment mechanism 310 or the second high-precision adjustment mechanism 320 on the second housing 220.

[0066] Preferably, the reverse action structure 500 is either an elastic action structure or a magnetic action structure.

[0067] At least a portion of the reverse-action structure 500 may be elastic, and the elasticity of the reverse-action structure 500 itself applies a force to the second housing 220. When adjusting the first high-precision adjustment mechanism 310 and / or the second high-precision adjustment mechanism 320, it is necessary to overcome the force applied by the reverse-action structure 500. The force applied by the reverse-action structure 500 to the second housing 220 can eliminate the fit clearance between structures caused by machining errors, wear, etc., thereby improving the adjustment accuracy and preventing at least a portion of the first high-precision adjustment mechanism 310 and / or the second high-precision adjustment mechanism 320 from springing back.

[0068] The FP air gap standard provided in this embodiment of the invention can adjust and lock the positions of the first reflector 110 and the second reflector 120 during assembly using a lateral locking mechanism 400. It also allows for initial adjustment of the relative positions of the first reflector 110 and the second reflector 120 during assembly, and fine-tuning of the parallelism between the first reflector 110 and the second reflector 120 using a first high-precision adjustment mechanism 310 and / or a second high-precision adjustment mechanism 320. During fine-tuning, only the second housing 220 needs to be adjusted from two directions, avoiding mutual interference between the first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320, which improves adjustment efficiency and accuracy while reducing adjustment difficulty.

[0069] Furthermore, through the aforementioned reverse action structure 500, the reverse action force of the reverse action structure 500 is combined with the forward action force of the high-precision adjustment mechanism, enabling it to achieve mechanical self-locking. For example, the reverse action force enables the worm gear or reducer to achieve physical self-locking. When the adjustment is in place, even if there is hand tremor or slight disturbance, the final adjustment position will not produce any offset / rotation, thereby achieving accurate and reliable parallelism adjustment and meeting actual needs.

[0070] In existing FP air gap etalons, the first housing 210 and the second housing 220 are often connected by rotation. After a long period of use, the rotating parts will develop gaps due to wear, resulting in tilting in three-dimensional space (e.g., Y coordinate). Since the first reflector 110 and the second reflector 120 need to be parallel to each other in three-dimensional space, while the traditional FP air gap etalon can only adjust the parallelism in a two-dimensional plane, it is impossible to adjust the parallelism precisely. The longer it is used, the worse its accuracy becomes, and the worse the experimental results become.

[0071] To address the aforementioned technical problems, in one embodiment, such as Figure 3 As shown, the first housing 210 and the second housing 220 are connected by a universal joint structure 600.

[0072] The universal joint structure 600 can provide multiple rotation center lines, allowing the first housing 210 and the second housing 220 to rotate relative to each other around multiple different rotation center lines. This improves the flexibility between the first housing 210 and the second housing 220 and avoids interference between them when adjusting the angle. The universal joint structure 600 can include various structures, such as at least one of a universal joint hinge, a universal ball joint, a universal joint, and an integrated horizontal and vertical adjustment stepper motor. The universal joint structure 600 can also employ an elastic structure, utilizing the elastic deformation of the elastic structure to allow the first housing 210 and the second housing 220 to deflect at different angles, thereby adjusting the angle between them. The elastic structure can include springs, connecting posts made of elastic materials, etc. The elastic material can include at least one of rubber, silicone, resin, etc.

[0073] Preferably, the surface of the universal joint structure 600 has an anti-slip component or a damping component. By providing the anti-slip component or damping component, the universal joint structure 600 can change the angle between the first housing 210 and the second housing 220 under the action of external force. After the external force is removed, the universal joint structure 600 can remain in a locked state, thereby improving the relative stability of the first housing 210 and the second housing 220 and preventing arbitrary deflection. For example, when the universal joint structure 600 adopts a universal ball joint, the universal joint structure 600 can include a ball joint and a spherical groove adapted to the ball joint. A damping structure is provided between the ball joint and the spherical groove. When it is necessary to adjust the parallelism in three-dimensional space, the relative direction of the first housing 210 and the second housing 220 can be adjusted to achieve the above function. When the adjustment is completed, the first housing 210 and the second housing 220 remain in a relatively static state.

[0074] The universal joint structure 600 has its own rotation center point, and the two interconnected parts of the universal joint structure 600 can rotate around the rotation center point. The intersection of the first rotation center line and the second rotation center line can coincide with the rotation center point of the universal joint structure 600. This avoids interference between the universal joint structure 600 and the first high-precision adjustment mechanism 310 or the second high-precision adjustment mechanism 320 when the second housing 220 rotates relative to the first housing 210, thereby improving the adjustment accuracy.

[0075] Due to factors such as machining accuracy, assembly error, and internal stress, after the first high-precision adjustment mechanism 310 or the second high-precision adjustment mechanism 320 is adjusted, some structures in the first high-precision adjustment mechanism 310 or the second high-precision adjustment mechanism 320 may spring back, thereby compromising the adjustment accuracy of the first high-precision adjustment mechanism 310 or the second high-precision adjustment mechanism 320.

[0076] In one embodiment, such as Figure 3 As shown, the first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320 have the same structure, both including: a self-locking adjustment component 311 and a transmission component 312.

[0077] The self-locking adjustment component 311 is used to drive the second housing 220 to rotate relative to the first housing 210. The self-locking component is used to ensure that when the adjustment action of the second reflector 120 stops, the second reflector 120 can be automatically kept in the adjustment position, and to ensure that the parallelism between the first reflector 110 and the second reflector 120 remains stable.

[0078] The self-locking adjustment component 311 has a self-locking function. After the first high-precision adjustment mechanism 310 or the second high-precision adjustment mechanism 320 is adjusted, the self-locking function of the self-locking adjustment component 311 can keep the first high-precision adjustment mechanism 310 or the second high-precision adjustment mechanism 320 fixed, thereby keeping the relative position accuracy and parallelism of the first reflector 110 and the second reflector 120 fixed, thus improving the adjustment accuracy. The self-locking adjustment component 311 can achieve the self-locking function in a variety of ways, such as by using friction or by using a snap-fit ​​structure.

[0079] The self-locking adjusting component 311 can adjust the screw, the axis of which is perpendicular to the side of the first housing 210 facing the second housing 220. The adjusting screw is threadedly connected to one of the first housing 210 and the second housing 220; the adjusting screw is relatively fixed to the other of the first housing 210 and the second housing 220 in the axial direction of the adjusting screw.

[0080] For example only, such as Figure 3 As shown, the adjusting screw is threadedly connected to the second housing 220, and the adjusting screw and the first housing 210 are kept relatively fixed in the axial direction of the adjusting screw.

[0081] The end of the adjusting screw facing the first housing 210 can extend into the first housing 210. The end of the adjusting screw away from the first housing 210 can extend into the second housing 220 and be threadedly connected to the second housing 220. The end of the adjusting screw near the first housing 210 can abut against the inner surface of the first housing 210.

[0082] Because the adjusting screw and the first housing 210 are kept relatively fixed along the adjusting screw's axial direction, the adjusting screw's freedom of movement along its axial direction is restricted. Under the constraint of the threaded connection between the adjusting screw and the second housing 220, when the adjusting screw rotates, it can drive the second housing 220 to move along its axial direction, thereby driving the second housing 220 to deflect and finely adjust its angle. The deflection direction of the second housing 220 is related to the rotation direction of the adjusting screw.

[0083] The adjusting screws corresponding to the first high-precision adjusting mechanism 310 and the second high-precision adjusting mechanism 320 can be diagonally distributed relative to the first reflector 110, and the two adjusting screws and the universal joint connection structure can be distributed at right angles, thereby further avoiding interference between the first high-precision adjusting mechanism 310 and the second high-precision adjusting mechanism 320.

[0084] By using the threaded connection between the adjusting screw and the first housing 210 or the second housing 220, the self-locking function of the adjusting screw can be realized, and the position of the adjusting screw can be kept fixed when the driving of the adjusting screw is stopped.

[0085] The adjusting screw can be subjected to tension or thrust to move it toward the second housing 220. This tension or thrust is used to eliminate the gap between the external thread of the adjusting screw and the internal thread of the first housing 210 or the second housing 220 caused by factors such as machining errors, wear, and assembly errors, so as to avoid the adjustment accuracy of the adjusting screw deteriorating due to the influence of the gap.

[0086] An elastic structure can be provided between the adjusting screw and the first housing 210 or between the adjusting screw and the second housing 220 to apply a pushing force to the adjusting screw. This elastic structure allows the adjusting screw to move towards the second housing 220. The elastic structure can include various types, such as at least one of a spring, a spring plate, or an elastic washer. The adjusting screw can be magnetically connected to at least a portion of the second housing 220, using magnetic attraction to apply a pulling force to the adjusting screw towards the second housing 220. For example, a permanent magnet can be provided in the portion of the second housing 220 that contacts the adjusting screw, and the adjusting screw can be made of a magnetic material.

[0087] The use of an adjusting screw threadedly connected to the first housing 210 also helps to control the adjustment accuracy when the second housing 220 rotates. For example, when the adjusting screw rotates outward one revolution, the adjusting screw moves outward by one pitch, and the second housing 220 rotates by a preset angle, which corresponds to the preset accuracy.

[0088] The transmission component 312 provides power to the self-locking adjustment component 311, enabling the self-locking adjustment component 311 to drive the second housing 220 to rotate relative to the first housing 210. The transmission component 312 can also drive the adjusting screw to rotate, thereby causing the adjusting screw to screw in or out.

[0089] The transmission component 312 includes a stepper motor (not shown) and a reducer that is connected between the stepper motor and the adjusting screw.

[0090] A stepper motor can be used to control the number of rotations of the output shaft, thereby controlling the number of rotations of the adjusting screw. The stepper motor can be mounted on the first housing 210 or the second housing 220, thus integrating it into the FP air gap datum.

[0091] A speed reducer is used to reduce speed by decreasing the rotational speed transmitted from the stepper motor to the adjusting screw according to a reduction ratio. The reduction ratio is a preset value, such as 20:1, 30:1, or other ratios, and its specific ratio can be set according to actual needs. Speed ​​reducers can include various types, such as at least one of gear reducers, worm gear reducers, etc.

[0092] By way of example only, the reducer may include a worm 3121 and a worm wheel 3122, with the worm wheel 3122 mounted on and coaxially connected to the adjusting screw. The worm 3121 and worm wheel 3122 engage in transmission. One end of the worm 3121 extends outward through the second housing 220. By utilizing the engagement of the worm 3121 and worm wheel 3122, the degree of freedom of movement of the adjusting screw along its axial direction can be restricted, thereby enabling the adjusting screw to drive the second housing 220 to deflect when it rotates.

[0093] like Figure 3 As shown, at least a portion of the worm gear 3121 is rotatably connected to the second housing 220. The second housing 220 restricts the degree of freedom of movement of the worm gear 3121, thereby improving the positional accuracy of the worm gear 3121 during rotation and ensuring adjustment accuracy.

[0094] At least a portion of the worm gear 3121 is threadedly connected to the second housing 220. This threaded connection between the worm gear 3121 and the second housing 220 provides a self-locking effect, preventing the worm gear 3121 from retracting under internal stress and thus reducing adjustment accuracy.

[0095] Along the axial direction of the worm 3121, the portion of the worm 3121 connected to the second housing 220 has a certain preset length, such as 3mm, 5mm or other values, so that the worm 3121 and the second housing 220 have a certain contact area, which can restrict a certain degree of rotational freedom of the worm 3121, for example, restricting the rotational freedom of the worm 3121 other than the degree of freedom of rotation around its own axis, thereby improving the positional accuracy of the worm 3121.

[0096] The second housing 220 can be designed as a quadrangular prism, and the axis of the worm 3121 can be perpendicular to one of the outer surfaces of the second housing 220, which facilitates the installation of the worm 3121 and helps to ensure the positional accuracy of the worm 3121.

[0097] When there is a large error in the parallelism between the first reflector 110 and the second reflector 120, the ring spectral lines obtained in the Zeeman effect experiment will be unclear. The first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320 can only fine-tune the parallelism between the first reflector 110 and the second reflector 120, which is complicated to operate and slow to adjust.

[0098] In one embodiment, such as Figure 2 As shown, the lateral locking mechanism 400 includes a plurality of first oblique holes 410 provided on the first housing 210 and a first locking member 420 detachably provided in the first oblique holes 410.

[0099] The first oblique hole 410 serves as a mounting base to accommodate the first locking component 420. Multiple first oblique holes 410 are arranged around the first reflector 110, and the first locking component 420 is kinetically connected to the first reflector 110. By applying thrust to the first reflector 110 from different directions using multiple first locking components 420, the axial position of the first reflector 110 can be restricted, thereby locking the first reflector 110.

[0100] The first oblique hole 410 is set at an angle relative to the axis of the first reflector 110.

[0101] Multiple first locking components 420 apply thrust to the first reflector 110 from different axial positions, which can limit the degree of freedom of movement of the first reflector 110, thereby keeping the position of the first reflector 110 fixed.

[0102] The first housing 210 and the first reflector 110 are fitted with a clearance, thereby creating a certain gap between them to allow for coarse adjustments to the position of the first reflector 110. The size of this gap is a preset value, such as 0.5mm, 1mm, or other values. The specific value is a preset value, but it can also be set according to actual needs.

[0103] An elastic structure may also be provided between the first reflector 110 and the housing, filling at least a portion of the gap. When the first reflector 110 deflects and / or shifts, it can compress the elastic structure, causing it to deform adaptively. This increases the effective supported area of ​​the first reflector 110, further improving its stability.

[0104] The elastic structure can be designed as a ring, or multiple elastic structures can be arranged in a ring and evenly distributed around the circumference of the first reflector 110. The elastic structure can be made of an elastic material, such as rubber or silicone, to avoid a rigid connection between the elastic structure and the first reflector 110, which would lead to a deterioration in the surface accuracy of the first reflector 110.

[0105] At least a portion of the first locking component 420 may be made of an elastic material, such as rubber or silicone, to prevent the first locking component 420 from forming a rigid connection with the first reflector 110, thereby causing a deterioration in the surface accuracy of the first reflector 110.

[0106] The first locking component 420 can be designed as a cone. The first locking component 420 is elastically connected to the first oblique hole 410. At least a portion of the first locking component 420 can be elastically compressed against the first oblique hole 410, thereby improving the connection strength between the first locking component 420 and the first oblique hole 410 and preventing the first locking component 420 from loosening from the first oblique hole 410. The first locking component 420 is provided with an axially oriented elongated groove, so that the compression deformation of the first locking component 420 has a certain reserved space.

[0107] The number of the first oblique holes 410 is a preset value, such as three, four, or other values. The specific value is a preset value and can be set according to actual needs and performance. Multiple first oblique holes 410 can be evenly distributed on the first reflector 110 to provide uniform support for the first reflector 110.

[0108] The first oblique hole 410 and the first locking component 420 can be connected in various ways, such as at least one of threaded connection, snap-fit, and expansion connection. This ensures the relative positional accuracy of the first oblique hole 410 and the first locking component 420, preventing the first locking component 420 from moving arbitrarily and causing the first reflector 110 to loosen. The lateral locking mechanism 400 may also include a plurality of second oblique holes 430 provided on the second housing 220 and a second locking component 440 slidably provided in the second oblique holes 430. The plurality of second oblique holes 430 are arranged around the second reflector 120, and the second locking component 440 is drively connected to the second reflector 120.

[0109] The second locking component 440 has the same structure as the first locking component 420 and is symmetrically distributed. For more information about the second locking component 440, please refer to the previous description of the first locking component 420.

[0110] Figure 4 This is a schematic diagram of the reverse action structure according to an embodiment of the present invention.

[0111] In one embodiment, such as Figure 4As shown, the reverse action structure 500 has an elastic member that applies pressure to the second housing 220, and the pressure direction of the elastic member is perpendicular to the side of the first housing 210 facing the second housing 220.

[0112] The elastic component may include at least one of various types, such as a spring, a spring sheet, etc. The elastic component may always remain in a compressed state, thereby enabling the elastic component to always exert a thrust on the second housing 220 that moves the second housing 220 away from the first housing 210.

[0113] The elastic member can be disposed between the first housing 210 and the second housing 220.

[0114] The reverse action structure 500 may further include a connecting post, one end of which is connected to the side of the second housing 220 facing the first housing 210. The other end of the connecting post may extend into the first housing 210 and be slidably connected to the first housing 210.

[0115] like Figure 4 As shown, the elastic component can be disposed within the second housing 220. The second housing 220 has a mounting hole 510 on the side opposite to the first housing 210. A screw 520 is disposed within the mounting hole 510. The threaded end of the screw 520 passes through the second housing 220 and extends into the first housing 210. The portion of the threaded end passing through the second housing 220 is slidably connected to the second housing 220, while the portion extending into the first housing 210 is threadedly connected to the first housing 210. The elastic component 530 is compressed within the mounting hole 510 by the screw 520.

[0116] This allows the elastic member 530 to apply a thrust to the second housing 220, causing the second housing 220 to move away from the first housing 210.

[0117] The connecting column can be clearance-fitted with the first housing 210, or the threaded end can be clearance-fitted with the second housing 220. This allows for a certain amount of space to be reserved for the rotation of the first housing 210 and the second housing 220 when they rotate relative to each other. The size of this gap is a preset value, such as 0.1mm, 0.2mm or other values. The specific value is a preset value and can be set according to actual needs.

[0118] The number of the reverse action structure 500 is a preset value, such as three, four or other values. Multiple reverse action structures 500 are evenly distributed in a ring around the first reflector 110, which helps to make the first housing 210 and the second housing 220 bear forces evenly.

[0119] Figure 5 This is a schematic flowchart of an adjustment and control method for an FP air gap etalon according to an embodiment of the present invention.

[0120] This invention provides an adjustment and control method for an FP air gap etalon, which is applied to the FP air gap etalon. The FP air gap etalon includes a high-precision adjustment mechanism and a lateral locking mechanism 400. The high-precision adjustment mechanism includes a first high-precision adjustment mechanism 310 and a second high-precision adjustment mechanism 320. For more details about the first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320, please refer to the relevant description above.

[0121] The FP air gap etalon may also include a control module, which is communicatively connected to at least a portion of the first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320. For example, the control module is communicatively connected to the stepper motors corresponding to the first high-precision adjustment mechanism 310 and the second high-precision adjustment mechanism 320, respectively.

[0122] The control module is used to collect, analyze, and process data, and to control other structures based on preset programs. For example, it can control the stepper motor and the electric actuator to perform at least one of the following functions: start, stop, or change working power. The control module can include various types, such as at least one of the following: controller, processor, or cloud server.

[0123] The control module can communicate with the imaging system to acquire the ring spectral lines generated by the imaging system. The control module can be a part of the imaging system.

[0124] The adjustment control method for the FP air gap etalon is executed by the control module. For example... Figure 5 As shown, the method includes the following steps.

[0125] Step 810: Obtain the original spectral lines of the original FP air gap etalon.

[0126] The system first acquires and analyzes the original spectral lines generated by the original FP air gap etalon. For example, the control module can acquire the original spectral lines generated by the imaging system after light passes through the original FP air gap etalon. The original spectral lines include multiple ring lines, which have different sharpness and / or concentricity depending on the parallelism between the first reflector 110 and the second reflector 120. For example, when the parallelism between the first reflector 110 and the second reflector 120 is less than the parallelism threshold, the original spectral lines have different sharpness, and sharpness is proportional to parallelism. When the parallelism between the first reflector 110 and the second reflector 120 is greater than the parallelism threshold, the original spectral lines are sharp, but different ring lines are not concentric, and the concentricity of different ring lines is proportional to parallelism. The parallelism threshold is a preset value, which is related to the size, material, and other factors of the first reflector 110 and the second reflector 120 themselves, and its specific value can be obtained from the manufacturer.

[0127] Step 820: Perform curve conversion processing on the original spectral lines to obtain the corresponding grayscale curve.

[0128] Curve conversion processing refers to processing the original spectral lines into grayscale and then obtaining a grayscale curve based on the grayscale spectral lines. The control module can perform grayscale processing on the original spectral lines using various algorithms, such as at least one of the following: weighted averaging, desaturation, psychophysical methods, or other grayscale algorithms.

[0129] A grayscale curve is a graph showing the relationship between different positions of an original spectral line and its corresponding grayscale value. The control module can generate a grayscale curve based on a grayscale spectral line. For example, the control module can identify a straight line that simultaneously passes through different circular lines, determine preset points on that line and their corresponding grayscale values, and generate a grayscale curve by using the relative position of the preset points with respect to the diameter as the abscissa and the grayscale value as the ordinate. The preset points can include at least one of the following: multiple equidistantly distributed points, intersections of the straight line and multiple circular lines, or randomly selected points.

[0130] Step 830: Obtain the curve features of the grayscale curve, and analyze whether the parallelism of the original FP air gap etalon is qualified based on the curve features.

[0131] Curve features refer to features related to grayscale curves. Curve features can include at least one of grayscale values, grayscale value distribution, and curve shape.

[0132] The control module can analyze whether the parallelism of the FP air gap etalon is qualified. For example, the control module can compare the curve feature with the standard feature of the standard grayscale curve and calculate the similarity between the curve feature and the standard feature. When the similarity is greater than or equal to the similarity threshold, the parallelism of the FP air gap etalon is judged to be qualified. Otherwise, it is unqualified. The similarity threshold is a preset value, such as 98%, 99%, 99.5% or other values, and its specific value can be set according to actual needs.

[0133] As an example only, the control module can compare the shape of a grayscale curve with the shape of a standard grayscale curve and calculate their similarity. The standard grayscale curve is a preset value that can be obtained from historical data.

[0134] Step 840: If the deviation is not satisfactory, determine the direction of the deviation and the corresponding amount of deviation based on the curve characteristics.

[0135] The deviation direction describes the direction in which the first reflector 110 and the second reflector 120 deviate from each other. For example, the deviation direction may include a deviation in a first direction and / or a deviation in a second direction. The first direction refers to the direction in which the first reflector 110 and the second reflector 120 rotate relative to a first rotation center line, and the second direction refers to the direction in which the first reflector 110 and the second reflector 120 rotate relative to a second rotation center line.

[0136] The control module can determine a first straight line parallel to the first rotation center line and a second straight line parallel to the second rotation center line, and determine a first grayscale curve and a second grayscale curve based on the first straight line and the second straight line, respectively.

[0137] When the first straight line passes through the center of multiple circular lines simultaneously, and the second straight line does not pass through the center of multiple circular lines simultaneously, the first reflector 110 and the second reflector 120 have no deviation in the first direction, and the first reflector 110 and the second reflector 120 have a deviation in the second direction.

[0138] When the first straight line does not pass through the center of multiple circular lines at the same time, and the second straight line passes through the center of multiple circular lines at the same time, the first reflector 110 and the second reflector 120 are deviated in the first direction, and the first reflector 110 and the second reflector 120 are not deviated in the second direction.

[0139] When neither the first straight line nor the second straight line simultaneously passes through the center of multiple circular lines, but the second straight line simultaneously passes through the center of multiple circular lines, the first reflector 110 and the second reflector 120 deviate in both the first and second directions. The deviation amount is used to describe the magnitude of the deviation between the first reflector 110 and the second reflector 120.

[0140] The control module can determine the deviation in various ways. For example, for the same circular line, the control module can determine the four intersection points of the circle and the first straight line, and determine the relative positions of the four intersection points and the first straight line based on the first grayscale curve. The four intersection points are divided into two groups and distributed on both sides of the center of the circular line. The control module can calculate the first distance between the first group of intersection points and the second distance between the second group of intersection points, and calculate the difference between the first distance and the second distance. Based on this difference, the deviation is calculated.

[0141] As an example only, the control module can calculate the product of the difference and the coefficient, and determine the deviation as the amount of deviation. The coefficient is a preset value, which can be obtained in various ways, such as preset according to actual needs or obtained from historical data.

[0142] As an example only, the control module can construct a first data table based on the differences, deviations, and their corresponding relationships in historical data. The control module can then determine the corresponding deviation by querying the first data table based on the differences.

[0143] Step 850: Based on the deviation direction and deviation amount, control the high-precision adjustment mechanism to perform the corresponding high-precision adjustment action.

[0144] The control module can adjust the corresponding high-precision adjustment mechanism based on the deviation direction. For example, when there is a deviation between the first reflector 110 and the second reflector 120 in the first direction, the control module can control the stepper motor corresponding to the first high-precision adjustment mechanism 310 to start, so as to adjust the first high-precision adjustment mechanism 310.

[0145] The control module can control the adjustment range of the high-precision adjustment mechanism based on the deviation. For example, when there is a 1° deviation between the first reflector 110 and the second reflector 120 in the first direction, the control module can control the stepper motor corresponding to the first high-precision adjustment mechanism 310 to start, causing the corresponding adjustment screw to rotate in or out by a corresponding distance, thereby causing the first reflector 110 and the second reflector 120 to rotate relative to each other by 1°. The correspondence between the deviation and the movement distance of the adjustment screw is a preset value, which can be set according to actual needs.

[0146] The adjustment and control method for the FP air gap etalon provided in this embodiment of the invention can automatically analyze whether there is a deviation between the first reflector 110 and the second reflector 120 after the relative positions of the first reflector 110 and the second reflector 120 are rotated by the control module according to the corresponding spectrum lines, and adjust the parallelism of the first reflector 110 and the second reflector 120 in real time and automatically based on the existing deviation, which can improve the accuracy and efficiency of adjustment and enhance the user experience.

[0147] The FP air gap etalon includes a fixed first reflector 110 and a movable second reflector 120. For more information on the first reflector 110 and the second reflector 120, please refer to the relevant descriptions above.

[0148] The control module determines the direction of deviation and the corresponding amount of deviation based on the curve characteristics, specifically including the following steps.

[0149] Obtain a standard grayscale curve and determine the standard features of the standard grayscale curve; obtain the feature deviation between the curve features and the standard features; perform spectral mapping on the feature deviation to obtain the spectral deviation; determine the deviation direction and corresponding deviation amount of the second reflector 120 relative to the first reflector 110 based on the spectral deviation.

[0150] Feature deviation is used to describe the difference between curve features and standard features. Examples of feature deviations include the deviation between corresponding vertices of two curves, the deviation between corresponding slopes of two curves, and the deviation between corresponding positions of two curves. A larger value indicates a greater difference between the curve features and the standard features.

[0151] After obtaining the above-mentioned characteristic deviations, spectral line mapping is performed, that is, the above deviations are restored to the spectral lines to determine the degree of offset between the actual acquired spectral lines and the standard spectral lines, such as the offset direction and offset amount, that is, to determine the spectral line deviation. At this time, the influence of the parallelism deviation between the two mirrors on the spectral line deviation is further reversed to determine the amount and direction of the deviation between the two mirrors.

[0152] In practical applications, due to improper operation, equipment damage, or excessive wear caused by prolonged use, the parallelism deviation of the two reflectors of the original FP air gap etalon may be large. If a precision adjustment method is used, it may result in poor adjustment time and low efficiency, failing to meet actual requirements.

[0153] The adjustment and control method for the FP air gap etalon also includes: obtaining the sharpness of the spectral lines before performing curve conversion processing; and determining whether the sharpness meets the preset sharpness requirements.

[0154] Sharpness describes the clarity of spectral lines. The control module can determine spectral line sharpness in various ways, such as calculating it using at least one of the sharpness algorithms: gradient function method, frequency domain analysis method, statistical characteristic method, etc. Sharpness can be a specific numerical value.

[0155] Preset sharpness requirements can include ensuring that the sharpness of spectral lines is greater than or equal to a sharpness threshold. The sharpness threshold is a preset value and can be set according to actual needs.

[0156] If the preset sharpness requirement is not met, it indicates that the parallelism of the two mirrors is poor. A coarse adjustment can be performed first, followed by a fine adjustment to improve efficiency. Specifically, the control module determines the sharpness adjustment parameters based on the required sharpness.

[0157] The clear adjustment parameters are those used by the high-precision adjustment mechanism to adjust the first reflector 110 and / or the second reflector 120. The clear adjustment parameters may include the number of rotations of the stepper motor output shaft corresponding to the high-precision adjustment mechanism.

[0158] Sharpness adjustment parameters can be obtained in various ways, such as setting them based on experience or retrieving them from historical data. Alternatively, the control module can construct a second data table based on the sharpness, sharpness adjustment parameters, and their corresponding relationships from historical data. The control module can then determine the sharpness adjustment parameters by querying this second data table based on the sharpness.

[0159] The control module controls the stepper motors corresponding to the first high-precision adjustment mechanism 310 and / or the second high-precision adjustment mechanism 320 based on clear adjustment parameters to adjust the parallelism of the first reflector 110 and the second reflector 120. For example, the control module can determine the rotation parameters of the stepper motors corresponding to the first high-precision adjustment mechanism 310 and / or the second high-precision adjustment mechanism 320 according to the clear adjustment parameters, and then control the stepper motors to execute rotation commands to drive the second housing 220 to rotate relative to the first housing 210, thereby adjusting the parallelism of the first reflector 110 and the second reflector 120.

[0160] The adjustment and control method for the FP air gap etalon provided in the embodiments of this specification uses a control module to control different stepper motors to initially adjust the parallelism of the first reflector 110 and the second reflector 120, so that the clarity of the spectral lines meets the requirements, which can improve the accuracy and efficiency of adjustment, thereby improving the user experience.

[0161] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0162] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0163] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0164] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. An FP air gap etalon, characterized in that, The FP air gap etalon includes: A first reflector is fixedly installed in the first housing, and a second reflector is fixedly installed in the second housing. The second housing is movably connected to the first housing through a movable connection structure. A first high-precision adjustment mechanism and a second high-precision adjustment mechanism are provided on the first housing. The first high-precision adjustment mechanism is arranged along the first axis of the movable connection structure and is used to adjust the first parallelism between the first reflector and the second reflector from a first spatial dimension. The second high-precision adjustment mechanism is arranged along the second axis of the movable connection structure and is used to adjust the second parallelism between the first reflector and the second reflector from the second spatial dimension. The first spatial dimension and the second spatial dimension are different spatial dimensions. The first high-precision adjustment mechanism and the second high-precision adjustment mechanism form an interference-free adjustment structure through the movable connection structure, the first axis and the second axis. The adjustment accuracy of the first high-precision adjustment mechanism and the second high-precision adjustment mechanism is less than or equal to 1µm; A lateral locking mechanism is provided on the first housing and / or the second housing, the lateral locking mechanism is in contact with the first reflector and / or the second housing, and the lateral locking mechanism is used to apply a lateral locking force to the first reflector and / or the second housing; Multiple counteracting structures are evenly arranged on the second housing and distributed around the second reflector. One end of each counteracting structure is fixed to the first housing, and the other end is connected to the second housing. The counteracting mechanism is used to apply a force to the second housing that is opposite to that of the first high-precision adjustment mechanism and the second high-precision adjustment mechanism.

2. The FP air gap etalon according to claim 1, characterized in that, The movable connection structure is a universal connection structure, and the universal connection structure has anti-slip components or damping components.

3. The FP air gap etalon according to claim 1, characterized in that, The first high-precision adjustment mechanism and the second high-precision adjustment mechanism have the same structure, both including: a self-locking adjustment component and a transmission component. The self-locking component is used to ensure that when the adjustment action of the second reflector stops, the second reflector can be automatically kept in the adjustment position, ensuring that the parallelism between the first reflector and the second reflector remains stable.

4. The FP air gap etalon according to claim 3, characterized in that, The self-locking adjustment component includes an adjustment screw, the axis of which is perpendicular to the side of the first housing facing the second housing; The adjusting screw is threadedly connected to one of the first housing and the second housing; the adjusting screw and the other of the first housing and the second housing are kept relatively fixed in the axial direction of the adjusting screw.

5. The FP air gap etalon according to claim 3, characterized in that, The transmission component includes a stepper motor and a reducer that is connected between the stepper motor and the adjusting screw.

6. The FP air gap etalon according to claim 4, characterized in that, The lateral locking mechanism includes a plurality of first oblique holes disposed on the first housing and a first locking component slidably disposed within the first oblique holes; the plurality of first oblique holes are arranged around the first reflector, and the first locking component is kinetically connected to the first reflector; and / or The lateral locking mechanism includes a plurality of second oblique holes provided on the second housing and a second locking component slidably provided in the second oblique holes; the plurality of second oblique holes are arranged around the second reflector, and the second locking component is drivenly connected to the second reflector.

7. The FP air gap etalon according to claim 4, characterized in that, The reverse action structure has an elastic member that applies a tensile force to the second housing, the direction of which is perpendicular to the side of the first housing facing the second housing.

8. A method for adjusting and controlling an FP air gap etalon, characterized in that, The method is applied to the FP air gap etalon according to any one of claims 1-7, the FP air gap etalon comprising a high-precision adjustment mechanism and a lateral locking mechanism, the method comprising: Obtain the original spectral lines of the original FP air gap etalon; The original spectral lines are subjected to curve conversion processing to obtain the corresponding grayscale curves; Obtain the curve features of the grayscale curve, and analyze whether the parallelism of the original FP air gap etalon is qualified based on the curve features; If the result is unqualified, the deviation direction and the corresponding deviation amount are determined based on the curve characteristics. Based on the deviation direction and the deviation amount, the high-precision adjustment mechanism is controlled to perform corresponding high-precision adjustment actions.

9. The method according to claim 8, characterized in that, The FP air gap etalon includes a fixed first reflector and a movable second reflector. Determining the deviation direction and corresponding deviation amount based on the curve characteristics includes: Obtain a standard grayscale curve and determine the standard features of the standard grayscale curve; Obtain the feature deviation between the curve feature and the standard feature; Perform spectral line mapping on the characteristic deviation to obtain the spectral line deviation; The deviation direction and corresponding deviation amount of the second reflecting mirror relative to the first reflecting mirror are determined based on the spectral deviation.

10. The method according to claim 8, characterized in that, The method further includes: Before performing curve conversion processing on the spectral lines, the clarity of the spectral lines is obtained; Determine whether the resolution meets the preset resolution requirements; If the preset sharpness requirement is not met, a sharpness adjustment parameter is determined based on the sharpness. The parallelism of the first and second reflectors is adjusted based on the aforementioned clear adjustment parameters.

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