Optical filter switching device

Abstract

The invention provides an optical filter switching device which comprises the components of a fan-shaped rotating disc which is provided with two optical filter placing areas, and two groups of optical filters are fixed in the fan-shaped rotating disc through threaded pressing rings; one end of the piezoelectric driving assembly is in contact with the fan-shaped rotating disc, and the piezoelectric driving assembly is used for generating a tangential component force on the fan-shaped rotating disc through a contact point so as to excite the fan-shaped rotating disc to rotate; the rotary switching assembly is rotationally connected with the fan-shaped rotary disc through a rotary shaft, and the rotary shaft can rotate along with the fan-shaped rotary disc; and the limiting assembly is used for limiting the fan-shaped rotating disc. According to the invention, the problem of optical filter switching in the field of laser communication is solved, the fan-shaped slewing mechanism is adopted to reduce the space required for installing double optical filters, the piezoelectric actuation mode is adopted to reduce the size and weight of the switching device, and the working stability of the switching device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser communication, in particular to a filter switching device. BACKGROUND

[0002] In recent years, with the development of the technical field of laser communication, the demand for various high-precision and high-stability optical components is increasingly urgent. Among them, the filter switching mechanism can complete the switching of the filter as needed to adapt to different communication tasks and variable communication environments, and plays an important role in improving the stability and anti-interference ability of the laser communication system.

[0003] In the related art, the filter switching mechanism usually uses a motor combined with a gear for linear driving to realize real-time switching of two or more filters. The switching mechanism based on motor driving is large in size and weight, and the switching stability and reliability are affected by the driving mechanism, which is prone to switching jamming. SUMMARY

[0004] The present application provides a filter switching device to solve the above technical problems.

[0005] The technical scheme adopted by the present application is as follows:

[0006] The embodiment of the present application proposes a filter switching device, which comprises: a fan-shaped turntable, two filter placement areas are provided on the fan-shaped turntable, and two groups of filters are fixed to the fan-shaped turntable through threaded compression rings; a piezoelectric driving assembly, one end of the piezoelectric driving assembly is in contact with the fan-shaped turntable, and the piezoelectric driving assembly is used to generate a tangential component force on the fan-shaped turntable through a contact point to excite the fan-shaped turntable to rotate; a rotary switching assembly, the rotary switching assembly is rotatably connected to the fan-shaped turntable through a rotating shaft, and the rotating shaft can rotate with the fan-shaped turntable; a limiting assembly, the limiting assembly is used to limit the fan-shaped turntable.

[0007] The filter switching device proposed in the above embodiment of the present application also has the following additional technical features:

[0008] According to one embodiment of the present application, the piezoelectric driving assembly comprises: a rhombic pre-tightening; a ceramic disc, which is bonded to the end of the rhombic pre-tightening as a contact point with the fan-shaped turntable; a pre-tightening spring, one end of which is connected to the rhombic pre-tightening; a tight screw, one end of which is connected to the other end of the pre-tightening spring, and the tight screw is connected to the driving shell by threads, and is used to apply a centripetal force to the ceramic disc to make the ceramic disc tightly adhere to the fan-shaped turntable; a piezoelectric ceramic, which is tightly installed in the rhombic structure of the rhombic pre-tightening, and the maximum plastic deformation of the rhombic structure is greater than the electrostriction amount generated by the piezoelectric ceramic.

[0009] According to one embodiment of the present application, the rotating switching assembly comprises a fastening nut, a rotating shaft, two bearing spacer rings, two full ceramic bearings, two threaded pressure rings and a triangular mounting seat, wherein the sector-shaped rotating disc is connected with the triangular mounting seat by using the rotating shaft and the fastening nut, and one bearing spacer ring and one full ceramic bearing are arranged before and after the rotating shaft respectively, so that the rotating shaft can rotate together with the sector-shaped rotating disc.

[0010] According to one embodiment of the present application, the limiting assembly comprises two limiting protrusions arranged at opposite corners of the sector-shaped rotating disc respectively, and the limiting of the sector-shaped rotating disc is completed by the contact between the limiting protrusions and the triangular mounting frame.

[0011] According to one embodiment of the present application, the filter switching device further comprises a feedback assembly, the feedback assembly comprises two insulating terminals and two wire terminal mounting holes, the inner holes of the insulating terminals are arranged to mount wires, the contact surfaces of the limiting protrusions and the triangular mounting frame are electrically conductive, when the filter is switched to the position, the contact parts of the limiting protrusions are embedded in the inner holes of the insulating terminals, and the contact parts of the limiting protrusions constitute a communication branch, the wire terminal mounting holes are arranged to construct a closed branch when the filter is switched to the position, and the feedback when the filter is switched to the position is realized.

[0012] The present application has the following beneficial effects:

[0013] The present application solves the problem of filter switching in the field of laser communication, reduces the space required for installing double filters by using a sector-shaped rotating mechanism, reduces the size and weight of the switching device by using a piezoelectric actuation mode, and improves the stability of the switching device.

[0014] The present application realizes the feedback function when the filter is switched to the position by using the feedback assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the filter switching device according to one embodiment of the present application; Figure 2 is a sectional view of the filter switching device according to one embodiment of the present application; Figure 3 is a perspective view of the filter switching device according to one embodiment of the present application.

[0018] Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 2 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 3 is a perspective view of the filter switching device according to one embodiment of the present application; Fig. 4 is a sectional view of the filter switching device according to one embodiment of the present application; Fig. 5 is a perspective view of the filter switching device according to one embodiment of the present application; and Fig. 6 is a sectional view of the filter switching device according to one embodiment of the present application. Fig. 1 is a perspective view of the filter switching device according to one embodiment of the present application Detailed Implementation

[0019] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The filter switching device proposed in the embodiments of the present invention is described below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, the filter switching device of the present invention includes: a fan-shaped turntable 1, a piezoelectric drive assembly 2, a rotation switching assembly 3, and a limiting assembly 4.

[0022] The fan-shaped turntable 1 has two filter placement areas A1 and A2, and the two sets of filters are fixed to the fan-shaped turntable 1 by threaded clamps; one end of the piezoelectric drive assembly 2 is in contact with the fan-shaped turntable 2, and the piezoelectric drive assembly 2 is used to generate a tangential force on the fan-shaped turntable 1 through the contact point to excite the fan-shaped turntable 1 to rotate; the rotation switching assembly 3 is rotatably connected to the fan-shaped turntable 1 through a rotating shaft, and the rotating shaft can rotate together with the fan-shaped turntable 1; the limiting assembly 4 is used to limit the fan-shaped turntable 1.

[0023] Specifically, the piezoelectric drive component 2 generates a tangential force on the sector-shaped turntable 1 to induce it to rotate. The rotating shaft rotates along with the sector-shaped turntable 1. After rotating to the correct position, the limiting component 4 limits the sector-shaped turntable 1, thereby enabling the switching of the two filters. This solves the filter switching problem in the field of laser communication. The sector-shaped rotation mechanism reduces the space required for installing dual filters, and the piezoelectric actuation method reduces the size and weight of the switching device while improving its operational stability.

[0024] In one embodiment of the present invention, such as Figure 1 As shown, the piezoelectric drive assembly 2 includes: a rhomboid preload 21, a ceramic disc 22, a preload spring 23, a set screw 24, and a piezoelectric ceramic 25.

[0025] The ceramic disc 22 is bonded to the end of the rhombic pre-tightening 21 as a contact point with the fan-shaped rotating disc 1, one end of the pre-tightening spring 23 is connected to the rhombic pre-tightening 21, and the other end of the pre-tightening spring 23 is connected to the tight screw 24, which is screwed to the driving shell 26, so as to apply a centripetal force to the ceramic disc 22, so that the ceramic disc 22 is tightly attached to the fan-shaped rotating disc 1, and the piezoelectric ceramic 22 is tightly installed in the rhombic structure of the rhombic pre-tightening 21, and the maximum plastic deformation of the rhombic structure is greater than the electrostriction generated by the piezoelectric ceramic 22.

[0026] Specifically, as shown in the figure, Figure 1 the ceramic disc 22 is bonded to the end of the rhombic pre-tightening 21 as a contact point with the fan-shaped rotating disc 1, the two ends of the pre-tightening spring 23 are respectively connected to the tight screw 24 and the rhombic pre-tightening 21, the tight screw 24 is screwed to the driving shell 26, a centripetal force is applied to the ceramic disc 21, so that it is tightly attached to the fan-shaped rotating disc 1, and the piezoelectric ceramic 25 is tightly installed in the rhombic structure of the rhombic pre-tightening 21, and the maximum plastic deformation of the rhombic structure is greater than the electrostriction generated by the piezoelectric ceramic 22, so that the ceramic disc 22 fixed at the end of the rhombic pre-tightening has a displacement in the same direction as the piezoelectric ceramic 22, and then under the action of friction, a tangential component is generated on the fan-shaped rotating disc 1, which excites the fan-shaped rotating disc 1 to rotate.

[0027] In an embodiment of the present application, as shown in the figure, Figure 2 the rotating switching assembly 3 comprises a fastening nut 31, a rotating shaft 32, two bearing spacer rings 33, two all-ceramic bearings 34, two threaded pressure rings 35 and a triangular mounting seat 36.

[0028] The fan-shaped rotating disc 1 is connected with the triangular mounting seat 36 by the rotating shaft 32 and the fastening nut 31, and one bearing spacer ring 33 and one all-ceramic bearing 34 are installed before and after the rotating shaft 32, so that the rotating shaft 32 can rotate with the fan-shaped rotating disc 1. It can be understood that the triangular mounting seat 36 has a hollow part with the same size as the filter placement area, so as to avoid blocking the filter when the filter is switched.

[0029] In an embodiment of the present application, as shown in the figure, Figure 3 the limiting assembly 4 comprises a limiting protrusion 41, the limiting protrusion 41 comprises two, which are respectively arranged at opposite two places of the fan-shaped rotating disc 1, and the limiting of the fan-shaped rotating disc 1 is completed by the contact between the limiting protrusion 41 and the triangular mounting frame 36.

[0030] In an embodiment of the present application, as shown in the figure, Figure 3As shown, the filter switching device further comprises a feedback assembly, the feedback assembly comprises two insulating terminals 42 and two wire terminal mounting holes 43, the inner hole of the insulating terminal is mounted with a wire, the contact surface of the limiting protrusion 41 and the triangular mounting frame 36 is conductive, when the filter is switched to the position, the contact part of the limiting protrusion 41 is embedded in the inner hole of the insulating terminal 42, and a communication branch is formed, a closed branch when the filter is switched to the position is constructed through the wire terminal mounting hole 43, and the feedback when the filter is switched to the position is realized.

[0031] Specifically, there is one limiting protrusion 41 at each of the opposite corners of the fan-shaped rotating disc 1, and the limiting is completed by the contact of the limiting protrusion 41 and the triangular mounting frame 36.

[0032] The contact surface of the limiting protrusion 41 and the triangular mounting frame 36 is conductive, and when the contact part is embedded in the insulating terminal 42 of the inner hole of the inserted wire, a communication branch is formed when the filter is switched to the position, and a closed branch when the filter is switched to the position is constructed through the two wire terminal mounting holes 43, and the feedback when the filter is switched to the position is realized.

[0033] In summary, according to the filter switching device of the embodiment of the present application, the problem of filter switching in the field of laser communication is solved, the space required for installing double filters is reduced by using a fan-shaped rotating mechanism, the size and weight of the switching device are reduced by using a piezoelectric actuation mode, and the stability of the switching device is improved. And the filter switching to the position feedback function is realized by the feedback assembly.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An optical filter switching device, characterized by comprising: The utility model relates to a filter switching device, comprising: a fan-shaped rotating disc provided with two filter placement areas, and two groups of filters are fixed to the fan-shaped rotating disc through threaded compression rings; a piezoelectric driving assembly, one end of which is in contact with the fan-shaped rotating disc, and the piezoelectric driving assembly is used to generate a tangential component on the fan-shaped rotating disc through the contact point to excite the rotation of the fan-shaped rotating disc; a rotary switching assembly, which is rotatably connected to the fan-shaped rotating disc through a rotating shaft, and the rotating shaft can rotate with the fan-shaped rotating disc; a limiting assembly, which is used to limit the fan-shaped rotating disc.

2. The filter switching device according to claim 1, characterized in that, The piezoelectric driving assembly comprises: a rhombic pre-tightening; a ceramic disc, which is bonded to the rhombic pre-tightening end, as the contact point with the fan-shaped rotating disc; a pre-tightening spring, one end of which is connected to the rhombic pre-tightening; a set screw, one end of which is connected to the other end of the pre-tightening spring, and the set screw is screwed onto the driving shell, used to apply a centripetal force to the ceramic disc to make it tightly adhere to the fan-shaped rotating disc; a piezoelectric ceramic, which is tightly installed in the rhombic structure of the rhombic pre-tightening, and the maximum plastic deformation of the rhombic structure is greater than the electrostriction generated by the piezoelectric ceramic.

3. The filter switching device according to claim 1, characterized in that, The rotary switching assembly comprises a fastening nut, a rotating shaft, two bearing spacers, two all-ceramic bearings, two threaded compression rings and a triangular mounting seat, wherein, the fan-shaped rotating disc and the triangular mounting seat are connected using the rotating shaft and the fastening nut, and one bearing spacer and all-ceramic bearing are installed before and after the rotating shaft, so that the rotating shaft can rotate with the fan-shaped rotating disc.

4. The filter switching device according to claim 3, characterized in that The limiting assembly comprises: two limiting protrusions, which are respectively arranged at opposite corners of the fan-shaped rotating disc, and the limiting of the fan-shaped rotating disc is completed by the contact between the limiting protrusions and the triangular mounting frame.

5. The filter switching device according to claim 4, characterized in that It also comprises: a feedback assembly, which comprises two insulating terminals and two wire terminal mounting holes, the inner holes of the insulating terminals are used to mount wires, the contact surface of the limiting protrusion and the triangular mounting frame is conductive, when the filters are switched to the position, the contact part of the limiting protrusion is embedded in the inner hole of the insulating terminal, forming a connected branch, and through the wire terminal mounting hole, a closed branch when the filters are switched to the position is constructed, realizing the feedback when the filters are switched to the position.

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