Lissajous optical fiber scanner with combined cylindrical body
By adjusting the shape and size parameters of the upper side plate of the combined cylindrical body, the vibration coupling problem of the Lissajous scanner was solved, achieving efficient scanning effect and improved yield.
Patent Information
- Application Number
- CN202423313392.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-30
AI Technical Summary
When the natural frequencies used by a Lissajous scanner in two directions are close, vibration coupling effects are likely to occur, leading to distortion of the scanning trajectory and making it difficult to guarantee processing accuracy and yield.
Design a Lissajous fiber optic scanner with a combined cylindrical body. By adjusting the shape and size parameters of the upper side plate, the natural frequencies of the combined part in the horizontal and vertical directions meet specific difference requirements, avoiding vibration coupling and reducing the processing difficulty and accuracy requirements.
It achieves a uniform and dense scanning grid in two directions, reducing the processing difficulty and accuracy requirements, and improving the yield and processing efficiency.
Smart Images
Figure CN223742866U_ABST
Abstract
Description
[0001] This application is a divisional application of the Chinese patent application No. 2024232650163, filed on December 30, 2024, with the State Intellectual Property Office of China, and entitled "Lissajous Fiber Scanner with Combined Cylinder Body", the whole content of which is incorporated herein by reference. TECHNICAL FIELD
[0002] The present application relates to the technical field of fiber scanner structure, in particular to a Lissajous fiber scanner with a combined cylinder body. BACKGROUND
[0003] The fiber scanner is a display technology that uses a scanning driver to control the swing of a fiber while the fiber emits light. It is mainly used in the technical fields of fiber scanning display technology, fiber scanning endoscope technology, fiber scanning radar, etc. When the fiber scanner is applied to image display, the color of the pattern illuminated by this technology is sharp and saturated, the contrast is high, the brightness is high, and the structure is very small.
[0004] The fiber scanner uses the principle of mechanical resonance to make the fiber cantilever achieve a large scanning range. The scanning mode of the scanning driver can be divided into spiral scanning, grid scanning and Lissajous scanning. The micro piezoelectric scanning device of Lissajous scanning generally has two driving parts, which drive the scanning device to vibrate in two directions at the same time. The closer the driving frequencies of the two directions in Lissajous scanning, the closer the uniformity (density) of the scanning grid in the two directions, and theoretically the closer the driving frequencies of the two directions, the better. However, the closer the inherent frequencies used in the two directions of the scanner, the more obvious the vibration coupling effect will be, which will worsen the scanning trajectory, cause uncontrolled components in the scanning trajectory, and cause distortion in the scanning image, which is difficult to completely eliminate through post-processing. Therefore, the inherent frequencies used in the two directions of the Lissajous scanner should have a precise difference range, neither too small to cause coupling effect, nor too large to cause non-uniformity.
[0005] and the Lissajous scanner with the inherent frequencies in the two directions having a precise difference is difficult to manufacture,
[0006] which requires extremely high processing precision, and neither the cost of processing equipment nor the yield can be guaranteed. CONTENT OF THE INVENTION
[0007] The present application provides a Lissajous fiber scanner with a combined cylinder body to reduce the processing difficulty and improve the processing yield.
[0008] In order to achieve the above-mentioned application purposes, the application provides a Lissajous fiber scanner with a combined barrel body, which comprises a barrel body and a fiber, the axial extension direction of the barrel body is the front-rear direction, the rear end of the barrel body is fixedly connected with a base to be supported by the base,
[0009] The barrel body comprises support columns arranged at four corners and four side plates connecting any two adjacent support columns, the length of the upper side plate in the front-rear direction is longer than that of the other three side plates,
[0010] The rear half of the upper side plate is surrounded by the four support columns and the other three side plates to form a barrel coincident part, and the fiber is fixedly arranged at the front end of the upper side plate in a cantilever support manner,
[0011] At least one of the inner surface and the outer surface of the left and right sides of the barrel coincident part is provided with a first inner electrode and a first outer electrode matched and arranged correspondingly, the part of the barrel coincident part between the first inner electrode and the corresponding first outer electrode is a piezoelectric material part polarized in the thickness direction, the piezoelectric material part between the first inner electrode and the corresponding first outer electrode is driven to stretch and contract in the front-rear direction by the first inner electrode and the corresponding first outer electrode, and the front end of the barrel body is driven to vibrate left and right in the horizontal direction,
[0012] At least one of the inner surface and the outer surface of the upper and lower sides of the barrel coincident part is provided with a second inner electrode and a second outer electrode matched and arranged correspondingly, the part of the barrel coincident part between the second inner electrode and the second outer electrode is a piezoelectric material part polarized in the thickness direction, the piezoelectric material part between the second inner electrode and the second outer electrode is driven to stretch and contract in the front-rear direction by the second inner electrode and the second outer electrode, and the front end of the barrel body is driven to vibrate in the vertical direction,
[0013] The upper side plate makes the inherent frequency of the combined part of the barrel body and the fiber in the horizontal direction greater than the same order inherent frequency of the combined part in the vertical direction, and makes the combined part have a difference between the certain order inherent frequency closest to the V order inherent frequency in the horizontal direction and the V order inherent frequency in the vertical direction, and V is an integer greater than or equal to 1.
[0014] The combination part has a first natural frequency, a second natural frequency, a third natural frequency, and an Nth natural frequency in the vertical direction, wherein the natural frequency of a certain order (for example, Uth, U is an integer greater than or equal to 2) is closest to the Vth natural frequency of the combination part in the horizontal direction (V is less than U), the closer the driving frequencies of the two directions in the Lissajous scan are, the closer the uniformity (density) of the scan grid in the two directions is, and the more the number of points is, and theoretically the closer the driving frequencies of the two directions are, but the closer the natural frequencies of the combination part used in the two directions are, the more obvious the coupling effect is, and therefore the application adjusts the shape and / or size parameters of the upper side plate to make the natural frequencies of the combination part used in the two directions meet the requirements of Lissajous scanning conditions, that is, the natural frequencies of the combination part used in the two directions are close enough to ensure good scanning effect and have a uniform and dense scan grid, and at the same time have a sufficient difference to prevent the vibration of the combination part in the two directions from being coupled.
[0015] Therefore, the application adjusts the shape and / or size parameters of the upper side plate to make the vibration frequencies of the combination part in the two directions meet the requirements of Lissajous scanning conditions, which reduces the requirements for the machining size and precision of the cylindrical body, makes the machining difficulty of the cylindrical body low, the machining error easy to control, and the yield high.
[0016] In the embodiment, the Vth order is the first order and the Uth order is the second order. Of course, this is only the parameter selection of the embodiment, and in other embodiments of similar structure types, V can also be selected as an integer greater than 1, and U can be selected as an integer greater than V.
[0017] The difference satisfies that when the combination part is driven by the driving signal to perform Lissajous scanning, the vibration of the combination part in the horizontal direction and the vibration of the combination part in the vertical direction will not be coupled.
[0018] Generally, the difference is in the range of 10 Hz to 12 KHz. Further preferably, the difference is in the range of 1 KHz to 10 KHz. The value of the Vth natural frequency of the scanner cantilever in the horizontal direction is selected according to the selected scanner cantilever, as long as the scanner cantilever has sufficient amplitude when the piezoelectric actuator is driven to perform Lissajous scanning, and the vibration of the scanner cantilever in the horizontal direction and the vibration of the scanner cantilever in the vertical direction will not be coupled. For those skilled in the art, numerical selection according to the above description is a conventional technical means in the art.
[0019] Optionally, the inner surface and the outer surface of any one side of the left and right sides of the cylindrical coincident part are respectively provided with a first inner electrode and a first outer electrode arranged correspondingly, the part of the cylindrical coincident part between the first inner electrode and the corresponding first outer electrode is a piezoelectric material part polarized along the thickness direction, the piezoelectric material part between the first inner electrode and the corresponding first outer electrode is driven to stretch and contract along the front-back direction by the first inner electrode and the corresponding first outer electrode, and the front end of the cylindrical coincident part is driven to vibrate left and right along the horizontal direction. The number of the first inner electrode or the first outer electrode can be one, two or more.
[0020] Optionally, the inner surface and the outer surface of the left and right sides of the cylindrical coincident part are respectively provided with a first inner electrode and a first outer electrode arranged correspondingly, the part of the cylindrical coincident part between the first inner electrode and the corresponding first outer electrode is a piezoelectric material part polarized along the thickness direction, the piezoelectric material part between the first inner electrode and the corresponding first outer electrode is driven to stretch and contract along the front-back direction by the first inner electrode and the corresponding first outer electrode, and the piezoelectric material parts on the left and right sides are synchronously and reversely stretched and contracted with the same length, and the front end of the cylindrical coincident part is driven to vibrate left and right along the horizontal direction. The number of the first inner electrode or the first outer electrode on the same side can be one, two or more.
[0021] Optionally, the inner surface and the outer surface of any one side of the upper and lower sides of the cylindrical coincident part are respectively provided with a second inner electrode and a second outer electrode arranged correspondingly, the part of the piezoelectric material cylindrical body between the second inner electrode and the second outer electrode is a piezoelectric material part polarized along the thickness direction, the piezoelectric material part between the second inner electrode and the second outer electrode is driven to stretch and contract along the front-back direction by the second inner electrode and the second outer electrode, and the front end of the cylindrical coincident part is driven to vibrate up and down along the vertical direction. The number of the second inner electrode or the second outer electrode can be one, two or more.
[0022] Optionally, the inner surface and the outer surface of the upper and lower sides of the cylindrical coincident part are respectively provided with a second inner electrode and a second outer electrode arranged correspondingly, the part of the piezoelectric material cylindrical body between the second inner electrode and the second outer electrode is a piezoelectric material part polarized along the thickness direction, the piezoelectric material part between the second inner electrode and the second outer electrode is driven to stretch and contract along the front-back direction by the second inner electrode and the second outer electrode, and the piezoelectric material parts on the upper and lower sides are synchronously and reversely stretched and contracted with the same length, and the front end of the cylindrical coincident part is driven to vibrate up and down along the vertical direction. The number of the second inner electrode or the second outer electrode on the same side can be one, two or more.
[0023] Further preferably, when the inner surface and the outer surface on the left and right sides of the barrel type overlapping part are respectively provided with the first inner electrode and the first outer electrode corresponding thereto, the first inner electrodes on the left and right sides of the barrel type overlapping part are symmetrically arranged to drive the barrel type overlapping part to accurately vibrate left and right in the horizontal direction without generating a displacement component in the vertical direction; when the inner surface and the outer surface on the upper and lower sides of the barrel type overlapping part are respectively provided with the second inner electrode and the second outer electrode corresponding thereto, the second inner electrodes on the upper and lower sides of the barrel type overlapping part are symmetrically arranged to drive the barrel type overlapping part to accurately vibrate in the vertical direction without generating a displacement component in the horizontal direction.
[0024] The one or more technical solutions in the application have at least the following technical effects or advantages:
[0025] The application makes the piezoelectric actuating part of the Lissajous scanner itself not necessarily have a specific difference in the inherent frequency in the two driving directions, and also avoids coupling of vibration in the two driving directions, thereby reducing the processing difficulty and the requirement for processing precision. The application uses adjustment of the shape structure and / or size parameter of the upper side plate to make the vibration frequency of the combined part in the two directions meet the Lissajous scanning working condition requirement, thereby reducing the requirement for the processing size and precision of the barrel type body, making the barrel type body have low processing difficulty, the processing error easy to control, and high yield, and making the processing efficiency and yield significantly improved. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is a structural schematic view of the application;
[0027] Figure 2 It is Figure 1 It is a front structural schematic view of the barrel type body of the embodiment shown in the figure. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.
[0029] Embodiment:
[0030] Combined Figure 1 , Figure 2 As shown in the figure, a Lissajous optical fiber scanner with a combined barrel type body includes a barrel type body and an optical fiber 104,
[0031] The axial extension direction of the barrel type body is the front-rear direction, the rear end of the barrel type body is fixedly connected with the base 200 to be supported by the base 200,
[0032] The cylindrical body includes support columns 105 arranged at four corners and four side plates 106 connecting any two adjacent support columns 105, and an upper side plate 107 arranged at the upper side and having a length in the front-rear direction longer than the lengths of the other three side plates 106,
[0033] The rear half of the upper side plate 107 and the four support columns 105 and the other three side plates 106 form a cylindrical coincident portion, and the optical fiber 104 is fixedly arranged at the front end of the upper side plate 107 in a cantilevered support manner,
[0034] At least one of the inner surface and the outer surface of the left and right sides of the cylindrical coincident portion is provided with a first inner electrode 1011 and a first outer electrode 1012 arranged in corresponding cooperation, and the portion of the cylindrical coincident portion between the first inner electrode 1011 and the corresponding first outer electrode 1012 is a piezoelectric material portion polarized in the thickness direction, which is driven by the first inner electrode 1011 and the corresponding first outer electrode 1012 to stretch and contract in the front-rear direction, thereby driving the front end of the cylindrical body to vibrate left and right in the horizontal direction,
[0035] At least one of the inner surface and the outer surface of the upper and lower sides of the cylindrical coincident portion is provided with a second inner electrode 1021 and a second outer electrode 1022 arranged in corresponding cooperation, and the portion of the cylindrical coincident portion between the second inner electrode 1021 and the second outer electrode 1022 is a piezoelectric material portion polarized in the thickness direction, which is driven by the second inner electrode 1021 and the second outer electrode 1022 to stretch and contract in the front-rear direction, thereby driving the front end of the cylindrical body to vibrate in the vertical direction,
[0036] The upper side plate 107 causes the natural frequency of the combined portion of the cylindrical body and the optical fiber 104 in the horizontal direction to be greater than the same order natural frequency of the combined portion in the vertical direction, and causes the combined portion to have a difference between the certain order natural frequency closest to the V order natural frequency in the horizontal direction and the V order natural frequency in the vertical direction, V being an integer greater than or equal to 1.
[0037] The combination part has a first natural frequency, a second natural frequency, a third natural frequency, and an Nth natural frequency in the vertical direction, wherein the natural frequency of a certain order (for example, Uth order, U is an integer greater than or equal to 2) is closest to the Vth natural frequency of the combination part in the horizontal direction (V is less than U). The closer the driving frequencies in the two directions in the Lissajous scan are, the closer the uniformity (density) of the scan grid in the two directions is, and the more the number of points is. In theory, the closer the driving frequencies in the two directions are, the better. However, the closer the natural frequencies used by the combination part in the two directions are, the more obvious the coupling effect will be. Therefore, the application adjusts the shape and / or size parameters of the upper side plate 107 so that the natural frequencies of the combination part used in the two directions are close enough to ensure good scanning effect and have a uniform and dense scan grid, and at the same time have a sufficient difference so that the vibration of the combination part in the two directions does not produce coupling.
[0038] Therefore, the application adjusts the shape and / or size parameters of the upper side plate 107 to make the vibration frequencies of the combination part in the two directions meet the Lissajous scan working condition requirements, reduces the processing size and precision requirements of the cylindrical body, makes the processing difficulty of the cylindrical body low, the processing error easy to control, and the yield high.
[0039] In the embodiment, the Vth order is the first order, and the Uth order is the second order. Of course, this is only the parameter selection of the embodiment. In other embodiments of the similar structure type, V can also be selected as an integer greater than 1, and U is selected as an integer greater than V.
[0040] The difference satisfies that when the combination part is driven by the driving signal to perform Lissajous scanning, the vibration of the combination part in the horizontal direction and the vibration of the combination part in the vertical direction do not produce coupling.
[0041] Generally, the difference is in the range of 10 Hz to 12 KHz. Further preferably, the difference is in the range of 1 KHz to 10 KHz. The value of the Vth natural frequency of the scanner cantilever in the horizontal direction is selected according to the selected scanner cantilever. As long as the difference satisfies that the scanner cantilever has sufficient amplitude when the piezoelectric actuator is driven to perform Lissajous scanning, and the vibration of the scanner cantilever in the horizontal direction and the vibration of the scanner cantilever in the vertical direction do not produce coupling. For those skilled in the art, numerical selection according to the above description is a conventional technical means in the art.
[0042] Optionally, a first inner electrode 1011 and a first outer electrode 1012 are respectively provided on the inner and outer surfaces of either side of the cylindrical overlapping portion. The portion of the cylindrical overlapping portion between the first inner electrode 1011 and the corresponding first outer electrode 1012 is a piezoelectric material portion polarized along the thickness direction. The piezoelectric material portion located between the first inner electrode 1011 and the corresponding first outer electrode 1012 is driven to extend and retract in the front-back direction, driving the front end of the cylindrical overlapping portion to vibrate left and right in the horizontal direction. The number of first inner electrodes 1011 or first outer electrodes 1012 can be one, two, or more.
[0043] Alternatively, the inner and outer surfaces of both sides of the cylindrical overlapping portion are respectively provided with correspondingly fitted first inner electrodes 1011 and first outer electrodes 1012. The portion of the cylindrical overlapping portion between the first inner electrode 1011 and the corresponding first outer electrode 1012 is a piezoelectric material portion polarized along the thickness direction. The piezoelectric material portion located between the first inner electrode 1011 and the corresponding first outer electrode 1012 is driven to extend and retract in the front-back direction, while the piezoelectric material portions on the upper and lower sides extend and retract synchronously in opposite directions with equal length, driving the front end of the cylindrical overlapping portion to vibrate left and right in the horizontal direction. The number of first inner electrodes 1011 or first outer electrodes 1012 located on the same side can be one, two, or more.
[0044] Optionally, a second inner electrode 1021 and a second outer electrode 1022 are respectively provided on the inner and outer surfaces of either the upper or lower sides of the cylindrical overlapping portion. The portion of the piezoelectric material cylindrical body located between the second inner electrode 1021 and the second outer electrode 1022 is a piezoelectric material portion polarized along the thickness direction. The piezoelectric material portion located between the two is driven by the second inner electrode 1021 and the second outer electrode 1022 to extend and retract in the front-rear direction, driving the front end of the cylindrical overlapping portion to vibrate up and down in the vertical direction. The number of the second inner electrode 1021 or the second outer electrode 1022 can be one, two, or more.
[0045] Alternatively, the inner and outer surfaces of the upper and lower overlapping cylindrical portions are respectively provided with correspondingly fitted second inner electrodes 1021 and second outer electrodes 1022. The portion of the piezoelectric cylindrical body located between the second inner electrodes 1021 and the second outer electrodes 1022 is a piezoelectric material portion polarized along the thickness direction. The piezoelectric material portion located between the second inner electrodes 1021 and the second outer electrodes 1022 is driven to extend and retract in the front-back direction, while the piezoelectric material portions on the upper and lower sides extend and retract synchronously in opposite directions at the same length, driving the front end of the overlapping cylindrical portion to vibrate up and down in the vertical direction. The number of second inner electrodes 1021 or second outer electrodes 1022 located on the same side can be one, two, or more.
[0046] More preferably, when the inner and outer surfaces of the left and right sides of the cylindrical overlapping portion are respectively provided with a first inner electrode 1011 and a corresponding first outer electrode 1012, the first inner electrodes 1011 on the left and right sides of the cylindrical overlapping portion are symmetrically arranged to drive the cylindrical overlapping portion to vibrate accurately in the horizontal direction without generating a displacement component in the vertical direction; when the inner and outer surfaces of the upper and lower sides of the cylindrical overlapping portion are respectively provided with a second inner electrode 1021 and a corresponding second outer electrode 1022, the second inner electrodes 1021 on the upper and lower sides of the cylindrical overlapping portion are symmetrically arranged to drive the cylindrical overlapping portion to vibrate accurately in the vertical direction without generating a displacement component in the horizontal direction.
[0047] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The words “comprising” or “including” do not exclude the presence of elements or steps not listed in the claims. The words “a” or “an” preceding an element do not exclude the presence of a plurality of such elements. The use of the words first, second, and third, etc., does not indicate any order and these words can be interpreted as names.
[0048] All features disclosed in this specification, except for mutually exclusive features, can be combined in any way.
[0049] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0050] This application is not limited to the specific embodiments described above. This application extends to any new features or combinations disclosed in this specification, as well as any new steps or combinations of any new methods or processes disclosed.
Claims
1. A Lissajous fiber scanner having a combined barrel body, characterized by, The application relates to a cylinder type body and an optical fiber, the axis extension direction of the cylinder type body is the front-back direction, the rear end of the cylinder type body is fixedly connected with a base, and the cylinder type body is supported by the base, The cylinder type body comprises support columns arranged at four corners and four side plates connecting any two adjacent support columns, the length of the upper side plate in the front-back direction is longer than that of the other three side plates, The rear half of the upper side plate is surrounded by the four support columns and the other three side plates to form a cylinder type coincident part, the optical fiber is fixedly arranged at the front end of the upper side plate in a cantilever support mode, At least one of the inner surface and the outer surface of the left and right sides of the cylinder type coincident part is respectively provided with a first inner electrode and a first outer electrode arranged in correspondence, the part of the cylinder type coincident part between the first inner electrode and the corresponding first outer electrode is a piezoelectric material part polarized in the thickness direction, the piezoelectric material part between the first inner electrode and the corresponding first outer electrode is driven to stretch and contract in the front-back direction by the first inner electrode and the corresponding first outer electrode, and the front end of the cylinder type body is driven to vibrate left and right in the horizontal direction, At least one of the inner surface and the outer surface of the upper and lower sides of the cylinder type coincident part is respectively provided with a second inner electrode and a second outer electrode arranged in correspondence, the part of the cylinder type coincident part between the second inner electrode and the second outer electrode is a piezoelectric material part polarized in the thickness direction, the piezoelectric material part between the second inner electrode and the second outer electrode is driven to stretch and contract in the front-back direction by the second inner electrode and the second outer electrode, and the front end of the cylinder type body is driven to vibrate in the vertical direction, The upper side plate makes the inherent frequency of the combination part of the cylinder type body and the optical fiber in the horizontal direction greater than the same order inherent frequency of the combination part in the vertical direction, and makes the combination part in the vertical direction have a difference between a certain order inherent frequency close to the V order inherent frequency in the horizontal direction and the V order inherent frequency in the horizontal direction, V being an integer greater than or equal to 1.
2. A Lissajous fiber scanner with a combined barrel body as claimed in claim 1, characterized in that, The difference satisfies that, when the combination part is driven by a driving signal to make Lissajous scanning, the vibration of the combination part in the horizontal direction and the vibration in the vertical direction do not generate coupling.
3. A Lissajous fiber scanner with a combined barrel body as claimed in claim 1 or 2, characterized in that, The difference ranges from 10 Hz to 12 KHz.
4. A Lissajous fiber scanner with a combined barrel body as claimed in claim 1 or 2, characterized in that, The difference ranges from 1 KHz to 10 KHz.
5. A Lissajous fiber scanner with a combined barrel body as claimed in claim 1 or 2, characterized in that, The inner surface and the outer surface of any one of the left and right sides of the cylinder type coincident part are respectively provided with a first inner electrode and a first outer electrode arranged in correspondence, the part of the cylinder type coincident part between the first inner electrode and the corresponding first outer electrode is a piezoelectric material part polarized in the thickness direction, the piezoelectric material part between the first inner electrode and the corresponding first outer electrode is driven to stretch and contract in the front-back direction by the first inner electrode and the corresponding first outer electrode, and the front end of the cylinder type coincident part is driven to vibrate left and right in the horizontal direction.
6. A Lissajous fiber scanner with a combined barrel body as claimed in claim 1 or 2, characterized in that, The inner surface and the outer surface of the left and right sides of the cylinder type coincident part are respectively provided with a first inner electrode and a first outer electrode arranged in correspondence, the part of the cylinder type coincident part between the first inner electrode and the corresponding first outer electrode is a piezoelectric material part polarized in the thickness direction, the piezoelectric material part between the first inner electrode and the corresponding first outer electrode is driven to stretch and contract in the front-back direction by the first inner electrode and the corresponding first outer electrode, and the front end of the cylinder type coincident part is driven to vibrate left and right in the horizontal direction.
7. A Lissajous fiber scanner with a combined barrel body as claimed in claim 1 or 2, characterized in that, The inner surface and the outer surface of the left and right sides of the cylindrical overlapping part are respectively provided with the first inner electrode and the first outer electrode arranged correspondingly, or The inner surface and the outer surface of the left and right sides of the cylindrical overlapping part are respectively provided with the first inner electrode and the first outer electrode arranged correspondingly.
8. A Lissajous fiber scanner with a combined barrel body as claimed in claim 1 or 2, characterized in that, The inner surface and the outer surface of any one of the upper and lower sides of the cylindrical overlapping part are respectively provided with the second inner electrode and the second outer electrode arranged correspondingly, or The inner surface and the outer surface of the upper and lower sides of the cylindrical overlapping part are respectively provided with the second inner electrode and the second outer electrode arranged correspondingly.
9. A Lissajous fiber scanner with a combined barrel body as claimed in claim 7, characterized in that, When the inner surface and the outer surface of the left and right sides of the cylindrical overlapping part are respectively provided with the first inner electrode and the first outer electrode arranged correspondingly, the first inner electrode of the left and right sides of the cylindrical overlapping part is symmetrically arranged.
10. A Lissajous fiber scanner having a combined barrel body as claimed in claim 8, characterized in that, When the inner surface and the outer surface of the upper and lower sides of the cylindrical overlapping part are respectively provided with the second inner electrode and the second outer electrode arranged correspondingly, the second inner electrode of the upper and lower sides of the cylindrical overlapping part is symmetrically arranged.