CN114063368A - Optical fiber scanning device - Google Patents

Abstract

The invention discloses an optical fiber scanning device, which comprises a base and a driver, wherein the driver comprises a connecting part and an actuator, the actuator comprises an optical fiber scanning component, a tubular shell fixedly sleeved outside the optical fiber scanning component and a lens mount, one end of the lens mount connected with the tubular shell is of a cylindrical structure, the cylindrical structure is sleeved outside the front end of the tubular shell, at least three bolt fastening structures are arranged on the cylindrical structure along the circumferential direction, each bolt fastening structure comprises at least two fastening bolts sequentially arranged along the axial direction, the fastening bolts are arranged in corresponding threaded through holes of the cylindrical structure, and the tail ends of the fastening bolts are tightly pressed on the outer surface of the tubular shell. The invention can realize the precise assembly and fixation of the optical fiber actuator and the lens, improve the assembly precision and reduce the assembly difficulty; the installation of driver and tearing open and trade have been made things convenient for, and the driver is installed in the recess of base and is compressed tightly fixedly by the clamp plate and can realize the electric connection of driver, conveniently changes the maintenance, and the operation degree of difficulty is low.

Description

Optical fiber scanning device

Technical Field

The invention relates to the technical field of optical fiber scanning structures, in particular to an optical fiber scanning device.

Background

The imaging principle of the optical fiber scanning projection technology is that the scanning optical fiber is driven by the actuator to move in a preset two-dimensional scanning track, the light emitting power of the light source is modulated, and information of each pixel point of an image to be displayed is projected onto an imaging area one by one, so that a projection picture is formed.

The optical fiber scanning projection system comprises: the device comprises a processor, a light source modulation module, a light source beam combining module, an optical fiber scanner and a scanning driving circuit. The processor controls the optical fiber scanner to vibrate and scan by sending an electric control signal to the scanning driving circuit, and simultaneously, the processor controls the light emitting power of the light source beam combining module by sending the electric control signal to the light source modulation module. The light source modulation circuit outputs a light source modulation signal according to the received control signal so as to modulate one or more light source units (which can be lasers/light emitting diodes and the like) of colors in the light source beam combining module.

The light generated by the light source unit of each color in the light source beam combining module generates color and gray information of each pixel point one by one after being combined, and the combined light beam emitted by the light source beam combining module is guided into the optical fiber scanner through the optical fiber. Synchronously, the scanning drive circuit outputs a scanning drive signal according to the received control signal so as to control the scanning optical fiber in the optical fiber scanner to move along a preset two-dimensional scanning track (spiral scanning, grid type scanning, Lissajous scanning and the like), and each pixel point information of the image to be displayed is projected onto the imaging area one by one, thereby forming a projection picture.

Due to structural or working errors, deviation of the position and the angle of the optical fiber is inevitable, and if the two factors are deviated, the position of the emergent light of the optical fiber at the lens is influenced; the optical fiber scanning driver itself may cause the deviation of the light-emitting optical axis from the expected due to the structure or manufacturing error, which all cause the corresponding emergent image to be distorted, eccentric, difficult to focus, and the like.

Some fiber scanners are also provided with a feedback structure or a monitoring structure, and the feedback structure or the monitoring structure is connected with a feedback signal acquisition circuit or a monitoring signal acquisition circuit through a signal wire. As shown in fig. 1, the structure of the conventional fiber scanner includes an actuator 101, an optical fiber 102, a fixing member 103, and a package housing 104. As shown in the dotted line, the tail end of the actuator 101 needs to be structurally fixed with the package housing 104, the optical fiber 102 at the tail end of the actuator 101 is connected with the beam combining module 105, and the electrical signal pins of the actuator 101 need to be connected with a peripheral circuit through wires, where the electrical signal pins may include, for example, an electrode pin, a feedback signal pin, a monitoring signal pin, and the like, and the peripheral circuit may include, for example, a driving circuit, a feedback signal acquisition circuit, a monitoring signal acquisition circuit, and the like. This results in the optical fiber and the wires being required to pass through the package housing, and both the optical fiber and the wires are fixedly connected to the actuator, which makes the assembly, disassembly and maintenance of the actuator more difficult.

Disclosure of Invention

The embodiment of the invention provides an optical fiber scanning device, which can enable a lens component to be accurately positioned at a position adaptive to the optical fiber scanning component and can effectively avoid the phenomena of distortion, eccentricity, difficulty in focusing and the like of an emergent image.

In order to achieve the above object, the present invention provides an optical fiber scanning device, which includes an optical fiber scanning assembly, a tubular housing fixedly sleeved outside the optical fiber scanning assembly, and a lens mount, wherein the lens mount is installed inside the lens mount, the lens mount is installed at the front end of the tubular housing with the direction of light beam emergence of the optical fiber scanning assembly as the front, one end of the lens mount connected to the tubular housing is a cylindrical structure, the cylindrical structure is sleeved outside the front end of the tubular housing, at least three bolt fastening structures are circumferentially arranged on the cylindrical structure, each bolt fastening structure includes at least two fastening bolts sequentially arranged along the axial direction, the cylindrical structure is provided with a threaded through hole for installing the fastening bolt, the fastening bolt is installed in the corresponding threaded through hole, and the tail end of the fastening bolt is pressed against the outer surface of the tubular housing.

Therefore, the position of the lens seat relative to the tubular shell can be adjusted by adjusting the screwing-in depth of the fastening bolts of each bolt fastening structure, the left-right, up-down and front-back position adjustment of the lens component relative to the optical fiber scanning component can be realized, and the deflection adjustment of the lens component relative to the optical fiber scanning component can be realized within a certain range. The lens component can be accurately positioned in front of the optical fiber scanning component in a position-adjustable manner, and the lens component can be accurately positioned in a position matched with the optical fiber scanning component.

Preferably, the end of the fastening bolt contacting one end of the tubular housing is of a ball head structure, and the ball head structure is fixed to the outer surface of the tubular housing through curing glue. The ball head structure means that the end face of one end of the fastening bolt, which is contacted with the tubular shell, is a spherical surface. The highest positioning accuracy between the optical fiber scanning assembly and the lens assembly can reach micron level, and the screwing of the fastening bolt is difficult to achieve simultaneous screwing or consistent screwing degree, so that the uncontrollable relative displacement between the lens seat and the tubular shell can be generated in the process of screwing the fastening bolt, and the accurate positioning and fixing are difficult to achieve. The fastening bolt with the ball head structure can be only used for pre-positioning the tubular shell and the lens seat, accurate positioning is easy to realize due to small pre-positioning screwing force, then curing glue is filled between the ball head structure and the tubular shell after the pre-positioning is completed, and because the periphery of the curing glue is not limited by resistance, stress generated in the curing process of the curing glue is released through the periphery, force along the radial direction of the tubular shell cannot be generated on the end face of the spherical structure and the surface of the tubular shell, namely the pre-positioning of the tubular shell and the lens seat cannot be influenced, the relative displacement between the tubular shell and the lens seat cannot be caused by the curing of the curing glue, and the positioning precision is ensured while firm connection is realized.

The optical fiber scanning assembly comprises a driver and an optical fiber, wherein the driver comprises an actuator, two ends of the actuator are respectively a free end and a fixed end, and the optical fiber is fixedly arranged at the free end of the actuator in a cantilever supporting mode. That is, one end of the optical fiber emergent beam exceeds the free end of the actuator to form an optical fiber cantilever, and the part of the optical fiber close to the optical fiber cantilever is fixedly connected with the free end of the actuator.

Preferably, the optical fiber scanning device further comprises a base and a cover plate, the driver comprises a connecting part and an actuator which are sequentially arranged along the direction from back to front, the fixed end of the actuating part is fixedly connected with the connecting part, the outer surface of the connecting part is provided with a plurality of first electric connecting pieces, each first electric connecting piece is respectively connected with a corresponding electric signal pin of the actuator through a corresponding conductive piece, the first electric connecting pieces are arranged on the rear side of the connecting part, a tubular shell is sleeved outside the part, which is not provided with the first connecting piece, of the front side of the connecting part, the actuator is positioned in the tubular shell, the base is provided with a groove which is used for installing the connecting part and the tubular shell and extends along the front-back direction, and the inner wall of the groove is provided with second electric connecting pieces which are arranged in one-to-one correspondence with the first electric connecting pieces; the connecting part and the rear part of the tubular shell are arranged in the groove, the first electric connecting piece is in contact with the corresponding second electric connecting piece, and the cover plate is fixedly connected with the base and tightly presses and fixes the tubular shell in the groove.

Therefore, the pressure plate is pressed on the outer surface of the tubular shell, and preferably, the shape of the inner surface of the groove is matched with the shape of the outer surface of the tubular shell, so that the outer surface of the tubular shell is attached to the inner surface of the groove.

Preferably, the front end of the connecting part is provided with a mounting hole for mounting the actuator, and the rear end of the actuator is fixedly mounted in the mounting hole.

Preferably, the front and upper portions of the groove are open, one side of the cover plate is hinged to the base on the left or right side of the groove through a hinge shaft extending in the front-rear direction, the cover plate is rotatably covered on the upper portion of the groove around the hinge shaft and is fixedly connected with the base through a connecting piece, and the portion of the tubulose shell located in the groove is pressed and fixed by the cover plate. So that the rear end of the driver is fixed in the recess and the front end of the driver extends forwardly beyond the recess. Optionally, the connecting member may be a connecting bolt, a connecting buckle, an adhesive connecting member, a welding connecting member, or the like, which is not limited thereto.

Optionally, the electrical signal pin includes at least one of an electrode pin, a feedback signal pin and a monitoring signal pin.

Further preferably, the connecting portion is provided with a through hole for passing the optical fiber therethrough. Furthermore, the through hole can be a through hole penetrating through the connecting part, and can also be a blind hole, and a plug used for connecting the optical fiber is installed in the blind hole.

The first electric connecting piece can be a metal sheet or a metal ring attached to the outer surface of the connecting part; the first electric connector is embedded in the connecting part or integrally formed in the connecting part, and the first electric connector is provided with a first contact part which is in contact connection with the second electric connector. Each electric signal pin on the actuator is connected with the corresponding first electric connecting piece through a conductive piece, the conductive pieces are insulated from each other, and the first electric connecting pieces are also insulated from each other. The conductive member may be a conductive wire, a metal member, or the like. Preferably, the conductive member is a printed wire, so that the influence of the conductive member on the vibration performance of the actuator can be avoided.

The second electric connecting piece can be a metal sheet or a metal ring which is attached to the inner surface of the groove; the first electric connector is embedded in the base, the second electric connector is embedded in the base, the first electric connector is embedded in the base, the second electric connector is embedded in the base, and the first electric connector is embedded in the base. Each second electric connector is connected with the corresponding external device through the conductive piece arranged on the base.

As a preferred embodiment, the first connecting member is a plurality of metal rings arranged on the outer surface of the connecting portion, the metal rings are sequentially arranged at intervals along the axial direction, the insulating member is arranged between adjacent metal rings, the second connecting member is a plurality of conductive pins arranged in the groove, and the conductive pins and the metal rings are arranged in a one-to-one correspondence manner. Further preferably, the conductive contact pin is fixedly arranged on the circuit board, the base is provided with a mounting hole for the conductive contact pin to penetrate into the groove, the conductive contact pin is inserted into the mounting hole, and the circuit board is fixedly connected with the base. Preferably, the circuit board is provided with a USB socket, the USB socket is connected to each conductive pin through a conductive member, and the USB socket is connected to an external control device through a data line.

A detachable connecting structure for fixedly connecting the two parts is arranged between the connecting part and the base. The detachable connection structure can be a bolt connection structure, a clamping connection structure or a bolt connection structure. The bolt connecting structure can be that base and connecting portion are last all to be provided with the pinhole, treat that connecting portion cartridge goes into the jack after, the bolt penetrates the pinhole of base and connecting portion in proper order to realize connection between them. The clamping structure can be provided with the arch or recess for the surface of connecting portion, the internal surface of jack is provided with recess or arch with connecting portion matched with to protruding joint is in corresponding recess. The bolt connection structure can be that base and connecting portion all are provided with the connecting hole that is used for connecting bolt, base and connecting portion pass through the bolt and realize fixed connection.

The connecting part and the actuator can be of an integrally formed structure. Preferably, in order to reduce the processing difficulty, especially to reduce the processing difficulty of the connecting part, the connecting part and the actuator are two parts which are respectively and separately processed, and the connecting part is fixedly connected with the actuator through a connecting piece. Preferably, one end of the connecting part connected with the actuator is provided with a connecting hole for connecting a connecting piece, one end of the actuator connected with the connecting part is provided with a connecting hole for connecting a plug connector, and two ends of the connecting piece are respectively inserted into the connecting hole of the connecting part and the connecting hole of the actuator and are fixedly connected, such as screw fixation, welding fixation, adhesive fixation and the like. Preferably, the connecting piece is of a column type. Further preferably, the connector is provided with a through hole for passing a conductive member or an optical fiber for connecting the first electrical connector and the electrical signal pin of the actuator. It is further preferred that the actuator is also internally provided with a through hole for the passage of the optical fiber, so that the optical fiber passes through the through hole of the connecting part, the through hole of the connecting part and the through hole of the actuator in this order and is fixed to the free end of the actuator in a cantilever-supported manner.

Preferably, the actuator is a tubular actuator, and the inner hole of the tubular actuator is a connecting hole for connecting the connecting piece and a through hole for passing the optical fiber. The tubular actuator can be a two-part tube or a four-part tube piezoelectric actuator, and a piezoceramic sheet can also be arranged on the outer surface of the tubular main body. At this time, in order to enhance the connection stability between the optical fiber and the actuator, a ferrule is fixedly installed in the inner hole of the free end of the tubular actuator, a through hole for the optical fiber to pass through is arranged in the ferrule, and the optical fiber in the inner hole of the tubular actuator passes through the through hole of the ferrule and is fixedly connected with the ferrule. The part of the optical fiber penetrating out of the ferrule forms an optical fiber cantilever, and the optical fiber and the ferrule are fixedly connected with the ferrule through gluing or welding or other fixing modes. Optionally, the actuator is a bimorph actuator.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

the invention can realize the accurate assembly and fixation of the optical fiber actuator and the lens, improve the assembly precision and reduce the assembly difficulty. The invention facilitates the installation and the disassembly and the replacement of the driver, the driver is installed in the groove of the base and is pressed and fixed by the pressing plate to realize the electrical connection of the driver, the whole driver is an independent part, the replacement and the maintenance are convenient, and the operation difficulty is low.

Drawings

FIG. 1 is a schematic diagram of a conventional fiber scanner;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic view of the connection structure between the cylindrical structure and the lens holder of the embodiment shown in FIG. 2;

FIG. 4 is a schematic cross-sectional view of the cylindrical structure and the lens holder of the embodiment shown in FIG. 2;

FIG. 5 is a schematic cross-sectional view of the present invention with the lens mount removed;

FIG. 6 is a schematic view of the structure of the recess and the circuit board on the base according to the present invention;

FIG. 7 is a schematic view of another perspective structure of the recess on the base and the circuit board according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides an optical fiber scanning device which is used for better realizing optical path connection and structural connection.

As shown in fig. 2-4, the optical fiber scanning device includes an optical fiber scanning assembly, a tubular housing 1 fixedly sleeved outside the optical fiber scanning assembly, and a lens mount 2, wherein a lens assembly 21 is installed in the lens mount 2, and the direction of light beam emergence of the optical fiber scanning assembly is taken as the front, preferably, the front end of the tubular housing 1 exceeds the optical fiber scanning assembly, and certainly can be flush with or not exceed the optical fiber scanning assembly, as long as the optical fiber scanning assembly is matched with the lens assembly 21 in the lens mount 2, the lens mount 2 is installed at the front end of the tubular housing 1, one end of the lens mount 2 connected with the tubular housing 1 is a cylindrical structure 22, the cylindrical structure 22 is sleeved outside the front end of the tubular housing 1, at least three bolt fastening structures are arranged on the cylindrical structure 22 along the circumferential direction, each bolt fastening structure includes at least two fastening bolts 23 arranged in sequence along the axial direction, the cylindrical structure 22 is provided with a threaded through hole for mounting the fastening bolt 23, the fastening bolt 23 is mounted in the corresponding threaded through hole, and the end of the fastening bolt 23 is pressed against the outer surface of the tubular housing 1.

Therefore, by adjusting the screwing depth of the fastening bolts 23 of each bolt fastening structure, the position of the lens mount 2 relative to the tubular housing 1 can be adjusted, the left-right, up-down, front-back position adjustment of the lens assembly 21 relative to the optical fiber scanning assembly can be realized, and the deflection adjustment of the lens assembly 21 relative to the optical fiber scanning assembly can be realized within a certain range. So that the lens assembly 21 can be accurately positioned in front of the optical fiber scanning assembly in a position adjustable manner, so that the lens assembly 21 can be accurately positioned in a position adapted to the optical fiber scanning assembly.

Further preferably, as shown in fig. 4, an end of the fastening bolt 23 contacting one end of the tubular housing 1 is a ball head structure 24, and the ball head structure 24 and the outer surface of the tubular housing 1 are fixed by bonding with a curing adhesive 25. The ball head structure 24 means that the end surface of the fastening bolt 23 contacting one end of the tubular housing 1 is a spherical surface. For the highest positioning accuracy between the optical fiber scanning assembly and the lens assembly 21 reaching micron level, it is difficult to simultaneously screw or screw the fastening bolts 23 in the same degree, which results in the uncontrollable relative displacement between the lens holder 2 and the tubular housing 1 during screwing the fastening bolts 23, and it is difficult to accurately position and fix. The fastening bolt 23 with the ball head structure 24 can be only used for pre-positioning the tubular shell 1 and the lens holder 2, accurate positioning is easy to achieve due to small pre-positioning screwing force, then the curing glue 25 is filled between the ball head structure 24 and the tubular shell 1 after pre-positioning is completed, due to the fact that the periphery of the curing glue 25 is free of resistance limitation, stress generated in the curing process of the curing glue 25 is released through the periphery, force along the radial direction of the tubular shell 1 cannot be generated on the end face of the spherical structure and the surface of the tubular shell 1, namely, the pre-positioning of the tubular shell 1 and the lens holder 2 cannot be influenced, relative displacement between the tubular shell 1 and the lens holder 2 cannot be caused by curing of the curing glue 25, firm connection is achieved, and positioning accuracy is guaranteed.

As shown in fig. 5, the fiber scanning assembly includes a driver 3 and an optical fiber 4, the driver 3 includes an actuator, two ends of the actuator are respectively a free end and a fixed end, and the optical fiber 4 is fixedly mounted on the free end of the actuator in a cantilever manner. That is, the end of the optical fiber 4 emitting the light beam beyond the free end of the actuator forms a fiber cantilever, and the part of the optical fiber 4 near the fiber cantilever is fixedly connected with the free end of the actuator.

Further preferably, as shown in fig. 5, 6 and 7, the optical fiber scanning device further comprises a base 5 and a cover 6, the driver 3 comprises a connecting part 32 and an actuator which are sequentially arranged along the direction from back to front, the fixed end of the actuating part is fixedly connected with the connecting part 32, the outer surface of the connecting part 32 is provided with a plurality of first electric connecting pieces 71, each first electric connecting piece 71 is respectively connected with a corresponding electric signal pin of the actuator through a corresponding conductive piece, the first electric connector 71 is arranged at the rear side of the connecting part 32, the part of the front side of the connecting part 32, which is not provided with the first connecting part, is sleeved outside the tubular shell 1, the actuator is positioned in the tubular shell 1, the base 5 is provided with a groove 51 which is used for installing the connecting part 32 and the tubular shell 1 and extends along the front-back direction, and the inner wall of the groove 51 is provided with second electric connectors 72 which are arranged in one-to-one correspondence with the first electric connectors 71; the connecting portion 32 and the rear portion of the tubular housing 1 are mounted in the groove 51, the first electrical connectors 71 are in contact with the corresponding second electrical connectors 72, and the cover plate 6 is fixedly connected with the base 5 and tightly presses and fixes the tubular housing 1 in the groove 51.

Thus, the pressing plate is pressed on the outer surface of the tubular casing 1, and preferably, the shape of the inner surface of the groove 51 is matched with the shape of the outer surface of the tubular casing 1, so that the outer surface of the tubular casing 1 is attached to the inner surface of the groove 51.

Preferably, the front end of the connecting portion 32 is provided with a mounting hole for mounting the actuator, and the rear end of the actuator is fixedly mounted in the mounting hole.

Preferably, the front and upper portions of the groove 51 are opened, one side of the cover 6 is hinged to the base 5 on the left or right side of the groove 51 by a hinge shaft extending in the front-rear direction, the cover 6 is rotatably covered on the upper portion of the groove 51 by a hinge shaft and is fixedly connected to the base 5 by a connecting member, and the portion of the tubular housing 1 located in the groove 51 is pressed and fixed by the cover 6. So that the rear end of the driver 3 is fixed in the recess 51 and the front end of the driver 3 extends forward beyond the recess 51. Optionally, the connecting member may be a connecting bolt, a connecting buckle, an adhesive connecting member, a welding connecting member, or the like, which is not limited thereto.

Optionally, the electrical signal pin includes at least one of an electrode pin, a feedback signal pin and a monitoring signal pin.

It is further preferred that the connecting portion 32 is provided with a through hole for passing the optical fiber therethrough. Further, the through hole may be a through hole penetrating the connecting portion 32, or may be a blind hole, and a plug for connecting an optical fiber is installed in the blind hole.

The first electrical connector 71 may be a metal sheet or a metal ring attached to the outer surface of the connecting portion 32; or may be a metal member embedded in the connecting portion 32 or integrally formed in the connecting portion 32, and has a contact portion for contacting and connecting with the second electrical connector 72, where the contact portion may be an arc surface, an annular surface, or the like, or may be a contact. Each electrical signal pin on the actuator is connected to the corresponding first electrical connector 71 through a conductive member, which is insulated from the conductive member, and the first electrical connectors 71 are also insulated from each other. The conductive member may be a conductive wire, a metal member, or the like. Preferably, the conductive member is a printed wire, so that the influence of the conductive member on the vibration performance of the actuator can be avoided.

The second electrical connector 72 may be a metal sheet or a metal ring attached to the inner surface of the groove 51; or may be a metal piece embedded in the base 5 or integrally formed in the base 5, and has a contact portion for contacting and connecting with the first electrical connector 71, where the contact portion may be an arc surface, an annular surface, or the like, or may be a conductive structural member such as a pin or a contact. Each second electrical connector 72 is connected to an external corresponding device through a conductive member provided on the base 5. Further preferably, the circuit board 8 is provided with a USB socket 81, the USB socket 81 is connected to each conductive pin through a conductive member, and the USB socket 81 is connected to an external control device through a data line 82.

As a preferred embodiment, the first connecting member is a plurality of metal rings disposed on the outer surface of the connecting portion 32, the metal rings are sequentially disposed at intervals along the axial direction, an insulating member is disposed between adjacent metal rings, the second connecting member is a plurality of conductive pins disposed in the groove 51, and the conductive pins and the metal rings are disposed in a one-to-one correspondence manner. Further preferably, the conductive pins are fixedly arranged on the circuit board 8, the base 5 is provided with mounting holes for the conductive pins to penetrate into the grooves 51, the conductive pins are inserted into the mounting holes, and the circuit board 8 is fixedly connected with the base.

A detachable connecting structure for fixedly connecting the two parts is arranged between the connecting part 32 and the base 5. The detachable connection structure can be a bolt connection structure, a clamping connection structure or a bolt connection structure. The bolt connecting structure can be that base 5 and connecting portion 32 are last all to be provided with the pinhole, treat that connecting portion 32 cartridge goes into the jack after, the bolt penetrates base 5 and connecting portion 32's pinhole in proper order to realize connection between them. The clamping structure can be that the surface of connecting portion 32 is provided with arch or recess 51, the internal surface of jack is provided with recess 51 or the arch with connecting portion 32 matched with to the protruding joint is in corresponding recess 51. The bolt connection structure can be that base 5 and connecting portion 32 all are provided with the connecting hole that is used for connecting bolt, and base 5 and connecting portion 32 realize fixed connection through the bolt.

The connecting portion 32 and the actuator may be formed as an integral structure. Preferably, in order to reduce the processing difficulty, especially the processing difficulty of the connecting portion 32, the connecting portion 32 and the actuator are two separately processed components, and the connecting portion 32 is fixedly connected with the actuator through a connecting member. Preferably, one end of the connecting portion 32 connected to the actuator has a connecting hole for connecting a connecting element, one end of the actuator connected to the connecting portion 32 has a connecting hole for connecting a plug connector, and two ends of the connecting element are respectively inserted into the connecting hole of the connecting portion 32 and the connecting hole of the actuator and are both fixedly connected, such as screw fixation, welding fixation, adhesive fixation, and the like. Preferably, the connecting piece is of a column type. Further preferably, the connector is provided with a through hole for passing a conductive member or an optical fiber for connecting the first electrical connector 71 and the electrical signal pin of the actuator. It is further preferred that the actuator is also internally provided with a through hole for the passage of the optical fiber, so that the optical fiber passes through the through hole of the connection portion 32, the through hole of the connection member and the through hole of the actuator in this order and is fixed to the free end of the actuator in a cantilever-supported manner.

Preferably, the actuator is a tubular actuator, and the inner hole of the tubular actuator is a connecting hole for connecting the connecting piece and a through hole for passing the optical fiber. The tubular actuator can be a two-part tube or a four-part tube piezoelectric actuator, and a piezoceramic sheet can also be arranged on the outer surface of the tubular main body. At this time, in order to enhance the connection stability between the optical fiber and the actuator, a ferrule is fixedly installed in the inner hole of the free end of the tubular actuator, a through hole for the optical fiber to pass through is arranged in the ferrule, and the optical fiber in the inner hole of the tubular actuator passes through the through hole of the ferrule and is fixedly connected with the ferrule. The part of the optical fiber penetrating out of the ferrule forms an optical fiber cantilever, and the optical fiber and the ferrule are fixedly connected with the ferrule through gluing or welding or other fixing modes. Optionally, the actuator is a bimorph actuator.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" or "comprises" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The use of the words first, second, third, etc. do not denote any order, but rather the words are to be construed as names.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

the invention can realize the accurate assembly and fixation of the optical fiber actuator and the lens, improve the assembly precision and reduce the assembly difficulty. The invention facilitates the installation and the disassembly and the replacement of the driver 3, the driver 3 is arranged in the groove 51 of the base 5 and is pressed and fixed by the pressing plate, the electric connection of the driver 3 can be realized, the whole driver 3 is an independent part, the replacement and the maintenance are convenient, and the operation difficulty is low.

All features disclosed in this specification, except features that are mutually exclusive, may be combined in any way.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims (10)

1. An optical fiber scanning device is characterized by comprising a base and a driver, wherein the driver comprises a connecting part and an actuator which are sequentially arranged, the actuator comprises an optical fiber scanning component, a tubular shell fixedly sleeved outside the optical fiber scanning component and a lens mount, the lens component is installed in the lens mount, use the direction of optic fibre scanning subassembly light beam outgoing as preceding, the lens mount is installed in the front end of tubulose casing, the one end that the tubulose casing is connected to the lens mount is the tubular structure, the tubular structure suit is in the outside of tubulose casing front end, the last at least three bolt-up structure that is provided with of tubular structure along circumference, every bolt-up structure all includes two at least fastening bolts that set gradually along the axial, the last screw thread through-hole that is used for installing fastening bolt that is provided with of tubular structure, fastening bolt installs in the screw thread through-hole that corresponds and fastening bolt's end compresses tightly in the surface of tubulose casing.

2. An optical fiber scanning device as claimed in claim 1, wherein the end of the fastening bolt contacting one end of the tubular housing is of a ball head structure, and the ball head structure is fixed to the outer surface of the tubular housing by bonding with a curing adhesive.

3. An optical fiber scanning device as claimed in claim 2, wherein said ball head structure is characterized in that the end surface of the fastening bolt contacting one end of the tubular housing is spherical.

4. An optical fiber scanning device according to any one of claims 1-3, wherein the optical fiber scanning assembly comprises a driver and an optical fiber, the driver comprises an actuator, the two ends of the actuator are respectively a free end and a fixed end, and the optical fiber is fixedly mounted on the free end of the actuator in a cantilever manner.

5. An optical fiber scanning device as claimed in claim 4, wherein the optical fiber scanning device further comprises a base and a cover, the driver comprises a connecting portion and an actuator sequentially arranged along a direction from back to front, a fixed end of the actuating portion is fixedly connected with the connecting portion, a plurality of first electrical connectors are arranged on an outer surface of the connecting portion, each first electrical connector is connected with a corresponding electrical signal pin of the actuator through a corresponding conductive member, the first electrical connectors are arranged on a rear side of the connecting portion, a part of the front side of the connecting portion, which is not provided with the first electrical connector, is sleeved with the tubular housing, the actuator is located in the tubular housing, the base is provided with a groove for mounting the connecting portion and the tubular housing and extending along the front-back direction, and an inner wall of the groove is provided with second electrical connectors arranged in one-to-one correspondence with the first electrical connectors; the connecting part and the rear part of the tubular shell are arranged in the groove, the first electric connecting piece is in contact with the corresponding second electric connecting piece, and the cover plate is fixedly connected with the base and tightly presses and fixes the tubular shell in the groove.

6. An optical fiber scanning device according to claim 5, wherein the groove is opened at a front portion and an upper portion thereof, one side of the cover plate is hinged to the base at a left side or a right side of the groove by a hinge shaft extending in a front-rear direction, the cover plate is rotatably fitted over the upper portion of the groove around the hinge shaft and is fixedly coupled to the base by a coupling member, and a portion of the tubular housing located in the groove is pressed and fixed by the cover plate.

7. An optical fiber scanning device as claimed in claim 5 or 6, wherein said electrical signal pins comprise at least one of electrode pins, feedback signal pins and monitor signal pins.

8. An optical fiber scanning device as claimed in claim 5 or 6, wherein the first connecting member is a plurality of metal rings disposed on the outer surface of the connecting portion, the plurality of metal rings are sequentially spaced in the axial direction, and an insulating member is disposed between adjacent metal rings.

9. An optical fiber scanning device as claimed in claim 8, wherein the second connecting member is a plurality of conductive pins disposed in the grooves, the conductive pins corresponding to the metal rings one to one.

10. An optical fiber scanning device as claimed in claim 9, wherein the conductive pins are fixedly mounted on a circuit board, the base is provided with mounting holes for the conductive pins to pass through the grooves, the conductive pins are inserted into the mounting holes, and the circuit board is fixedly connected to the base.

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