CN209842234U - Single optical fiber resonance scanning device - Google Patents

Abstract

A single fiber resonance scanning device is composed of a piezoelectric ceramic rod (1), a light-conducting fiber core (2), a filled conductive paste (3), and outer metal electrodes (4-1), (4-2), (4-3), (4-4). The device integrates the optical fiber and the piezoelectric ceramic rod prepared by the micro-nano process, and can cause the periodic deformation of the piezoelectric film rod by loading the required electric signal to the external metal electrode, thereby realizing the vibration of the optical fiber. The device realizes the function of single optical fiber vibration scanning through integration, effectively reduces the size of core elements of a vibration scanning system, and is beneficial to application in a hyperfine micro-nano scanning system.

Description

Single optical fiber resonance scanning device

Technical Field

A single optical fiber scanning device belongs to the field of optical fibers, and particularly relates to an optical fiber device for scanning and imaging.

Background

An optical fiber is an important optical waveguide device, and guiding light emitted from a light source or collecting image information at an end of the optical fiber by using the optical fiber is two important aspects of optical fiber application, such as medical endoscope systems, laser projection systems, and the like. Usually, the diameter of the complete fiber core is from tens of microns to hundreds of microns, and in order to form a light source emitting surface or an image collecting end with a certain size, the area of the end surface of the optical fiber is enlarged mostly in a form of optical fiber bundling, so that the information collecting surface is enlarged. Such an optical fiber application method is difficult to fully exploit the advantages of the optical fiber, and not only is the end face formed limited, but also the size is difficult to reduce.

By integrating the optical fiber with a piezoelectric device having vibration characteristics, achieving vibration scanning of the optical fiber is an important breakthrough in optical fiber applications. Development to date has also emerged in the market place for many fiber scanning systems based on this concept. At present, the scanning device based on the optical fiber is mostly prepared by binding a controllable vibration device with the optical fiber, such as a piezoelectric ceramic piece, a piezoelectric ceramic column, a piezoelectric ceramic tube, and the like. All the controllable vibration devices have independent structures, so that the system with the scanning function combined with the optical fiber is mainly assembled by adopting the processes of high-temperature bonding, adhesion and the like among the devices. On one hand, the assembly process difficulty of the device under the millimeter size is higher, and on the other hand, the optical fiber scanning system realized based on the assembly process is limited by the size of the controllable vibration device and is difficult to achieve the size similar to that of an optical fiber.

Therefore, the utility model provides a single fiber resonance scanning device, this device adopt the module integrated mode, and the form that non-traditional vibration components and parts adopted a plurality of piezoelectricity modules to bind prepares the piezoelectricity the control unit, through integrated piezoceramics stick and optic fibre, can realize the minimizing of device.

SUMMERY OF THE UTILITY MODEL

The utility model discloses in the problem that exists to prior art has provided a single fiber resonance scanning device, through receiving the integrated preparation of piezoceramics stick and optic fibre that the technology obtained a little, the realization of minimumly has the optic fibre scanning system of scanning function.

A single-fiber resonance scanning device is characterized by comprising a piezoelectric ceramic rod (1), a light-conducting fiber core (2), filled conductive paste (3) and outer-layer metal electrodes (4-1), (4-2), (4-3) and (4-4), wherein the light-conducting fiber core (2) penetrates through a circular hole with the center radius R of the piezoelectric ceramic rod (1) and is filled and fixed by the conductive paste (3), and the outer-layer metal electrodes (4-1), (4-2), (4-3) and (4-4) are distributed on four side faces of the piezoelectric ceramic rod (1) and are mutually insulated.

Preferably, in the single-fiber resonance scanning device, the light-transmitting core (2) is one of a glass fiber, a plastic fiber, Polystyrene (PS), polymethyl methacrylate (PMMA), and Polycarbonate (PC).

Preferably, in the single-fiber resonance scanning device, the length of the top end of the light-conducting fiber core (2) from the piezoelectric ceramic rod (1) is l₁And l is₁Between 1mm and 20 mm.

Preferably, the single fiber resonance scanning device has an outer metal electrode (4-1), (4-2), (4-3) or (4-4) which is an electrode formed by a composite layer of one or more of a gold electrode, a silver electrode, a nickel electrode, an aluminum electrode, a copper electrode, an iron electrode, a platinum electrode, a cobalt electrode, a titanium electrode, a tungsten electrode and a molybdenum electrode.

Preferably, in the single-fiber resonance scanning device, the piezoelectric ceramic rod (1) is one of lead zirconate titanate, lead magnesium niobate zirconate titanate, lead zinc niobate titanate, and lead nickel niobate titanate.

Preferably, the cross section of the piezoelectric ceramic rod (1) of the single fiber resonance scanning device is a square with a side length a, and a is between 0.5mm and 2 mm.

Preferably, in the single-fiber resonance scanning device, the length of the piezoelectric ceramic rod (1) is l₂And l is₂Between 1mm and 10 mm.

Preferably, in the single-fiber resonance scanning device, the radius R of the central circular hole of the piezoelectric ceramic rod (1) is between 0.08mm and 0.2 mm.

Preferably, in the single-fiber resonance scanning device, the conductive paste (3) is one of conductive silver paste, conductive silver paste and conductive aluminum silver paste.

Drawings

1. FIG. 1 is a cross-sectional view of a single fiber resonance scanning device.

2. FIG. 2 is a side view of a single fiber resonance scanning device.

3. FIG. 3 is a diagram of an embodiment of a single fiber resonance scanning device.

Detailed Description

A single fiber resonance scanning device and its manner of use as described in the present invention is described in further detail below with reference to fig. 3.

A single fiber resonance scanning device has the following specific structure: an optical fiber 2 based on a glass fiber core is used as an emergent end of scanning light, a lead zirconate titanate rod with a square cross section and a side length of 1mm is used as a piezoelectric ceramic rod 1, and the length of the rod is 2 mm. The optical fiber 2 passes through a circular hole with the radius of 0.1mm in the middle of the piezoelectric ceramic rod 1 and extends out until the top end is 10mm away from the top end of the piezoelectric ceramic rod. The optical fiber 2 is fixed in the center of the circular hole by adopting conductive silver adhesive 3. Four surfaces of the side surface of the piezoelectric ceramic rod are covered with gold electrodes (4-1), (4-2), (4-3) and (4-4) which are not mutually conducted.

When the device works, 20V sinusoidal voltage and-20V sinusoidal voltage are respectively loaded on the electrodes 4-1 and 4-3, the opposite electrodes 4-2 and 4-4 are respectively vacant, and the conductive silver adhesive is used as a grounding terminal. Thus, the reverse voltage applied to the lead zirconate titanate film 3 corresponding to the 4-1 and 4-3 electrodes generates deformation in the opposite direction, and the deformation in the opposite direction finally pushes the optical fiber to deviate in the same direction. Under the control of the periodic signal, the optical fiber realizes linear scanning along the directions of 4-1 and 4-3.

The present invention is not limited to the above embodiments, and the structural elements may be modified and embodied without departing from the scope of the present invention in the implementation stage. In addition, various invention modes can be formed by appropriate combinations of a plurality of constituent elements disclosed in the above embodiments.

Claims (9)

1. A single-fiber resonance scanning device is characterized by comprising a piezoelectric ceramic rod (1), a light-conducting fiber core (2), filled conductive paste (3) and outer-layer metal electrodes (4-1), (4-2), (4-3) and (4-4), wherein the light-conducting fiber core (2) penetrates through a circular hole with the center radius R of the piezoelectric ceramic rod (1) and is filled and fixed by the conductive paste (3), and the outer-layer metal electrodes (4-1), (4-2), (4-3) and (4-4) are distributed on four side faces of the piezoelectric ceramic rod (1) and are mutually insulated.

2. A single fiber resonance scanning device according to claim 1, wherein the light conducting core (2) is one of a glass fiber, a plastic fiber, Polystyrene (PS), Polymethylmethacrylate (PMMA), Polycarbonate (PC).

3. A single-fiber resonance scanning device as claimed in claim 1, wherein the length of the tip of the light-conducting core (2) from the piezoelectric ceramic rod (1) is l₁And l is₁Between 1mm and 20 mm.

4. A single fiber resonance scanning device as claimed in claim 1, wherein the outer metal electrodes (4-1), (4-2), (4-3), (4-4) are electrodes composed of one or more composite layers of gold, silver, nickel, aluminum, copper, iron, platinum, cobalt, titanium, tungsten, molybdenum.

5. The single fiber resonance scanning device according to claim 1, wherein the piezoelectric ceramic rod (1) is one of lead zirconate titanate, lead magnesium niobate zirconate titanate, lead zinc niobate titanate, lead nickel niobate titanate.

6. A single fiber resonance scanning device according to claim 1, characterized in that the cross-section of the piezo-ceramic rod (1) is square with a side length a between 0.5mm and 2 mm.

7. Single fiber resonance scanning device according to claim 1, characterized in that the length of the piezo-ceramic rod (1) is l₂And l is₂Between 1mm and 10 mm.

8. A single fiber resonance scanning device according to claim 1, characterized in that the radius R of the central circular hole of the piezo-ceramic rod (1) is between 0.08mm and 0.2 mm.

9. A single-fiber resonant scanning device as claimed in claim 1, characterized in that the conductive paste (3) is one of a conductive silver paste, a conductive aluminum paste.