Optical fiber calibration device

Abstract

The utility model relates to the technical field of optical fiber application, in particular to an optical fiber calibration device, which comprises a base and an upper cover arranged on the base through screws, a round hole is formed in the left side of the base, a U-shaped notch is formed in the right side of the base, and a supporting part is arranged in the base. A calibration rod which is located in the base and penetrates through the U-shaped notch is supported above the supporting part, and a limiting part is arranged between the calibration rod and the upper cover. According to the optical fiber calibration device, an upper cover screw is fixed with an external positioning plate, the base can be positioned, an optical fiber is stringed into a calibration rod and extends into a ceramic ferrule, one end of the optical fiber is clamped and fixed through a clamping part, then the optical fiber is placed on the base, the upper cover is supported and locked through a supporting part, so that a limiting part is attached to the calibration rod, and the optical fiber is calibrated. When whether the optical fiber is aligned or not is observed and adjustment is needed, the adjusting nut drives the calibration rod to rotate, rotation is guaranteed under the condition of concentricity, fine adjustment of the optical fiber is achieved, and meanwhile carrying is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber application, in particular to an optical fiber calibration device. Background Technique

[0002] The fine optical fiber is encapsulated in a plastic sheath, enabling it to bend without breaking. Usually, a light-emitting diode or a laser beam at one end of the optical fiber is used to transmit light pulses to the optical fiber, and a photosensitive element at the other end of the optical fiber is used to detect the pulses.

[0003] Optical fiber calibration usually requires accuracy at the micron or even nanometer level, which poses high requirements for mechanical structures and control algorithms. In actual operation, it is difficult to continuously maintain such high accuracy. Especially in the field environment, large or bulky calibration devices are inconvenient to carry and use during field operations, lacking sufficient flexibility and being difficult to adapt to different working environments and application scenarios. Content of the Utility Model

[0004] To achieve the above object, the utility model provides the following technical solution: an optical fiber calibration device, including a base and an upper cover installed on the base through screws. A round hole is opened on the left side of the base, a U-shaped notch is opened on the right side, and a support part is arranged inside the base. Above the support part, a calibration rod passing through the base and the U-shaped notch is supported. A limiting part is arranged between the calibration rod and the upper cover. A ceramic ferrule opposite to the round hole is installed at the head end of the calibration rod, and an adjusting nut is threadedly connected to the tail end. A clamping part is installed at one end of the adjusting nut.

[0005] Further, an inner cylinder is formed on the outer side of the calibration rod, and the inner cylinder is located between the limiting part and the support part.

[0006] Further, the outer side of the calibration rod at the right side of the inner cylinder is a plane, and an outer cylinder is installed at the plane, and the outer cylinder is attached to the U-shaped notch on the right side of the base.

[0007] Further, the clamping part includes a locking ferrule installed at the port of the adjusting nut, and a locking nut threadedly connected to the outer side of the port of the adjusting nut and sleeved with the locking ferrule.

[0008] Further, the clamping part includes a locking ferrule installed at the port of the adjusting nut, and a locking nut threadedly connected to the outer side of the port of the adjusting nut and sleeved with the locking ferrule.

[0009] The inner cavity of the base is narrow at both ends and wide in the middle, and limiting holes are opened at the hinged parts of the front and rear side walls of the base where the width changes.

[0010] Further, the support part is an arc-shaped elastic sheet, and the elastic sheet is located in the middle cavity of the base.

[0011] Further, the limiting part is a limiting rod. The number of limiting rods is two, and both limiting rods are located in the middle cavity and are distributed between the two limiting holes.

[0012] Further, an L-shaped groove is provided at the bottom of the head end of the base, and two screws on the left side of the upper cover can extend to the bottom of the head end of the base to be fixed to an external positioning plate. Positioning holes opposite to the ceramic ferrule are provided on both the front and rear sides of the base.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] For this optical fiber calibration device, by fixing the upper cover screws to the external positioning plate, the positioning of the base can be achieved. Then, the optical fiber is threaded through the calibration rod and extended into the ceramic ferrule. One end of the optical fiber is clamped and fixed by the clamping part, and then placed on the base. The upper cover is supported and locked so that the limiting part is in contact with the calibration rod. Then, it is observed whether the optical fiber is aligned. When adjustment is required, the calibration rod is rotated by adjusting the nut, and it rotates while ensuring concentricity to achieve fine adjustment of the optical fiber. At the same time, it is also convenient to carry. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a three-dimensional view of the base in the present utility model;

[0017] Figure 3 is a cross-sectional view of the present utility model.

[0018] In the figure: 1. Base; 2. Ceramic ferrule; 3. Calibration rod; 4. Upper cover; 5. Locking nut; 6. Locking core; 7. Adjusting nut; 8. Limiting rod; 9. Elastic sheet. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-3, an optical fiber calibration device in this embodiment includes a base 1. A through hole is provided on the left side of the base 1, and a U-shaped notch is provided on the right side. The interior of the base 1 is a cavity that is narrow at both ends and wide in the middle. Limiting holes are provided at the hinge points of the width of the front and rear side walls of the base 1. A support part is placed in the middle cavity of the base 1 between four limiting holes. A calibration rod 3 is supported on the upper part of a spring piece 9. A ceramic ferrule 2 opposite to the through hole is inserted at the left end of the calibration rod 3, and an adjusting nut 7 is threadedly connected to the right end. A clamping part is installed on the adjusting nut 7. The top of the base 1 is locked by a screw with an upper cover 4. Two limiting rods 8 are placed between the calibration rod 3 and the upper cover 4. Both of the two limiting rods 8 are located in the middle cavity and are respectively distributed between two limiting holes.

[0021] In the above structure, first, the ceramic ferrule, calibration rod, adjusting nut and clamping part are assembled. After assembly, the optical fiber is inserted. The optical fiber is clamped and fixed by the clamping part, and then placed in the base and supported by the support part. Then the upper cover is locked to press the limiting rods, and the calibration rod is limited by the limiting rods. When the optical fiber needs to be adjusted, the adjusting nut rotates the calibration rod to adjust it. When rotating under the condition of ensuring the concentricity of the optical fiber, the collimation of the optical fiber is ensured. When not in use, it is also convenient for disassembly, storage, and thus can also be easily carried and adapted to different working environments and application scenarios.

[0022] Among them, the clamping part includes a locking core 6 inserted into the right port of the adjusting nut 7. The locking core 6 is bullet-shaped, and a cross-shaped notch is provided at the right end of the locking core 6. A locking nut 5 is sleeved on the outside of the locking core 6 and is threadedly connected to the outside of the right end of the adjusting nut 7. The inner side of the locking nut 5 is conical. When the optical fiber extends into the locking core, by rotating the locking nut to be threadedly connected with the adjusting nut, when the locking nut is screwed in, the inner diameter of the locking nut becomes smaller and will squeeze the four petals of the locking core to close and tightly hold the optical fiber, thereby achieving the function of clamping and fixing.

[0023] In addition, the support part is a spring piece 9 in an arc shape. An inner cylinder is formed on the outside of the calibration rod 3, and there is an error in the circle of the inner cylinder, so it is not a standard circle. The inner cylinder is located between the spring piece 9 and the two limiting rods 8. When the optical fiber needs to be corrected, the adjusting nut drives the calibration rod to rotate. Through the rotation of the inner cylinder, the inner cylinder will also squeeze the spring piece during rotation. During the squeezing process, the calibration rod will move up and down to achieve fine adjustment of the optical fiber to complete the correction operation. At the same time, the limiting holes can limit the limiting rods and the spring piece to prevent position deviation from affecting the support and limiting effects.

[0024] Meanwhile, the outer side of the calibration rod 3 is located on the upper plane on the right side of the inner cylinder, and an outer cylinder is fixed to the plane of the calibration rod 3 by bolts. After the calibration rod is assembled, it is placed in the base. Through the U-shaped notch, the inner cylinder and the outer cylinder can be separated. When placing, the outer cylinder is in contact with the right side of the base for limiting, enabling the calibration rod to move to the specified position.

[0025] Further, a notch is provided at the bottom of the head end of the base 1. Two screws on the left side of the upper cover 4 can pass through the base 1 and be fixed to the external fixing plate. At the same time, positioning holes opposite to the ceramic ferrule 2 are provided on the front and rear sides of the head end of the base 1. By tightening the screws on the left side of the upper cover and fixing them to the external fixing plate, the base can be fixed, improving the stability during calibration. At the same time, the two positioning bolts can also be inserted to be in contact with the ceramic ferrule to achieve the adjustment effect. After calibration is completed, the positioning bolts can also be used to limit and fix it to prevent deviation after calibration.

[0026] The working principle of the above embodiment is as follows:

[0027] First, insert the ceramic ferrule into the calibration rod, then install the outer cylinder on the calibration rod, tighten the adjusting nut, insert the locking core at the port of the adjusting nut, then pass the optical fiber through in sequence, and thread the locking nut with the adjusting nut, so that the locking core clamps and fixes the optical fiber. After fixation, place it in the base and fix it with the elastic piece until the outer cylinder is in contact with the right side of the base, enabling the calibration rod to drive the ceramic ferrule to move to the specified position and stop. Fix the upper cover and limit the calibration rod with the limiting rod. Two of the screws of the upper cover pass through the base and are fixed to the external fixing plate to position the base. When adjusting the optical fiber, rotate the calibration rod by driving the adjusting nut, rotate under the condition of ensuring concentricity, and the inner cylinder rotates and cooperates with the elastic piece to squeeze to complete the adjustment of the optical fiber calibration. At the same time, the fine adjustment and the limit after the adjustment can also be realized by tightening the positioning bolts into the positioning holes and being in contact with the ceramic ferrule, improving the stability.

[0028] In summary, the structure is assembled, and at the same time, it is small in size and easy to carry, and can adapt to different working environments and application scenarios to complete the calibration of the optical fiber.

[0029] The entire work process is over, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0030] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical fiber calibration device, characterized in that: The invention comprises a base (1) and an upper cover (4) mounted on the base (1) by screws, wherein a circular hole is formed on the left side of the base (1) and a U-shaped notch is formed on the right side, and a support portion is provided inside the base (1), and a calibration rod (3) located in the base (1) and passing through the U-shaped notch is supported above the support portion, a limiting portion is provided between the calibration rod (3) and the upper cover (4), a ceramic insert (2) opposite to the circular hole is mounted on the head end of the calibration rod (3), and an adjusting nut (7) is threadedly connected to the tail end, and a clamping portion is mounted on one end of the adjusting nut (7).

2. An optical fiber calibration device according to claim 1, characterized in that: An inner cylinder is formed on the outer side of the calibration rod (3), and the inner cylinder is located between the limiting portion and the supporting portion.

3. The optical fiber calibration device according to claim 2, characterized in that: The outer side of the calibration rod (3) is located on the right side of the inner cylinder and is a plane, and an outer cylinder is installed on the plane, and the outer cylinder is attached to the U-shaped notch on the right side of the base (1).

4. The optical fiber calibration device according to claim 1, characterized in that: The clamping portion comprises a locking core (6) mounted at the end of the adjusting nut (7), and a locking nut (5) sleeved with the locking core (6) is threadedly connected to the outer side of the end of the adjusting nut (7).

5. The optical fiber calibration device according to claim 1, characterized in that: The internal cavity of the base (1) is narrow at both ends and wide in the middle, and limiting holes are provided on the front and rear side walls of the base (1) at the wide and narrow hinged locations.

6. The optical fiber calibration device according to claim 5, characterized in that: The supporting portion is an arc-shaped spring sheet (9), and the spring sheet (9) is located in the middle cavity of the base (1).

7. The optical fiber calibration device according to claim 5, characterized in that: The limiting part is a limiting rod (8), the number of the limiting rods (8) is two, and the two limiting rods (8) are both located in the middle cavity and distributed between the two limiting holes.

8. The optical fiber calibration device according to claim 1, characterized in that: The bottom of the front end of the base (1) is provided with an L-shaped groove, and two screws on the left side of the upper cover (4) can be extended to the bottom of the front end of the base (1) and fixed to the external positioning plate, and the front and rear sides of the base (1) are provided with positioning holes corresponding to the ceramic ferrule (2).

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