Polarization-maintaining dual-fiber pigtail alignment equipment

Abstract

The present invention provides a polarization-maintaining dual-fiber pigtail alignment device, which includes a base, a CCD camera, a pigtail fixing device and two optical fiber rotating clamps, wherein the CCD camera, the pigtail fixing device and the two optical fiber rotating clamps are all mounted on the base, and the CCD camera and the optical fiber rotating clamps are respectively located on two opposite sides of the pigtail fixing device; the pigtail fixing device includes a fixing seat, a rotating wheel and a clamping plate, wherein the fixing seat is provided with a rotating wheel groove, the rotating wheel is located in the rotating wheel groove, and the clamping plate cover is pressed above the opening of the rotating wheel groove; a pigtail mounting hole is provided at the axis position of the rotating wheel, the pigtail mounting hole is exposed in the rotating wheel groove, a fastening bolt hole is provided on the peripheral wall of the rotating wheel, the fastening bolt hole is arranged in communication with the pigtail mounting hole, and a fastening bolt is installed in the fastening bolt hole; the CCD camera is arranged relative to the pigtail mounting hole. The polarization-maintaining dual-fiber pigtail alignment device of the present invention is convenient for alignment operation and can improve the accuracy of alignment.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber alignment equipment, and in particular to a polarization-maintaining dual optical fiber pigtail alignment equipment. Background Art

[0002] Polarization-maintaining fiber has a panda-eye stress rod to maintain the transmission of single polarized light through the fiber, which can well maintain the single polarization effect. Because the polarization-maintaining fiber is too thin and easy to crack, a capillary is needed to fix the polarization-maintaining fiber and make it into a pigtail, so as to facilitate the subsequent grinding of the fiber end face and the subsequent use of it with other glass devices (such as lenses). Figure 1 As shown, a common pigtail of a dual-fiber arrangement includes two polarization-maintaining fibers 1 and a capillary 2, wherein the polarization-maintaining fibers 1 are inserted into the capillary 2. The panda eyes of the two fibers in the pigtail can be arranged as required, for example, Figure 2 In the figure, the panda eyes 11 are arranged in parallel or vertically. When making the pigtail, since the panda eyes of the optical fiber cannot be observed with the naked eye, it is necessary to use a CCD camera or other equipment to magnify, observe and align them.

[0003] In existing alignment equipment, the fiber pigtail is usually fixed on a platform with tape, and the alignment is adjusted using a CCD camera. This method causes the fiber pigtail to move easily when the optical fiber is rotated, making it difficult for the CCD camera to observe the alignment, and the alignment is not accurate enough. Therefore, it is necessary to develop better alignment equipment. Summary of the invention

[0004] The main purpose of the present invention is to provide a polarization-maintaining dual-fiber pigtail alignment device which is convenient for alignment operation and can improve the alignment accuracy.

[0005] In order to achieve the above-mentioned purpose, the polarization-maintaining dual-fiber pigtail alignment equipment provided by the present invention includes a base, a CCD camera, a pigtail fixing device and two optical fiber rotation clamps, the CCD camera, the pigtail fixing device and the two optical fiber rotation clamps are all installed on the base, and the CCD camera and the optical fiber rotation clamps are respectively located on the opposite sides of the pigtail fixing device; the pigtail fixing device includes a fixing seat, a rotating wheel and a clamping plate, the fixing seat is provided with a rotating wheel groove, the rotating wheel is located in the rotating wheel groove, and the clamping plate cover is pressed above the opening of the rotating wheel groove; a pigtail mounting hole is provided at the axial position of the rotating wheel, the pigtail mounting hole is exposed in the rotating wheel groove, a fastening bolt hole is provided on the peripheral wall of the rotating wheel, the fastening bolt hole is arranged in communication with the pigtail mounting hole, and a fastening bolt is installed in the fastening bolt hole; the CCD camera is arranged opposite to the pigtail mounting hole.

[0006] It can be seen from the above scheme that the pigtail fixing device in the polarization-maintaining dual-fiber pigtail alignment device of the present invention cooperates with the fixing seat, the rotating wheel and the clamping plate to fix the pigtail, so that when the optical fiber is rotated, the stability of the pigtail can be guaranteed and the accuracy of the alignment can be improved. In addition, the roller is provided with a pigtail mounting hole for installing the pigtail, so that when installing the pigtail, the mounting wheel can be removed from the fixing seat first and then the pigtail can be fixed in the pigtail mounting hole, which can facilitate observation of the installation status and avoid the pigtail being crushed by the fastening bolts. At the same time, through the combination of the rotating wheel and the clamping plate, the circular surface of the pigtail is prevented from being broken due to collision during clamping, thereby improving the quality of the product.

[0007] In a further solution, one end of the clamping plate is hinged to the fixing seat.

[0008] It can be seen that the clamping plate is hinged to the fixing seat, which can facilitate the fixing operation of the rotating wheel.

[0009] In a further solution, the pigtail fixing device further includes an optical fiber flattening platform, and the optical fiber flattening platform is located between the rotating wheel and the optical fiber rotating clamp.

[0010] It can be seen that by setting up an optical fiber flat placement table, optical fiber bending can be avoided and rotation efficiency can be improved.

[0011] In a further solution, the pigtail fixing device further includes a three-dimensional adjustment frame, and the fixing seat is mounted on the three-dimensional adjustment frame.

[0012] It can be seen that by providing a three-dimensional adjustment frame, the position of the pigtail fixing device can be easily adjusted, so that the pigtail on the pigtail fixing device is aligned with the CCD camera, thereby improving the alignment accuracy.

[0013] In a further embodiment, the rotating wheel is made of a light-transmitting material.

[0014] It can be seen that the rotating wheel is made of light-transmitting material, which makes it easy to observe the fixation of the pigtail and the glue dispensing during glue dispensing, which is conducive to the solidification of the glue by light.

[0015] In a further solution, the optical fiber rotation clamp includes an optical fiber fixed turn block, an optical fiber pressure plate and a turn block bracket, and the optical fiber fixed turn block is rotatably mounted on the turn block bracket; the optical fiber fixed turn block is provided with an optical fiber groove that passes through the optical fiber fixed turn block along the axial direction, and the optical fiber pressure plate cover is pressed on the opening of the optical fiber groove.

[0016] It can be seen that the optical fiber rotation clamp fixes the optical fiber through the optical fiber fixing rotating block and rotates the optical fiber, which can improve the rotation accuracy. At the same time, the optical fiber groove is provided to improve the efficiency of optical fiber fixing.

[0017] In a further solution, a pad is provided on the optical fiber pressing plate, and the pad is arranged toward the optical fiber groove.

[0018] It can be seen that a cushion block is provided on the optical fiber pressure plate to prevent the optical fiber from being damaged due to excessive force.

[0019] In a further solution, the polarization-maintaining dual-fiber pigtail alignment device further includes a rotating fixture adjustment bracket, and the two optical fiber rotating fixtures are both mounted on the base through the rotating fixture adjustment bracket.

[0020] It can be seen that by providing the rotating clamp adjustment bracket, the position of the optical fiber rotating clamp can be easily adjusted.

[0021] In a further solution, the polarization-maintaining dual-fiber pigtail alignment device further includes a glue curing lamp, which is mounted on a base, and a lamp head of the glue curing lamp is arranged toward the rotating wheel.

[0022] It can be seen that by setting up a glue curing lamp, it is convenient to complete the alignment adjustment and glue dispensing, and then light-cured glue can be applied to the pigtail.

[0023] In a further solution, the polarization-maintaining dual-fiber pigtail alignment device also includes a microscope, which is mounted on a base and located above the rotating wheel.

[0024] This shows that by setting up a microscope and observing the dispensing situation, the alignment time can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of an existing dual-fiber pigtail.

[0026] Figure 2 This is the end face structure diagram of the existing dual-fiber pigtail.

[0027] Figure 3 It is a structural diagram of an embodiment of a polarization-maintaining dual-fiber pigtail alignment device of the present invention.

[0028] Figure 4 It is a structural diagram of a pigtail fixing device in an embodiment of the polarization-maintaining dual-fiber pigtail alignment device of the present invention.

[0029] Figure 5 It is a structural exploded view of a fixing seat, a rotating wheel and a clamping plate in an embodiment of a polarization-maintaining dual-fiber pigtail alignment device of the present invention.

[0030] Figure 6 It is a structural exploded view of a fixing seat in an embodiment of a polarization-maintaining dual-fiber pigtail alignment device of the present invention.

[0031] Figure 7 It is a structural cross-sectional view of a rotating wheel in an embodiment of a polarization-maintaining dual-fiber pigtail alignment device of the present invention.

[0032] Figure 8 It is a structural exploded view of the optical fiber rotation clamp in the embodiment of the polarization-maintaining dual optical fiber pigtail alignment device of the present invention.

[0033] Fig. 9 It is a structural diagram of the optical fiber pressing plate in an embodiment of the polarization-maintaining dual optical fiber pigtail alignment device of the present invention.

[0034] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0035] like Figure 3 As shown, in this embodiment, the polarization-maintaining dual-fiber pigtail alignment device includes a base 3, a CCD camera 4, a pigtail fixing device 5, two optical fiber rotation clamps 6 and a rotation clamp adjustment bracket 7. The CCD camera 4, the pigtail fixing device 5 and the two optical fiber rotation clamps 6 are all installed on the base 3, and the CCD camera 4 and the optical fiber rotation clamps 6 are respectively located on the opposite sides of the pigtail fixing device 5.

[0036] See also Figure 4 The pigtail fixing device 5 includes a fixing seat 51, a rotating wheel 52, a clamping plate 53, a fiber optic laying table 54 and a three-dimensional adjustment frame 55. The three-dimensional adjustment frame 55 is provided with a moving table 551. The position of the moving table 551 can be adjusted by adjusting knobs 552, 553 and 554. The moving table 551 is horizontally arranged. The fixing seat 51 and the fiber optic laying table 54 are both installed on the moving table 551. The fiber optic laying table 54 is located between the rotating wheel 52 and the fiber optic rotating clamp 6. The top surface of the fiber optic laying table 54 is in the same horizontal plane as the axis line of the rotating wheel 52.

[0037] See also Figure 5 and Figure 6 The fixed seat 51 is provided with a wheel groove 511, and the wheel 52 is located in the wheel groove 511. The two sides of the wheel groove 511 are respectively installed with fixing plates 512, and the fixing plates 512 cooperate with the wheel groove 511 to limit the position of the wheel 52. The clamping plate 53 covers the opening of the wheel groove 511 to fix the wheel 52. One end of the clamping plate 53 is hinged to the fixed seat 51, and the other end of the clamping plate 53 is connected to the fixed seat 51 through a buckle (not shown). In this embodiment, the buckle connects the clamping plate 53 and the fixed seat 51 through a first buckle hole 531 and a second buckle hole 513.

[0038] See also Figure 7 A pigtail mounting hole 521 is provided at the axis position of the rotating wheel 52, and the pigtail mounting hole 521 is exposed in the rotating wheel groove 511. In this embodiment, the fixing plate 512 is provided with a avoiding notch 5121, and the avoiding notch 5121 is arranged opposite to the pigtail mounting hole 521. A fastening bolt hole 522 is provided on the peripheral wall of the rotating wheel 52, and the fastening bolt hole 522 is communicated with the pigtail mounting hole 521. A fastening bolt 523 is installed in the fastening bolt hole 522, and the pigtail installed in the pigtail mounting hole 521 is fixed by the fastening bolt 523. In this embodiment, the fastening bolt 523 adopts a rubber head machine screw. Figure 3 It can be seen that the CCD camera 4 is arranged opposite to the pigtail mounting hole 521, which is convenient for focusing the pigtail. In this embodiment, the rotating wheel 52 is made of a light-transmitting material, which is convenient for observing the fixing of the pigtail and the glue dispensing during glue dispensing, and is conducive to light to solidify the glue.

[0039] See also Figure 8 The optical fiber rotating fixture 6 includes an optical fiber fixed rotating block 61, an optical fiber pressing plate 62 and a rotating block bracket 63. The optical fiber fixed rotating block 61 is rotatably mounted on the rotating block bracket 63. The rotating block bracket 63 is provided with a rotating block mounting hole 631. The optical fiber fixed rotating block 61 is provided with an optical fiber groove 611 that penetrates the optical fiber fixed rotating block 61 along the axial direction. The opening of the optical fiber groove 611 is from the axis of the optical fiber fixed rotating block 61 to the outer peripheral wall of the optical fiber fixed rotating block 61. A pressing platform 612 is provided at one end of the optical fiber fixed rotating block 61 facing the pigtail fixing device 5. One end of the optical fiber pressing plate 62 is hinged to the pressing platform 612. The optical fiber pressing plate 62 covers the opening of the optical fiber groove 611. The other end of the optical fiber pressing plate 62 is fastened to the pressing platform 612 through a fastening member (not shown). The optical fiber fixing rotating block 61 is provided with a limiting groove 613 on the outer peripheral wall of the rotating block mounting hole 631, and the rotating block bracket 63 is also provided with a limiting bolt hole 632, which is communicated with the rotating block mounting hole 631, and the limiting bolt hole 632 is arranged opposite to the limiting groove 613. The limiting bolt hole 632 is installed with a limiting bolt (not shown), and the limiting bolt is used to prevent the optical fiber fixing rotating block 61 from sliding out of the rotating block mounting hole 631 when rotating. A turntable 614 is provided at one end of the optical fiber fixing rotating block 61 away from the pigtail fixing device 5, which is used to rotate the optical fiber fixing rotating block 61.

[0040] See also Fig. 9 The optical fiber pressing plate 62 is provided with a cushion block 621, which is arranged toward the optical fiber groove 611. The cushion block 621 can press the optical fiber and prevent damage to the optical fiber. The cushion block 621 can be made of soft materials, such as soft glue, sponge, etc.

[0041] Depend on Figure 3It can be seen that the polarization-maintaining dual-fiber pigtail alignment device also includes a rotating clamp adjustment bracket 7, and the two optical fiber rotating clamps 6 are both mounted on the base 3 through the rotating clamp adjustment bracket 7. In this embodiment, the two optical fiber rotating clamps 6 can be adjusted in the vertical direction. The polarization-maintaining dual-fiber pigtail alignment device also includes a glue curing lamp 8, which is mounted on the base 3, and the lamp head of the glue curing lamp 8 is set toward the rotating wheel 52. The glue curing lamp 8 is used to cure the glue when dispensing glue to the pigtail. The type of the glue curing lamp 8 can be set as needed, for example, a pump lamp or a UV ultraviolet lamp or an LED lamp. In addition, the polarization-maintaining dual-fiber pigtail alignment device is also provided with a camera adjustment frame 41, and the CCD camera 4 is mounted on the base 3 through the camera adjustment frame 41. The camera adjustment frame 41 adopts a well-known two-dimensional adjustment frame, which can be adjusted forward, backward, left and right in the horizontal direction, and will not be repeated here. In order to make it more convenient for users to observe, the polarization-maintaining dual-fiber pigtail alignment device is also provided with a display 9, the CCD camera 4 is electrically connected to the display 9, the CCD camera 4 sends the pigtail end face image to the display 9, and the display 9 displays the optical fiber cat's eye alignment status.

[0042] In this embodiment, the polarization-maintaining dual-fiber pigtail alignment device further includes a microscope (not shown). The microscope is mounted on the base 3 and is located above the rotating wheel 52. The microscope is set to observe the dispensing situation.

[0043] When the polarization-maintaining dual-fiber pigtail alignment device of this embodiment is used, first, the CCD camera 4, the pigtail fixing device 5 and the optical fiber rotating clamp 6 are installed on the base 3. Then, the cleaned pigtail is inserted into the pigtail mounting hole 521 of the rotating wheel 52, the end face of the pigtail is aligned with the CCD camera 4, the fastening bolt 523 on the rotating wheel 52 is twisted to press the pigtail, and the clamping plate 53 is buckled to fix the mounting wheel 52. The distance between the lens of the CCD camera 4 and the end face of the pigtail is adjusted until the cat's eye image of the optical fiber is clearly seen. Then, manually rotate the optical fiber rotating clamp 6 to complete the alignment of the cat's eye direction of the polarization-maintaining optical fiber, and gently twist the limit bolt on the rotating block bracket 63 by hand so that the limit bolt fixes the optical fiber fixing rotating block 61, and at the same time, confirm whether the direction of the cat's eye changes. Under the observation of a microscope, the pigtail in the adjusted cat's eye direction is glued, and the glue curing lamp 8 is used to irradiate for 120 seconds. After curing, gently rotate the optical fiber rotating clamp 6 to see if the cat's eye is loose. After alignment is completed, the pigtail can be moved to the next workflow.

[0044] As can be seen from the above, the pigtail fixing device in the polarization-maintaining dual-fiber pigtail alignment device of the present invention cooperates with the fixing seat 51, the rotating wheel 52 and the clamping plate 53 to fix the pigtail, so that when the optical fiber is rotated, the stability of the pigtail can be guaranteed and the accuracy of alignment can be improved. In addition, the roller 52 is provided with a pigtail mounting hole 521 for installing the pigtail, so that when installing the pigtail, the mounting wheel 52 can be removed from the fixing seat 51 first and then the pigtail can be fixed in the pigtail mounting hole 521, which can facilitate observation of the installation status and avoid the pigtail being crushed by the fastening bolts. At the same time, through the combination of the rotating wheel 52 and the clamping plate 53, the circular surface of the pigtail is prevented from being broken due to collision during clamping, thereby improving the quality of the product.

[0045] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto, and any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A polarization-maintaining dual-fiber pigtail alignment device, characterized in that: It includes a base, a CCD camera, a pigtail fixing device and two optical fiber rotating clamps, wherein the CCD camera, the pigtail fixing device and the two optical fiber rotating clamps are all installed on the base, and the CCD camera and the optical fiber rotating clamps are respectively located on two opposite sides of the pigtail fixing device; The pigtail fixing device comprises a fixing seat, a rotating wheel, a clamping plate, an optical fiber flat-laying platform and a three-dimensional adjustment frame, wherein the fixing seat is provided with a rotating wheel groove, the rotating wheel is located in the rotating wheel groove, and the clamping plate cover is pressed above the opening of the rotating wheel groove; A pigtail mounting hole is provided at the axis center of the rotating wheel, the pigtail mounting hole is exposed in the rotating wheel groove, a fastening bolt hole is provided on the peripheral wall of the rotating wheel, the fastening bolt hole is communicated with the pigtail mounting hole, and a fastening bolt is installed in the fastening bolt hole; The CCD camera is arranged opposite to the pigtail installation hole; The optical fiber flattening platform is located between the rotating wheel and the optical fiber rotating fixture; The fixing seat is installed on the three-dimensional adjustment frame; The optical fiber rotating fixture comprises an optical fiber fixed rotating block, an optical fiber pressing plate and a rotating block bracket, and the optical fiber fixed rotating block is rotatably mounted on the rotating block bracket; The optical fiber fixing rotating block is provided with an optical fiber groove penetrating the optical fiber fixing rotating block along the axial direction, and the optical fiber pressing plate cover is pressed on the opening of the optical fiber groove.

2. The polarization-maintaining dual-fiber pigtail alignment device according to claim 1, characterized in that: One end of the clamping plate is hinged to the fixing seat.

3. The polarization-maintaining dual-fiber pigtail alignment device according to claim 1, characterized in that: The rotating wheel is made of light-transmitting material.

4. The polarization-maintaining dual-fiber pigtail alignment device according to any one of claims 1 to 3, characterized in that: A cushion block is disposed on the optical fiber pressing plate, and the cushion block is disposed toward the optical fiber groove.

5. The polarization-maintaining dual-fiber pigtail alignment device according to any one of claims 1 to 3, characterized in that: The polarization-maintaining dual-fiber pigtail alignment device further comprises a rotating fixture adjustment bracket, and two optical fiber rotating fixtures are both mounted on the base via the rotating fixture adjustment bracket.

6. The polarization-maintaining dual-fiber pigtail alignment device according to any one of claims 1 to 3, characterized in that: The polarization-maintaining dual-fiber pigtail alignment device further comprises a glue curing lamp, which is mounted on the base, and the lamp head of the glue curing lamp is arranged toward the rotating wheel.

7. The polarization-maintaining dual-fiber pigtail alignment device according to any one of claims 1 to 3, characterized in that: The polarization-maintaining dual-fiber pigtail alignment device also includes a microscope, which is mounted on the base and located above the rotating wheel.

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