Optical fiber assembly equipment and method with cat eye angle recognition function

Abstract

The invention provides an optical fiber assembling device and method with a cat eye angle recognition function, the optical fiber assembling device comprises two rotating mechanisms, a laser device, a shooting device and a projection screen, each rotating mechanism comprises an optical fiber clamp and a rotation driving device, and a recognition irradiation position is arranged between the optical fiber clamps; the laser device and the projection screen are located on the two horizontal sides of the recognition irradiation position respectively, output laser of the laser device is output in the horizontal projection direction, the horizontal fiber distribution direction and the horizontal projection direction are not parallel, the output laser is projected to the projection screen after passing through the recognition irradiation position, and the shooting device shoots the projection screen. According to the scheme, light is emitted from the horizontal side face of the polarization maintaining optical fiber, the output laser of the laser device is projected to the projection screen after passing through the polarization maintaining optical fiber, then the side projection image on the projection screen is collected through the shooting device, the cat eye angle can be obtained through observation and visual imaging in cooperation with a software algorithm subsequently, and then welding of the single-mode optical fiber is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of optical devices, and in particular to an optical fiber assembly device and method with a cat's eye angle recognition function. Background Art

[0002] Polarization-maintaining optical fiber is developed to address polarization mode dispersion in optical fiber communications. It is based on the polarization phenomenon of light. Important parameters include polarization maintenance performance, loss, and birefringence. It is widely used in communications, sensors, and lasers.

[0003] Polarization-maintaining optical fiber is generally prepared by adding stress rods with two improved glass components on both sides of the core. Stress-type polarization-maintaining optical fiber mainly relies on the difference in thermal expansion coefficients between the embedded stress rods and the optical fiber core to generate thermal stress, which causes the refractive index of the material to change under the action of thermal stress, thereby producing a birefringence effect, and then achieving transmission in only one polarization direction.

[0004] Some existing product applications require the fusion splicing of the active fiber front end and the single-mode fiber. When assembling the product, it is necessary to know the cat's eye angle of the active fiber. The traditional method is to look into the cat's eye through the single-mode fiber from the axial end face and measure the angle. However, during fusion splicing, the cat's eye cannot be seen clearly due to the obstruction of the single-mode fiber on the axial side, and the cat's eye angle cannot be accurately measured, which in turn affects the fusion precision and fusion efficiency. Summary of the invention

[0005] The first object of the present invention is to provide an optical fiber assembly device with a cat's eye angle recognition function.

[0006] A second object of the present invention is to provide an assembling method of the above-mentioned optical fiber assembly equipment.

[0007] In order to achieve the first purpose of the present invention, the present invention provides an optical fiber assembly device with a cat's eye angle recognition function, comprising two rotating mechanisms, a laser device, a shooting device and a projection screen; the rotating mechanism comprises an optical fiber clamp and a rotating drive device, the two optical fiber clamps are arranged along the horizontal fiber laying direction, an identification irradiation position is arranged between the two optical fiber clamps, the rotating drive device is connected to the optical fiber clamp and drives the optical fiber clamp to rotate around the horizontal fiber laying direction; the laser device and the projection screen are respectively located on both horizontal sides of the identification irradiation position, the output laser of the laser device is output along the horizontal projection direction, the horizontal fiber laying direction and the horizontal projection direction are arranged non-parallel, the output laser is projected onto the projection screen after passing through the identification irradiation position, and the shooting device shoots the projection screen.

[0008] A further solution is that the optical fiber assembly equipment also includes a carrying clamp, which is located between the two optical fiber clamps, and the upper end surface of the carrying clamp is provided with a carrying groove, and the identification irradiation position is located at the edge of the carrying groove.

[0009] A further solution is that the bearing fixture is provided with vacuum adsorption holes on the bottom surface of the bearing groove.

[0010] A further solution is that the camera device and the laser device are located on the same horizontal side.

[0011] A further solution is that the optical fiber assembly equipment also includes a polarization-maintaining optical fiber, which is clamped and fixed by an optical fiber clamp. After the irradiation position of the polarization-maintaining optical fiber is identified, the output laser passes through the polarization-maintaining optical fiber and is projected onto the projection screen.

[0012] A further solution is that the optical fiber assembly equipment also includes single-mode optical fiber and polarization-maintaining optical fiber, the single-mode optical fiber and the polarization-maintaining optical fiber are respectively clamped and fixed by optical fiber clamps, and the polarization-maintaining optical fiber is fused after the end of the single-mode optical fiber and the end of the polarization-maintaining optical fiber are identified and irradiated.

[0013] In order to achieve the second object of the present invention, the present invention provides an optical fiber assembly method applied to the above scheme, Fiber optic assembly methods include: The single-mode optical fiber and the polarization-maintaining optical fiber are clamped and fixed by optical fiber clamps respectively; Pass the polarization-maintaining optical fiber through the identification irradiation position; The output laser of the laser device is projected onto the projection screen after passing through the polarization-maintaining fiber. Capturing the side projection image on the projection screen by means of a photographing device; The cat's eye position of the polarization-maintaining optical fiber is obtained according to the side projection image; The optical fiber clamp is rotated by a rotary drive device to fuse the single-mode optical fiber and the polarization-maintaining optical fiber at a preset position.

[0014] The beneficial effect of the present invention is that the present invention illuminates the horizontal side of the polarization-maintaining optical fiber, so that the output laser of the laser device is projected onto the projection screen after passing through the polarization-maintaining optical fiber, and then the side projection image on the projection screen is collected by the shooting device. The cat's eye angle can be obtained by observation, visual imaging and software algorithm, and then the cat's eye angle of the polarization-maintaining optical fiber can be measured before welding. If it does not meet the preset angle position, the optical fiber clamp can be rotated to rotate the single-mode optical fiber and the polarization-maintaining optical fiber to the preset position, and then the single-mode optical fiber can be welded. Furthermore, the end of the polarization-maintaining optical fiber can be supported and fixed at a position close to the identification irradiation position through the bearing groove and the vacuum adsorption hole, thereby improving the stability of identification and welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of an embodiment of the optical fiber assembly equipment of the present invention.

[0016] Figure 2 It is a structural diagram of an embodiment of the optical fiber assembly equipment of the present invention from another perspective.

[0017] Figure 3It is a structural diagram of an optical fiber assembly device embodiment of the present invention from a top view.

[0018] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0019] Figure 5 It is a measurement principle diagram of an embodiment of the optical fiber assembly equipment of the present invention.

[0020] Figure 6 It is the side projection image at different cat's eye angles.

[0021] Figure 7 It is an enlarged view of the optical fiber assembly device embodiment of the present invention after the optical fibers are arranged side by side.

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0023] Reference Figures 1 to 5 The optical fiber assembly equipment includes a base 11, two rotating mechanisms 2, a laser device 12, a shooting device 13 and a projection screen 14. The rotating mechanism 2 is arranged on the base 11. The rotating mechanism 2 includes an optical fiber clamp 21 and a rotating drive device. The two optical fiber clamps 21 are arranged along the horizontal fiber laying direction Y. An identification irradiation position 10 is arranged between the two optical fiber clamps 21. The rotating drive device is connected to the optical fiber clamp 21 and drives the optical fiber clamp 21 to rotate around the horizontal fiber laying direction Y. The specific structure of the rotating mechanism 2 can be found in the rotating optical fiber device of publication number CN222482457U. By clamping the end of the optical fiber on the optical fiber clamp 21 and placing the pigtail part on the reel 23 for fixing, the optical fiber can be accurately rotated.

[0024] The laser device 12 and the projection screen 14 are arranged on the base 11. The laser device 12 and the projection screen 14 are respectively located on the horizontal sides of the identification irradiation position 10. The shooting device 13 and the laser device 12 are located on the same horizontal side. The output laser of the laser device 12 is output along the horizontal projection direction X. The horizontal fiber laying direction Y and the horizontal projection direction X are arranged non-parallel. In this embodiment, the horizontal fiber laying direction Y is perpendicular to the horizontal projection direction X. The output laser passes through the identification irradiation position 10 and is projected onto the projection screen 14. The shooting device 13 shoots the projection screen 14.

[0025] The optical fiber assembly equipment also includes a supporting clamp 22, which is arranged on the base 11. The supporting clamp 22 is located between the two optical fiber clamps 21. The upper end surface of the supporting clamp 22 is provided with a supporting groove 221. The identification irradiation position 10 is located at the edge of the supporting groove 221. The supporting clamp 22 is provided with a vacuum adsorption hole on the bottom surface of the supporting groove 221. The vacuum adsorption hole can be connected to a vacuum generating device, and then negative pressure is generated at the vacuum adsorption hole, and then the optical fiber located on the supporting groove 221 can be adsorbed and fixed.

[0026] Reference Figure 4 , an optical fiber assembly method applied to the above optical fiber assembly equipment embodiment, the optical fiber assembly method includes the following steps.

[0027] First, the single-mode optical fiber 32 and the polarization-maintaining optical fiber 31 are clamped and fixed by the optical fiber clamps 21 on both sides, respectively, wherein the end of the polarization-maintaining optical fiber 31 is set on the supporting groove 221 of the supporting clamp 22, and the polarization-maintaining optical fiber 31 is located at the outermost fusion end through the identification irradiation position 10.

[0028] Subsequently, the output laser of the laser device 12 passes through the radial peripheral wall of the polarization-maintaining optical fiber 31, and then is refracted and projected onto the projection screen 14, forming a projection screen 14 as shown in FIG. Figure 6 The side projection image shown, Figure 6 The side projection images are shown at different cat's eye angles of 0°, 30°, 60° and 90°. Figure 6 Only four angles are shown. In actual applications, side projection images corresponding to different cat's eye angles can be collected in advance, and the angular resolution can be 1°, 0.5° or 0.1°.

[0029] Then, the side projection image on the projection screen 14 is collected by the shooting device 13 , and the cat's eye position of the polarization-maintaining optical fiber 31 can be obtained by comparing the side projection image with the visual imaging and software algorithm.

[0030] If the cat's eye angle meets the preset angle, the single-mode optical fiber 32 and the polarization-maintaining optical fiber 31 can be fused. If the cat's eye angle does not meet the preset angle, the optical fiber clamp 21 is rotated by the rotary drive device to rotate the single-mode optical fiber 32 and the polarization-maintaining optical fiber 31 to the preset position, and then the two are fused.

[0031] Finally, refer to Figure 7 , the remaining three common optical fibers are arranged in the bearing groove 221 and fixed by adsorption, and then the four optical fibers are combined together by adhesive bonding to complete the assembly of the product. As can be seen from the above, in this case, lighting is applied from the horizontal side of the polarization-maintaining optical fiber, so that the output laser of the laser device is projected onto the projection screen after passing through the polarization-maintaining optical fiber, and then the side projection image on the projection screen is collected by the shooting device. Subsequently, the cat's eye angle can be obtained through observation, visual imaging and software algorithm, which is convenient for fusing single-mode optical fibers.

Claims

1. An optical fiber assembly device with cat's eye angle recognition function, characterized in that: It includes two rotating mechanisms, laser device, camera device and projection screen; The rotating mechanism comprises an optical fiber clamp and a rotating drive device, wherein two optical fiber clamps are arranged along a horizontal fiber laying direction, an identification irradiation position is provided between the two optical fiber clamps, and the rotating drive device is connected to the optical fiber clamp and drives the optical fiber clamp to rotate around the horizontal fiber laying direction; The laser device and the projection screen are respectively located on two horizontal sides of the identification irradiation position, the output laser of the laser device is output along the horizontal projection direction, the horizontal fiber laying direction and the horizontal projection direction are arranged non-parallel, the output laser passes through the identification irradiation position and is projected onto the projection screen, and the shooting device shoots the projection screen.

2. The optical fiber assembly device according to claim 1, characterized in that: The optical fiber assembly device further comprises a carrying fixture, wherein the carrying fixture is located between the two optical fiber fixtures, and a carrying groove is provided on the upper end surface of the carrying fixture, and the identification irradiation position is located at the edge of the carrying groove.

3. The optical fiber assembly device according to claim 2, characterized in that: The carrying fixture is provided with vacuum adsorption holes on the bottom surface of the carrying groove.

4. The optical fiber assembly device according to claim 1, characterized in that: The photographing device and the laser device are located on the same horizontal side.

5. The optical fiber assembly device according to any one of claims 1 to 4, characterized in that: The optical fiber assembly equipment also includes a polarization-maintaining optical fiber, which is clamped and fixed by the optical fiber clamp. The polarization-maintaining optical fiber passes through the identification irradiation position, and the output laser passes through the polarization-maintaining optical fiber and is projected onto the projection screen.

6. The optical fiber assembly device according to any one of claims 1 to 4, characterized in that: The optical fiber assembly equipment also includes a single-mode optical fiber and a polarization-maintaining optical fiber. The single-mode optical fiber and the polarization-maintaining optical fiber are respectively clamped and fixed by the optical fiber clamp. The polarization-maintaining optical fiber passes through the identification irradiation position, and the end of the single-mode optical fiber and the end of the polarization-maintaining optical fiber are fused.

7. The optical fiber assembly method applied to the optical fiber assembly device according to any one of claims 1 to 4, characterized in that: The optical fiber assembly method comprises: The single-mode optical fiber and the polarization-maintaining optical fiber are clamped and fixed by the optical fiber clamps respectively; Passing the polarization-maintaining optical fiber through the identification irradiation position; The output laser of the laser device is projected onto the projection screen after passing through the polarization-maintaining optical fiber. Acquiring the side projection image on the projection screen by the shooting device; Obtaining the cat's eye position of the polarization-maintaining optical fiber according to the side projection image; The optical fiber clamp is rotated by the rotary drive device to fuse the single-mode optical fiber and the polarization-maintaining optical fiber at a preset position.

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