A Method for Automatically Tracking the Central Axis of Optical Fiber Core Based on Image Recognition Technology
An automatic completion and fiber core technology, applied in the direction of cladding optical fiber, optics, light guide, etc., can solve the problems of poor repeatability, high cost, poor flexibility, etc., to achieve the effect of improving efficiency and repeatability, and reducing input costs
Active Publication Date: 2021-11-23
XUZHOU NORMAL UNIVERSITY
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Purpose of the invention: Aiming at the problems of poor flexibility, high cost and poor repeatability in the collimation of the existing grating track, the present invention proposes a method for automatically completing the tracking of the central axis of the fiber core based on image recognition technology
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0054] refer to figure 1 , this embodiment provides a method for automatically completing the tracking of the central axis of the fiber core based on image recognition technology. In this embodiment, a commercial silica single-mode fiber with a coating layer is used as an example for illustration. The method specifically includes Follow the steps below:
[0055] Step S1: Collimating the visible light imaging optical path in the femtosecond laser direct writing fiber grating preparation device, wherein the collimated visible light imaging optical path is specifically:
[0056] After the visible light beam passes through the focusing lens in the femtosecond laser direct writing fiber grating preparation device, it will enter the dichroic mirror. After passing through the high transparency of the dichroic mirror, it can be vertically incident on the center of the imaging chip of the CCD camera.
[0057] Step S2: After the visible light imaging optical path is collimated, open th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for automatically tracking the central axis of an optical fiber core based on image recognition technology, which specifically includes the following steps: S1: collimating the visible light imaging optical path in a femtosecond laser direct writing fiber grating preparation device; S2: Through the computer in the preparation device of femtosecond laser direct writing fiber Bragg grating, open the imaging software supporting the CCD camera, and start the real-time capture image mode of the preparation device of femtosecond laser direct writing fiber Bragg grating; S3: through the preparation device of femtosecond laser direct writing fiber Bragg grating , to obtain the imaging picture focused on the central axis of the optical fiber and the characteristic curve corresponding to the imaging picture; S4: According to the imaging picture and the characteristic curve, obtain the trajectory coordinates of the central axis of the optical fiber, and obtain the central axis trajectory of the fiber grating length to be engraved on the optical fiber. According to the nonlinear characteristics of the optical fiber track, the invention adopts the nonlinear tracking and alignment method, improves the efficiency and repeatability of the optical fiber grating preparation, and reduces the input cost at the same time.
Description
technical field [0001] The invention relates to the technical field of optical fiber Bragg grating tracing, in particular to a method for automatically completing optical fiber core central axis tracing based on image recognition technology. Background technique [0002] At present, the collimation of the grating track usually adopts the fixed-point and pulling fiber method and the two-point method. The former is to fix the optical fiber in the precision-processed D-type glass sleeve, wherein the D-type glass sleeve is fixed in position, and the incident laser beam is collimated into the fiber core in the D-type glass. A grating structure is formed in the core. This approach has already achieved fiber gratings as long as 50 mm. However, the incident beam needs to be incident from the normal of the D-shaped polished surface, and the inner diameter of the D-shaped glass sleeve used must completely match the outer diameter of the fiber. Fibers with different outer diameters n...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02
CPCG02B6/02152
Inventor 施进丹冯宪
Owner XUZHOU NORMAL UNIVERSITY