Fiber welding point three dimensional structure detection method based on digital holographic tomography

Abstract

The invention discloses a three dimensional structure detection method of a fiber welding point, based on digital holographic tomography. Based on the digital holographic tomography technology, the fiber welding point three dimensional structure detection method based on digital holographic tomography performs digital reconstruction and correction of axial error on the fiber welding point hologram which is obtained through measurement of the digital holographic technology, by taking different reproduced distances, so as to obtain the phase diagrams of the welding fiber under each angle, and then performs horizontal correction, vertical correction and image inclination correction of rotation deviation on each phase diagram to obtain the phase diagrams that the positions of the fiber welding points are consistent under each angle, and finally utilizes the tomography back projection filtering algorithm to reconstruct the three dimensional structure of the fiber welding points. The three dimensional structure detection method of a fiber welding point, based on digital holographic tomography can realize correction of the rotation deviation as the data processing process is fully digitalized, has the advantages of high precision, no damage and three dimensional quantitative determination, and can be used for detecting the quality of fiber welding, based on the digital holographic tomography technology.

Description

Technical field [0001] The invention relates to a method for detecting the three-dimensional structure of optical fiber fusion splicing points based on digital holographic tomography, which can be used for the digital holographic tomography technique to detect the three-dimensional structure detection of fusion splicing points of different optical fibers after fusion splicing. Background technique [0002] Optical fibers and optical fiber devices are playing an increasingly important role in the fields of telecommunications, industry, and medicine. In the process of optical fiber applications, the requirements for their reliability are getting higher and higher, and fiber fusion splicing directly determines the reliability of optical fibers. At present, the commonly used method to detect optical fiber splicing is the optical time domain detection method of detecting optical power, but this method cannot visually display the three-dimensional structure of optical fiber splicing, th...

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Problems solved by technology

[0004] In order to solve the problem of detecting the three-dimensional structure of the optical fiber fusion point, the present invention proposes a method for detecting the three-dimensional structure of the optical fiber fusion point based on digital holographic tomography

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