A three-dimensional structure detection method of optical fiber splicing point based on digital holographic tomography

A technology of digital holography and three-dimensional structure, which is applied in the testing of machine/structural components, optical instrument testing, measuring devices, etc., to achieve the effect of simple algorithm operation, simple calculation process and high precision

Active Publication Date: 2019-09-03
深圳市前海誉卓科技有限公司
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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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  • A three-dimensional structure detection method of optical fiber splicing point based on digital holographic tomography

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[0041] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0042]The present invention is a three-dimensional structure detection method of optical fiber fusion points based on digital holographic tomography. Firstly, the holograms of the optical fiber fusion points at various angles are obtained through the off-axis digital holographic optical path. The axial error is corrected by selecting different reproduction distances to obtain accurate phase images of the optical fiber at various angles; then the lateral error, longitudinal error, and image tilt correction are performed on the phase images at each angle, and finally the optical fiber fusion splice is obtained by using the tomographic filter back projection algorithm The three-dimensional structure of a point includes the following steps:

[0043] In the first step, the off-axis digital holography system is used to record the holograms of the spliced ​​...

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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 the fusion splicing point of an optical fiber based on digital holographic tomography, which can be used for detecting the three-dimensional structure of the fusion splicing point of different optical fibers using the digital holographic tomography technology. Background technique [0002] Fiber optics and fiber optic devices are playing an increasingly important role in the fields of telecommunications, industry, and medicine. The reliability requirements for fiber optic applications are getting higher and higher, and fiber optic fusion directly determines the reliability of fiber optics. At present, the commonly used method of detecting optical fiber splicing is the optical time domain detection method of detecting optical power, but this method cannot directly display the three-dimensional structure of optical fiber splicing, the detection signal is single, and there i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/00G01N21/84
Inventor 潘锋肖文邓雅婷马希超
Owner 深圳市前海誉卓科技有限公司
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