Detection of blemish for fiber-optic imaging elements

Jiao, Peng; Jia, Jinsheng; Fu, Yang; Zhang, Lei; Wang, Yun; Wang, Jiuwang; Zhou, You; Shi, Peng; Zhao, Ran; Huang, Yonggang

doi:10.1117/1.oe.59.5.053105

Cited by 7 publications

(4 citation statements)

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“…Commonly, the microscopic images of OFM can be treated as 2D Gaussian function array distributions [2,18], as shown in Figure 2a, where the diameter ratio of core glass and cladding glass is set to 5:1. Figure 2b illustrates the deformed image generated by the image spherizing algorithm and the loading angle α = 0.15 rad ≈ 8.599 • .…”

Section: Simulated Results and Analysismentioning

confidence: 99%

“…Optical fiber material (OFM), such as fiber-optic plate (FOP), fiber-optic inverter(FOI), and micro-channel plate (MCP) are mainly used to prepare photomultiplier devices that have been extensively applied in the fields of low-light night vision, electronics, aerospace and other fields [1][2][3]. However, during the course of service and production, the surface of OFM will become deformed due to physical or chemical processes such as polishing, acid etching, and hydrogen reduction.…”

Section: Introductionmentioning

confidence: 99%

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Correlation-Based Out-of-Plane Displacement Measurement for Optical Fiber Material

Zhao

Sun

et al. 2021

Photonics

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Due to the monitoring requirement of optical fiber industrial production, an out-of-plane displacement measurement method is proposed. Firstly, the in-plane displacements between two consecutive images, captured through a microscope with a CCD camera, are estimated by the Digital Speckle Correlation Method (DSCM). Subsequently, the out-of-plane displacement of optical fiber material can be obtained by the wedge model. Finally, the effectiveness of the method is verified experimentally by comparing the measurement data of routine practice with its theoretical values. Simulation and experimental results indicate that the absolute errors and the relative errors of the measurement by the optical microscope with a magnification of 50× are less than ±0.2 μm and 5%, respectively. The new method only needs two images obtained by the microscopic imaging system with a single camera to accomplish the measurement, which can significantly reduce the measurement time and complexity of the arrangement. Further, the method needs neither frequency domain conversion nor phase unwrapping operation, therefore, it is especially suitable for dynamic out-of-plane displacement measurement. The proposed method has been applied to the industrial uniformity and micro–nano-scale deformation monitoring of optical fiber image transmission materials.

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Section: Simulated Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation-Based Out-of-Plane Displacement Measurement for Optical Fiber Material

Zhao

Sun

et al. 2021

Photonics

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“…TOFA has been prepared by optical fiber drawing, hot pressing molding, high temperature stretching molding and optical processing. The detailed preparation process can refer to the literature [8]. Each optical fiber in TOFAs is composed of core glass with high refractive index and clad glass with low refractive index.…”

Section: Procedures Of the Experiments 21 Preparation Of Tofamentioning

confidence: 99%

Coupling resolution of tapered optical fiber array and CCD

Huang

Jiao

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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“…For glass or quartz optical fiber products, such as a fiber image inverter and microchannel plate, micro-nano-scale deformation will seriously affect their key performances and bring a potential risk of security [1,2]. Therefore, deformation detection of these materials is always an important research topic in industrial production, and the key to detection is the three-dimensional (i.e., in-plane and out-of-plane) displacement measurement.…”

Section: Introductionmentioning

confidence: 99%

Image Spherizing-Based Three-Dimensional Displacement Measurement Technique for Microscope with Single Camera

Zhao

Li²,

Sun

et al. 2022

Photonics

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The detection of three-dimensional displacement, caused by micro-nano scale deformation, is of great significance for the industrial production of glass or quartz optical fiber products. Considering the detection cost and practicability, an image spherizing-based three-dimensional displacement measurement method for a monocular microscopic imaging system (a microscope with a normal industrial camera) is proposed. Differential theory tells us that an arbitrary large-scale deformation can be approximatively considered as the sum of slope-shaped deformations. In this paper, an ordinary slope model is presented by the idea of image spherizing and differential theory, which reveals the mathematical relation between in-plane displacement and out-of-plane displacement in the deformed images captured by an optical microscope. After obtaining the in-plane displacement field, the out-of-plane displacement field can be extracted from the in-plane displacement field by the ordinary slope model, which indicates that the out-of-plane displacement information carried by the in-plane displacement is fully utilized. Simulation and application experiments are performed to demonstrate the effectiveness and all the absolute errors of the measurement by optical microscope with a magnification of 50× are less than 0.2 μm. Unlike conventional methods, the new method does not need a phase unwrapping process during detection and has many attractive characteristics such as low-cost, simple arrangements and good applicability. Because the measurement precision of this technique can meet the detection requirement, it has been applied to the industrial detection of glass or quartz optical fiber products.

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Detection of blemish for fiber-optic imaging elements

Cited by 7 publications

References 0 publications

Correlation-Based Out-of-Plane Displacement Measurement for Optical Fiber Material

Correlation-Based Out-of-Plane Displacement Measurement for Optical Fiber Material

Coupling resolution of tapered optical fiber array and CCD

Image Spherizing-Based Three-Dimensional Displacement Measurement Technique for Microscope with Single Camera

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