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Nondestructive in situ detection of microbubble defects in the screen by optical coherence tomography

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Abstract

Touching screens as a key component of smart devices play a vital role in exerting normal function and user experience. Usually, defective products containing deep tiny cracks, impurities, or microbubbles generated in the manufacturing process are difficult to be detected by the present methods. The existence of such tiny defects potentially damages the integrated function of smart devices, even jeopardizes the health of users. The precise identification of microscopic defects buried in deep touching screens is great in demand. In this work, we built a spectral-domain optical coherence tomography (SD-OCT) system with suitable imaging depth and spatial resolution and carried out nondestructive imaging of endogenic micro-bubbles generated in the bonding process of the screen. Using SD-OCT, we obtained in situ 2D, 3D imaging of microbubbles to show quantitative information of the defects including exact size, shape, and spatial location, which help to analyze the occurring stage of bubble defects in the manufacturing process with improving accuracy. This provides a useful tool for the quality monitoring of the screen in industrial manufacture, which cannot be attainable by the common approaches.

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Acknowledgements

This work was partially supported by the National Natural Science Foundation of China (61875131); Shenzhen International Cooperation Project (GJHZ20180928161811821) and Shenzhen Basic Research Project (JCYJ20180305125549234).

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Authors and Affiliations

  1. Center for Biomedical Photonics and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China

    Zhigang Yang, Zhenyu Gu, Bing Liu, Dan Zhang, Liuying Wu, Jinying Wang, Jia Li, Wei Yan & Junle Qu

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  1. Zhigang Yang
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  2. Zhenyu Gu
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  3. Bing Liu
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  4. Dan Zhang
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  7. Jia Li
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Correspondence to Zhigang Yang.

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Yang, Z., Gu, Z., Liu, B. et al. Nondestructive in situ detection of microbubble defects in the screen by optical coherence tomography. Eur. Phys. J. Spec. Top. 231, 613–620 (2022). https://doi.org/10.1140/epjs/s11734-021-00384-7

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  • DOI: https://doi.org/10.1140/epjs/s11734-021-00384-7

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