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<p>To realize defect detection and locate the abnormal areas of optical components, we propose a high-sensitivity detection method based on the principle of digital holographic photoelasticity measurement. First, holograms are acquired before and after external force loading. Then, the complex amplitude is reconstructed, and the phase difference is calculated accordingly. Variables concerning birefringence are solved by obtaining multiple groups of holograms with different reference polarization directions and constructing a ratio function containing only the interference light intensity. Principal stress is calculated after external force loading. The proposed method can be applied to the detection of glass surface cracks, internal holes, and damage, and the reliability and performance of high-powered laser optical components can be guaranteed.</p>

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Stress Measurement and Defect Identification of Optical Components Based on Digital Holographic Photoelasticity

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月25日

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  • Dongyang Hu,
  • Qianru Zheng,
  • Chen Wang,
  • Xiangchao Zhang

摘要

To realize defect detection and locate the abnormal areas of optical components, we propose a high-sensitivity detection method based on the principle of digital holographic photoelasticity measurement. First, holograms are acquired before and after external force loading. Then, the complex amplitude is reconstructed, and the phase difference is calculated accordingly. Variables concerning birefringence are solved by obtaining multiple groups of holograms with different reference polarization directions and constructing a ratio function containing only the interference light intensity. Principal stress is calculated after external force loading. The proposed method can be applied to the detection of glass surface cracks, internal holes, and damage, and the reliability and performance of high-powered laser optical components can be guaranteed.