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<p>The Scheimpflug imaging in the air can increase the depth-of-view and has been well studied with an accurate Scheimpflug imaging model. However, there is no corresponding underwater light-sheet Scheimpflug (ULSS) imaging model. As a result, imaging accuracy cannot be ensured in the design phase, which mainly relies on the post-calibration. In this paper, the ULSS imaging model is firstly established, which gives the relationship between the pixel number and target distance, as well as that between the target distance and range resolution. A new experimental bracket and an underwater Scheimflug imaging lens were designed and developed. Based on this new device, several experiments were carried out in a pool to study the range resolution of this ULSS LiDAR, by which the correctness of the imaging model was verified. It also shows that the newly designed ULSS LiDAR can achieve a millimeter-level resolution within 8 m.</p>

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Establishment and verification of theoretical model for underwater light-sheet Scheimpflug LiDAR system

  • 期刊论文

  • 发表日期：

    2024年12月31日

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  • Fei Feng,
  • Guojun Wu,
  • Bo Liu,
  • Xu Zhao,
  • Yafeng Wu,
  • Jinghan Xu

摘要

The Scheimpflug imaging in the air can increase the depth-of-view and has been well studied with an accurate Scheimpflug imaging model. However, there is no corresponding underwater light-sheet Scheimpflug (ULSS) imaging model. As a result, imaging accuracy cannot be ensured in the design phase, which mainly relies on the post-calibration. In this paper, the ULSS imaging model is firstly established, which gives the relationship between the pixel number and target distance, as well as that between the target distance and range resolution. A new experimental bracket and an underwater Scheimflug imaging lens were designed and developed. Based on this new device, several experiments were carried out in a pool to study the range resolution of this ULSS LiDAR, by which the correctness of the imaging model was verified. It also shows that the newly designed ULSS LiDAR can achieve a millimeter-level resolution within 8 m.