在太赫兹频率上通过极化敏感计算成像绘制二元化映射
Optics letters
|July 1, 2025
概括
本研究介绍了一种高效的太赫兹 (THz) 成像系统,用于绘制木纤维二元化的图像. 该系统使用负担得起的组件进行有效的木粒检查,克服工业采用障碍.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 工程 工程师 工程师 工程师
背景情况:
- 太赫兹 (THz) 非破坏性评估 (NDE) 面临着由于高成本,组件脆弱性和漫长的采购时间而面临的工业采用挑战.
- 对木材等异性质材料的准确表征需要具有空间分辨率的极化敏感成像.
- 现有的THz成像系统往往缺乏工业应用所需的稳定性和效率.
研究的目的:
- 开发和演示一个高效的单像素太赫兹成像系统,用于空间绘制木材中异性纤维分布的二元化.
- 为工业用途提供一种成本效益高且强大的替代方案,而不是目前的THz NDE系统.
- 通过极化分辨率的THz成像来实现详细的木粒检查.
主要方法:
- 实现一个太赫兹单像素计算成像系统.
- 利用极化S周期哈达马德面具图案 (17x19) 来进行0.29THz光束的空间编码.
- 获取以极化分辨率的THz图像的松树木样本在各种亚齐木线旋转.
主要成果:
- 通过使用开发的THz成像系统,成功地绘制了木纤维二元化的空间映射.
- 展示耐用,廉价的组件和简单的光学对齐.
- 获取高效,极化分辨率的THz图像对于木质颗粒检查至关重要.
结论:
- 开发的THz单像素成像器为木材NDE提供了高效和成本效益的解决方案.
- 该系统实现了与传统THz时域光谱系统相美的二极化分析准确性.
- 这项技术解决了现有的THz检查系统的主要缺点,为工业采用铺平了道路.
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