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| 基于单模光纤分束器的夏克–哈特曼波前传感器校准的方法 |
| Experimental study on calibration of Shack-Hartmann wavefront sensors using single mode fiber beam splitter |
| 投稿时间：2024-01-29 |
| DOI：10.3969/j.issn.1005-5630.202401290016 |
| 中文关键词: 夏克–哈特曼波前传感器 波前校准 波前像差 |
| 英文关键词:Shack-Hartmann wavefront sensor wavefront calibration wavefront aberration |
| 基金项目:国家自然科学基金(61875123) |
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| 中文摘要: |
| 提出了一种基于单模光纤分束器的夏克–哈特曼波前传感器校准方法，通过单模光纤耦合实现了平行光束和传感器的精确对准，从而能获得更加接近微透镜光轴物理位置的标准质心。介绍了校准的实验装置和校准方法，采用11个不同半径的球面波进行了实验验证，并对测量结果和误差进行了对比分析。结果表明，分别采用常规方法和本文方法校准后，波前重建峰谷值的平均偏差由1.024λ降低到0.667λ，波前均方根值由0.136λ降低到0.033λ，说明本文校准方法有助于提升重建精度。 |
| 英文摘要: |
| A calibration method of Shack-Hartmann wavefront sensor based on single-mode fiber beam splitter is proposed in this paper. The parallel beam and sensor were precisely aligned through single-mode fiber coupling to make the standard centroids of spot array closer to the physical position of the optical axis of the micro-lenses. The calibration setup and calibrating procedure were introduced. And 11 spherical waves with different radius of curvatures were used to verify the calibration accuracy. The experiment results and errors were compared. The results showed that compared with the conventional calibrating method by using plane wave, the average deviation of reconstructed wavefront peak to valley value with proposed method was reduced from 1.024λ to 0.667λ, and the root mean square value was reduced from 0.136λ to 0.033λ, which demonstrated that the proposed method significantly improves the reconstruction accuracy. |
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