罗诗淇, 刘京宙, 陈炫辉, 谢向生. 散斑自相关分辨率测量和修正[J]. 应用光学, 2023, 44(2): 398-405. DOI: 10.5768/JAO202344.0203006
引用本文: 罗诗淇, 刘京宙, 陈炫辉, 谢向生. 散斑自相关分辨率测量和修正[J]. 应用光学, 2023, 44(2): 398-405. DOI: 10.5768/JAO202344.0203006
LUO Shiqi, LIU Jingzhou, CHEN Xuanhui, XIE Xiangsheng. Speckle autocorrelation resolution measurement and correction[J]. Journal of Applied Optics, 2023, 44(2): 398-405. DOI: 10.5768/JAO202344.0203006
Citation: LUO Shiqi, LIU Jingzhou, CHEN Xuanhui, XIE Xiangsheng. Speckle autocorrelation resolution measurement and correction[J]. Journal of Applied Optics, 2023, 44(2): 398-405. DOI: 10.5768/JAO202344.0203006

散斑自相关分辨率测量和修正

Speckle autocorrelation resolution measurement and correction

  • 摘要: 散斑相关是许多基于散斑的光学测量和成像技术的基础,决定了光学系统的分辨率。当前散斑尺寸(颗粒度或分辨率)的理论描述不够精确,也缺乏实验验证。探究了散斑图样自相关尺寸的影响因素,与相同数值孔径物镜聚焦进行比对,揭示薄散射介质的“散射透镜”性质。通过散斑自相关和透镜聚焦尺寸的多组测量,结果表明,截趾函数会影响其分辨率,需要根据具体光路对阿贝判据做修正。对基于散斑的测量和成像技术具有一定的参考价值。

     

    Abstract: Speckle correlation is the basis of speckle-based optical measurements and imaging recovery technologies, which determines the resolution of the opitcal system. At present, the theoretical description of speckle size (granularity or resolution) is not accurate enough and lacks of experimental verification. The influencing factors of speckle pattern autocorrelation size were explored, compared it with the same numerical aperture objective, and the scattering lens properties of thin scattering medium were revealed. Through the multiple sets of measurements for speckle autocorrelation and lens focusing size, the results show that the apodization function will affect the resolution, and the Abbe criterion needs to be corrected according to the specific optical path, which has a certain reference value for speckle-based measurement and imaging technology.

     

/

返回文章
返回