基于希尔伯特相衬成像的空间光调制器波前检测  

Wavefront Sensing for Spatial Light Modulator by Hilbert Phase-Contrast Imaging

作　　者：陈直 曾敏 Chen Zhi;Zeng Min(School of Communication and Information Engineering,Shanghai Technical Institute of Electronics and Information,Shanghai 201411,China)

机构地区：[1]上海电子信息职业技术学院通信与信息工程学院,上海201411

出　　处：《应用激光》2024年第9期105-112,共8页Applied Laser

基　　金：上海电子信息职业技术学院引进人才科研启动项目(B3-002-21-SYLZP07-0204)。

摘　　要：作为一种广泛应用于光学领域的调制器件,空间光调制器具有较大的调制自由度,能够产生较为复杂的波前,因而需要较为精确的波前检测技术。基于希尔伯特相衬成像,实现一种检测空间光调制器波前的技术。该技术应用希尔伯特变换把复信号分析引入波前检测,有效地保留空间高频信息,从而定量实现较高准确度的波前成像。实验表明,基于希尔伯特相衬成像的空间光调制器波前检测技术能够有效地检测由空间光调制器产生的复杂波前,对由40个不同相位区域组成的波前检测平均误差小于1%,实现了较好的相位衬度,有望应用于散射成像、全息成像、光束转弯、激光整形、粒子光镊等有赖于空间光调制器的研究领域中。Spatial light modulators(SLMs),extensively utilized in the optical field,offer substantial modulation flexibility and the capacity to generate complex wavefronts,necessitating precise wavefront sensing techniques.This study introduces a wavefront sensing technology for SLMs based on Hilbert phase-contrast imaging.This technology utilizes the Hilbert transform to introduce complex signal analysis into wavefront sensing,effectively preserving the high spatial frequency information and realizing the quantitative phase-contrast imaging with high accuracy.The experiments show that the spatial light modulator wavefront sensing technology based on Hilbert phase-contrast imaging can effectively detect the complex wavefront generated by the spatial light modulator.The average wavefront sensing error is less than 1%for 40 different phase regions,achieving a well phase contrast.The proposed technology is expected to be applied in research fields that depend on spatial light modulators,such as scattering imaging,holographic imaging,beam turning,laser shaping,and optical tweezers.

关 键 词：希尔伯特变换 相衬成像 空间光调制器 波前检测 

分 类 号：TN256[电子电信—物理电子学]