摘要
该文介绍了采用α–BBO双折射晶体透镜进行分光和光程差补偿方法,以及使用偏振相机进行单次采集的自干涉全息成像方法。该方法不需要使用额外器件补偿共轴干涉光路的光程差,适用于非相干白光照明情况下日常物体的全息图采集与图像重建。该文推导了再现距离与放大率等重要参数,并在此基础上,搭建了单发成像系统,还进行了实验验证。实验通过单次曝光采集了LED灯组的四幅不同偏振态全息图,并用四步相移法得到复振幅全息图,最后通过图像重建算法反演计算获得准确的再现图像。实验验证了基于α–BBO双折射晶体透镜的单次曝光自干涉全息成像方法的三维成像能力。
[Objective]This study aims to explore the use of self-interference holographic imaging technology to obtain holographic images of real-world objects,address safety concerns associated with laser illumination in traditional holographic imaging techniques,and improve imaging efficiency and quality.We address the problem of optical path difference compensation using a singleα-BBO birefringent crystal lens as a wavefront splitter and phase compensation device.We validate the feasibility of this approach in achieving fast three-dimensional imaging and assess its potential in capturing holographic images of complex objects and achieving three-dimensional imaging of everyday objects.[Methods]The self-interference holographic imaging system described in this paper employs a birefringent crystal lens for spectral splitting and uses a polarization camera with embedded micropolarization arrays to capture images,enabling image acquisition through a single exposure.To achieve higher imaging quality,relevant parameters of the imaging system are theoretically derived.In terms of optical path design,optical path compensation is achieved through a half-silvered mirror,a quarter-wave plate,mirrors,and a crystal lens to ensure that the optical paths for ordinary(o)and extraordinary(e)light are less than the coherence length,thus obtaining interference patterns.The feasibility of this method is experimentally verified.During the experiment,LED light sources are used for illumination,images are captured using a polarization camera,and the acquired holographic images are processed using image reconstruction algorithms to obtain final reconstructed images.[Results]The innovation of this study lies in proposing a method for rapid three-dimensional imaging using self-interference holographic imaging technology and addressing the problem of optical path difference compensation using a singleα-BBO birefringent crystal lens,thus avoiding the complexity and limitations associated with requiring additional compensation planes in traditional methods.Additionally,the study optimized the optical path design of the imaging system,suggesting the use of concave mirrors to achieve a more flexible system configuration,thereby further enhancing the performance and applicability of the imaging system.[Conclusions]This study demonstrates the feasibility of a self-interference holographic imaging system utilizing anα-BBO crystal lens for spectral separation,autonomous compensation of optical path differences,and single-shot imaging facilitated by a polarization camera.Moreover,the feasibility of the system in expedited three-dimensional imaging is validated.This technology not only enables real-time three-dimensional imaging of transparent live cells in the biomedical field but also facilitates morphology and curvature measurements of phase objects and defect detection in industrial inspection.In the realm of virtual and augmented reality,the development of self-interference digital holography opens up new possibilities for capturing more realistic and vivid images and videos from the real world.Furthermore,it serves as a reference and foundation for further improving holographic imaging techniques and enhancing imaging quality and efficiency.Future research can further explore the application potential of this technology in capturing holographic images of complex objects,achieving three-dimensional imaging of everyday objects,and further optimizing the design and performance of imaging systems to meet broader application requirements.
作者
许灿华
薛孔松
王雅婷
毛梦瑶
周田
曾志平
XU Canhua;XUE Kongsong;WANG Yating;MAO Mengyao;ZHOU Tian;ZENG Zhiping(College of Physics and Information Engineering,Fuzhou University,Fuzhou,350116,China)
出处
《实验技术与管理》
CAS
北大核心
2024年第8期88-95,共8页
Experimental Technology and Management
基金
福建省自然科学基金项目(2023J01396,2022J01546)
国家自然科学基金项目(61975032,61905041)。
关键词
自干涉全息
双折射晶体透镜
单发成像
光程差补偿
self-interference holography
birefringent crystal lens
single-shot imaging
optical path difference compensation
