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通过对相移数字全息技术的理论分析,提出了一种适用于动态三维物体成像的全新的同步多路相移全息方法。此方法通过在自由空间连续产生90相位延迟的参考光束,与激光衍射透过物体后的光场进行干涉,利用四台相机构成的平衡探测器系统同时拍摄多帧干涉图像,根据菲涅耳衍射和傅里叶光学原理动态实时重现物体三维信息。模拟仿真和实验结果表明,该方法实现了单次相移数字全息技术,同步多路的采集可以用于动态物体的实时测量,大量同步多帧图像的获取提升了图像的质量。
Based on the theoretical analysis of phase-shift digital holography, a new synchronous multi-phase phase-shift holography method suitable for dynamic three-dimensional object imaging is proposed. In this method, a 90 ° phase-delayed reference beam is continuously generated in free space and interferes with a laser field diffracted through the object. A balanced detector system consisting of four cameras simultaneously captures multi-frame interference images, Diffraction and Fourier optics dynamically reproduce three-dimensional information of an object in real time. The results of simulation and experiment show that this method achieves single-phase digital holography. The acquisition of synchronous multi-channel can be used for real-time measurement of moving objects. The acquisition of a large number of synchronized multi-frame images enhances the image quality.