根据超分辨成像理论, 提出了一种基于光束扫描的超分辨数字全息记录与再现技术。用菲涅耳衍射理论证明了该技术可有效增大CCD探测器的等效尺寸和系统截止频率, 从而提高数字全息成像分辨率。计算机仿真验证了该方法的正确性与可行性。对光束扫描全息记录系统进行了详细描述, 对该数字全息术的再现方法进行了具体说明。对比合成孔径数字全息术, 该技术在全息记录中无需反复移动CCD探测器, 也不必反复调整参考光以避免出现欠采样。

Based on super-resolution imaging theory, a beam scanning super-resolution digital holographic technique is proposed. Applying Fresnel diffraction theory, this technique is proved to enlarge the equivalent dimension of CCD and increase the cutoff frequency of optical system, so this method can improve the imaging resolution of digital holography. The simulation verify the validity and feasibility of this method. The method of hologram processing and reconstruction is summarized. Compared with synthetic-aperture digital holography, the proposed technique needs not to move CCD camera and change the angle of reference waves that correspond to different CCD camera position for avoiding under-sampling.