论文部分内容阅读
在分析数字全息系统的最小分辨距离和再现像平面上的采样间隔的基础上,提出了一种在用菲涅耳变换法再现数字全息图时,能清楚显示再现像细节的简单方法,这种方法能有效地提高再现场的显示分辨率。通过给由CCD记录的数字全息图补零,可使再现像平面上采样间隔减小,使再现像具有更多的像素,得到保留了更多记录信息的高质量再现像。用同样的方法,也可以矫正由于CCD靶面尺寸在水平和竖直方向上的不一致造成再现像的视觉畸变。实验结果表明此方法有很好的效果。
Based on the analysis of the minimum resolution distance of the digital holographic system and the sampling interval on the reconstructed image plane, a simple method of displaying the detail of the reproduced image clearly when reproducing the digital hologram by Fresnel transformation is proposed The method can effectively improve the display resolution of the reproduction field. By padding a digital hologram recorded by the CCD, the sampling interval on the reproduction image plane can be reduced so that the reproduction image has more pixels, resulting in a high-quality reproduction image retaining more recording information. In the same way, it is also possible to correct the visual distortion of the reproduced image due to the inconsistency of the size of the CCD target surface in the horizontal and vertical directions. The experimental results show that this method has a good effect.