Kumar Manoj, Vijayakumar A, Rosen Joseph
Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 8410501, Israel.
Sci Rep. 2017 Sep 14;7(1):11555. doi: 10.1038/s41598-017-11731-x.
We present a lensless, interferenceless incoherent digital holography technique based on the principle of coded aperture correlation holography. The acquired digital hologram by this technique contains a three-dimensional image of some observed scene. Light diffracted by a point object (pinhole) is modulated using a random-like coded phase mask (CPM) and the intensity pattern is recorded and composed as a point spread hologram (PSH). A library of PSHs is created using the same CPM by moving the pinhole to all possible axial locations. Intensity diffracted through the same CPM from an object placed within the axial limits of the PSH library is recorded by a digital camera. The recorded intensity this time is composed as the object hologram. The image of the object at any axial plane is reconstructed by cross-correlating the object hologram with the corresponding component of the PSH library. The reconstruction noise attached to the image is suppressed by various methods. The reconstruction results of multiplane and thick objects by this technique are compared with regular lens-based imaging.
我们提出了一种基于编码孔径相关全息原理的无透镜、无干涉非相干数字全息技术。通过该技术获取的数字全息图包含某个观察场景的三维图像。由点物体（针孔）衍射的光使用类似随机的编码相位掩模（CPM）进行调制，强度图案被记录并组合成点扩展全息图（PSH）。通过将针孔移动到所有可能的轴向位置，使用相同的CPM创建一个PSH库。由放置在PSH库轴向范围内的物体通过相同CPM衍射的强度由数码相机记录。这次记录的强度被组合成物体全息图。通过将物体全息图与PSH库的相应组件进行互相关，重建物体在任何轴向平面的图像。通过各种方法抑制附加到图像上的重建噪声。将该技术对多平面和厚物体的重建结果与基于常规透镜的成像进行比较。
