We present a lensless, interferenceless incoherent digital holographytechnique based on the principle of coded aperture correlation holography. Theacquired digital hologram by this technique contains a three-dimensional imageof some observed scene. Light diffracted by a point object is modulated using arandom-like coded phase mask (CPM) and the intensity pattern is recorded andcomposed as a point spread hologram (PSH). A library of PSH is created usingthe same CPM by moving the pinhole to all possible axial locations. Intensitydiffracted through the same CPM from an object placed within the axial limitsof the PSH library is recorded by a digital camera. The recorded intensity thistime is composed as the object hologram. The image of the object at any axialplane is reconstructed by cross-correlating the object hologram with thecorresponding component of the PSH library. The reconstruction noise attachedto the image is suppressed by various methods. The reconstruction results ofmulti-plane and thick objects by this technique are compared with regularlens-based imaging.
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