Incoherent digital holograms acquired by interferenceless coded aperture correlation holography system without...

Area of Science:

• Optics and Photonics
• Digital Imaging
• Holography

Background:

• Traditional holography often requires complex optical setups and coherent light sources.
• Lens-based imaging systems can be bulky and may suffer from aberrations.
• Incoherent digital holography offers potential for simpler and more robust imaging systems.

Purpose of the Study:

• To develop and demonstrate a lensless, interferenceless, incoherent digital holography technique.
• To enable three-dimensional (3D) imaging of objects without conventional lenses.
• To compare the performance of the proposed technique with traditional lens-based imaging.

Main Methods:

• Utilizing coded aperture correlation holography principles.
• Employing a random-like coded phase mask (CPM) to modulate light from a point object, creating a point spread hologram (PSH).
• Generating a library of PSHs for various axial locations and reconstructing object images via cross-correlation.

Main Results:

• Successful acquisition of digital holograms containing 3D information of observed scenes.
• Reconstruction of object images at different axial planes through cross-correlation with the PSH library.
• Demonstration of noise suppression techniques for improved image quality.

Conclusions:

• The proposed lensless, interferenceless incoherent digital holography technique is effective for 3D imaging.
• The method shows promise for reconstructing multiplane and thick objects.
• Further comparison with lens-based imaging validates the potential of this approach.