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10 October 2020 Band-extended angular spectrum method for resolution-enhanced digital holography
Wenhui Zhang, Hao Zhang, Guofan Jin
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Proceedings Volume 11551, Holography, Diffractive Optics, and Applications X; 115510O (2020) https://doi.org/10.1117/12.2573451
Event: SPIE/COS Photonics Asia, 2020, Online Only
Abstract
We have proposed a band-extended angular spectrum method (BEASM) for the accurate and efficient diffraction calculation. The proposed BEASM has been used for a resolution-enhanced digital holographic imaging. By rearranging the sampling points of the transfer function in the spatial frequency domain according to the sampling theorem, more effective object spectrum can be transferred during the diffraction calculation which is the key of the numerical reconstruction in digital holography. Therefore, higher resolution imaging has been achieved thanks to the extension of the computational bandwidth. Both numerical simulation and optical experiments have been carried out to validate the proposed method.
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Wenhui Zhang, Hao Zhang, and Guofan Jin "Band-extended angular spectrum method for resolution-enhanced digital holography", Proc. SPIE 11551, Holography, Diffractive Optics, and Applications X, 115510O (10 October 2020); https://doi.org/10.1117/12.2573451
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KEYWORDS
Digital holography
Optical recording
Holography
Image resolution
Process modeling
Spherical lenses
Computational imaging
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