Lensless digital holography (LDH) is gaining considerable attention lately due to a simple experimental setup, wide field-of-view, and three-dimensional (3D) imaging capability. Since the resolution of LDH is limited by the Nyquist frequency of a detector array, the major drawback of LDH is resolution, and a lot of efforts were made to enhance the resolution of LDH. Here we propose and demonstrate a fast noniterative sub-pixel shifting super-resolution technique that can effectively enhance the resolution of LDH by a factor of two. We provide detailed frequency-domain formulae for our noniterative frequency-domain super-resolution method. The validity of our proposed method is experimentally demonstrated both for scattering and phase objects.
|Number of pages||11|
|Publication status||Published - 2021 Sept 13|
Bibliographical noteFunding Information:
Funding. Korea Institute for Advancement of Technology (KIAT), and the Swiss Innovation Agency (Innosuisse) through S.Korea–Switzerland Joint Innovation Project (P0011925); National Research Foundation of Korea (NRF) through the Basic Science Program (2019R1A4A1025958, 2021R1A2C2009090).
© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics