scholarly journals Fast focus estimation using frequency analysis in digital holography

2014 ◽  
Vol 22 (23) ◽  
pp. 28926 ◽  
Author(s):  
Seungtaik Oh ◽  
Chi-Young Hwang ◽  
Il Kwon Jeong ◽  
Sung-Keun Lee ◽  
Jae-Hyeung Park
Keyword(s):  
Frequency Analysis ◽  
Digital Holography

scholarly journals Providing a Visual Understanding of Holography Through Phase Space Representations

2020 ◽  
Vol 10 (14) ◽  
pp. 4766
Author(s):  
Tobias Birnbaum ◽  
Tomasz Kozacki ◽  
Peter Schelkens
Keyword(s):  
Phase Space ◽  
Frequency Analysis ◽  
Digital Holography ◽  
Joint Space ◽  
Visual Interpretation ◽  
Spatial Frequencies ◽  
Digital Holograms ◽  
Spatial Coordinates ◽  
Visual Understanding ◽  
Space Frequency

Digital holograms are a prime example for signals, which are best understood in phase space—the joint space of spatial coordinates and spatial frequencies. Many characteristics, as well as optical operations can be visualized therein with so called phase space representations (PSRs). However, literature relies often only on symbolic PSRs or on, in practice, visually insufficient PSRs like the Wigner–Ville representation. In this tutorial-style paper, we will showcase the S-method, which is both a PSR that can be calculated directly from any given signal, and that allows for a clear visual interpretation. We will highlight the power of space-frequency analysis in digital holography, explain why this specific PSR is recommended, discuss a broad range of basic operations, and briefly overview several interesting practical questions in digital holography.

Frequency analysis of digital holography

2002 ◽  
Vol 41 (4) ◽  
pp. 771 ◽  
Author(s):  
Thomas M. Kreis
Keyword(s):  
Frequency Analysis ◽  
Digital Holography
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