Add to Watchlist

Discrete calculation of the off-axis angular spectrum based light propagation

19 views

Citation of segment
Embed Code
Purchasing a DVD Cite video

Formal Metadata

Title Discrete calculation of the off-axis angular spectrum based light propagation
Title of Series The 9th International Symposium on Display Holography (ISDH 2012)
Part Number 22
Number of Parts 47
Author Lobaz, Petr
License CC Attribution - NoDerivatives 2.0 UK: England & Wales:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
DOI 10.5446/21041
Publisher River Valley TV
Release Date 2012
Language English

Content Metadata

Subject Area Computer Science
Abstract Light propagation in a free space is a common computational task in many computer generated holography algorithms. A solution based on angular spectrum decomposition is used frequently. However, its correct off-axis numerical implementation is not straightforward. It is shown that for long distance propagation it is necessary to use digital low-pass filtering for transfer function calculation in order to restrict source area illumination to a finite area. It is also shown that for short distance propagation it is necessary to introduce frequency bands folding in transfer function calculation in order to simulate finite source area propagation. In both cases it is necessary to properly define interpolation filters that reconstruct continuous nature of the source area out of its sampled representation. It is also necessary to properly zero-pad source area sampling in order to avoid artifacts that stem from the periodic nature of the fast Fourier transform.
Series
Loading...

For this video, no semantic annotations are available.

Semantic annotations are only provided—where legally permissible—for videos from the realms of technology/engineering, architecture, chemistry, information technology, mathematics, and physics.
Loading...
Feedback

Timings

  298 ms - page object

Version

AV-Portal 3.8.0 (dec2fe8b0ce2e718d55d6f23ab68f0b2424a1f3f)