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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F13%3A43919201" target="_blank" >RIV/49777513:23520/13:43919201 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1742-6596/415/1/012040" target="_blank" >http://dx.doi.org/10.1088/1742-6596/415/1/012040</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/415/1/012040" target="_blank" >10.1088/1742-6596/415/1/012040</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

Light propagation in a free space is a common computational task in many computer generated holography algorithms. A solution based on the 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 define properly interpolation filters that reconstruct continuous natureof the source area out of its sampled representation. It is also necessary to zero-pad properly source area sampling in order to avoid artifacts that stem from the periodic nature of the fast Fourier transform.

Název v anglickém jazyce

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

Popis výsledku anglicky

Light propagation in a free space is a common computational task in many computer generated holography algorithms. A solution based on the 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 define properly interpolation filters that reconstruct continuous natureof the source area out of its sampled representation. It is also necessary to zero-pad properly source area sampling in order to avoid artifacts that stem from the periodic nature of the fast Fourier transform.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

IN - Informatika

OECD FORD obor

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Projekt

<a href="/cs/project/LH12181" target="_blank" >LH12181: Vývoj algoritmů počítačové grafiky a pro CAD/CAM systémy Development of Algorithms for Computer Graphics and CAD/CAM systems</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physics: Conference Series

ISSN

1742-6588

e-ISSN

—

Svazek periodika

415

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000317123700040

EID výsledku v databázi Scopus

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