Time average scanning digital holography

Kód výsledku v IS VaVaI

RIV/46747885:24220/18:00006186 - isvavai.cz

Výsledek na webu

https://www.researchgate.net/publication/326019327_Time_average_scanning_digital_holography

DOI - Digital Object Identifier

10.15240/tul/004/2018-1-004

Jazyk výsledku

angličtina

Název v původním jazyce

Time average scanning digital holography

Popis výsledku v původním jazyce

This paper presents a novel method for amplitude distribution measurement of harmonically oscillating objects called time average scanning digital holography (TASDH). Reconstructed intensity image from time averaged digital hologram has the form of a set of fringes that follow a zero-order Bessel function of the first kind. When the phase of light beam in the interferometer is modulated, the bright zero-order fringe shifts with respect to the modulation depth. The method is based on continuous shift of the zero-order fringe over the object surface and the value of vibration amplitude is evaluated independently in every single pixel. An advantageous feature of the proposed technique with respect to other digital holographic vibrometry methods is the ability to measure amplitudes of vibration without the risk of interference fringe order, or 2π, errors. On that account, the method allows to measure high slopes amplitudes distribution or discontinuous/partially shaded objects. The correctness of the method was experimentally verified by measuring the bending piezo actuator.

Název v anglickém jazyce

Time average scanning digital holography

Popis výsledku anglicky

This paper presents a novel method for amplitude distribution measurement of harmonically oscillating objects called time average scanning digital holography (TASDH). Reconstructed intensity image from time averaged digital hologram has the form of a set of fringes that follow a zero-order Bessel function of the first kind. When the phase of light beam in the interferometer is modulated, the bright zero-order fringe shifts with respect to the modulation depth. The method is based on continuous shift of the zero-order fringe over the object surface and the value of vibration amplitude is evaluated independently in every single pixel. An advantageous feature of the proposed technique with respect to other digital holographic vibrometry methods is the ability to measure amplitudes of vibration without the risk of interference fringe order, or 2π, errors. On that account, the method allows to measure high slopes amplitudes distribution or discontinuous/partially shaded objects. The correctness of the method was experimentally verified by measuring the bending piezo actuator.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

GA16-11965S: Adaptivní akustické metapovrchy pro aktivní řízení zvukového pole

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

ACC Journal

ISSN

1803-9782

e-ISSN

—

Svazek periodika

24

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

33-42

Kód UT WoS článku

—

EID výsledku v databázi Scopus

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