Pixel-wise Amplitude Distribution Evaluation in Time Average Digital Holography

Kód výsledku v IS VaVaI

RIV/46747885:24220/18:00006187 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1088/1742-6596/1149/1/012033

DOI - Digital Object Identifier

10.1088/1742-6596/1149/1/012033

Jazyk výsledku

angličtina

Název v původním jazyce

Pixel-wise Amplitude Distribution Evaluation in Time Average Digital Holography

Popis výsledku v původním jazyce

This article introduces a new holographic method for harmonic vibration measurement. The method called time average sweeping digital holography (TASDH) is based on the continuous shift of fringe pattern described by Bessel function over the object surface. The shift is done by phase modulation in one arm of holographic interferometer. Such temporal phase sweeping allows for evaluation of the vibration amplitude value independently in each pixel by application of intensity values cross-correlation of steady state and oscillating object. Main advantage of proposed technique with respect to other methods of digital holographic vibration is its ability to measure the amplitude of vibration without the risk of interference order mismatch. Thanks to above mentioned properties, the method allows measurement of amplitude modes with high slopes or discontinuous surfaces as well as partially shaded objects. The method was experimentally tested by measuring the bending beam cantilever. The standard deviation of the measured noise is below nanometer.

Název v anglickém jazyce

Pixel-wise Amplitude Distribution Evaluation in Time Average Digital Holography

Popis výsledku anglicky

This article introduces a new holographic method for harmonic vibration measurement. The method called time average sweeping digital holography (TASDH) is based on the continuous shift of fringe pattern described by Bessel function over the object surface. The shift is done by phase modulation in one arm of holographic interferometer. Such temporal phase sweeping allows for evaluation of the vibration amplitude value independently in each pixel by application of intensity values cross-correlation of steady state and oscillating object. Main advantage of proposed technique with respect to other methods of digital holographic vibration is its ability to measure the amplitude of vibration without the risk of interference order mismatch. Thanks to above mentioned properties, the method allows measurement of amplitude modes with high slopes or discontinuous surfaces as well as partially shaded objects. The method was experimentally tested by measuring the bending beam cantilever. The standard deviation of the measured noise is below nanometer.

Druh

D - Stať ve sborníku

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 statě ve sborníku

Journal of Physics: Conference Series

ISBN

—

ISSN

17426588

e-ISSN

—

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

Institute of Physics Publishing

Místo vydání

—

Místo konání akce

Ancona

Datum konání akce

1. 1. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—