Time average scanning digital holography

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F18%3A00492351" target="_blank" >RIV/61389021:_____/18:00492351 - isvavai.cz</a>
Result on the web
<a href="http://acc-ern.tul.cz/archiv/PDF/ACC_2018_1_04.pdf" target="_blank" >http://acc-ern.tul.cz/archiv/PDF/ACC_2018_1_04.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Time average scanning digital holography
Original language description
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 slopes amplitudes distribution or discontinuous/partially shaded objects. The correctness of the method was experimentally verified by measuring the bending piezo actuator.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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