Digital in-line holography for dynamic micro-metrology

In this paper in-line digital holography has been explored for dynamic micro metrological applications. In in-line digital holography, full CCD sensor area is utilized for real image reconstruction of the objects with less speckle noise. Numerical evaluation of the amplitude and phase information du...

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Main Authors: Hegde, Gopalkrishna M., Singh, Vijay Raj, Asundi, Anand Krishna
Other Authors: School of Mechanical and Aerospace Engineering
Format: Conference or Workshop Item
Language:English
Published: 2011
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Online Access:https://hdl.handle.net/10356/94256
http://hdl.handle.net/10220/7189
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-942562023-03-04T17:07:58Z Digital in-line holography for dynamic micro-metrology Hegde, Gopalkrishna M. Singh, Vijay Raj Asundi, Anand Krishna School of Mechanical and Aerospace Engineering Optical Micro- and Nanometrology in Microsystems Technology (1st : 2006 : Strasbourg, France) DRNTU::Science::Physics::Optics and light In this paper in-line digital holography has been explored for dynamic micro metrological applications. In in-line digital holography, full CCD sensor area is utilized for real image reconstruction of the objects with less speckle noise. Numerical evaluation of the amplitude and phase information during reconstruction process finds promising applications in optical micro-metrology. Vibration analysis of the smaller object has been performed by combining the time average principle with in-line digital holographic methods. A double exposure method has been explored for measurements, which is simultaneously used to suppress the overlapping of zero-order and twin image wave with real image wave. The vibration amplitude and mean static state deformation of the harmonically excited object are analysed separately from time average in-line digital holograms. The experimental results are presented for a thin aluminium membrane of 5mm diameter. Published version 2011-10-10T05:42:13Z 2019-12-06T18:53:20Z 2011-10-10T05:42:13Z 2019-12-06T18:53:20Z 2006 2006 Conference Paper Singh, V. R., Hegde, G., & Asundi, A. K. (2006). Digital in-line holography for dynamic micro-metrology. Paper presented at the Optical Micro- and Nanometrology in Microsystems Technology. https://hdl.handle.net/10356/94256 http://hdl.handle.net/10220/7189 10.1117/12.664812 143372 en © 2006 SPIE. This paper was published in Proc. SPIE 6188 and is made available as an electronic reprint (preprint) with permission of SPIE. The paper can be found at: [DOI: http://dx.doi.org/10.1117/12.664812].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 9 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Physics::Optics and light
spellingShingle DRNTU::Science::Physics::Optics and light
Hegde, Gopalkrishna M.
Singh, Vijay Raj
Asundi, Anand Krishna
Digital in-line holography for dynamic micro-metrology
description In this paper in-line digital holography has been explored for dynamic micro metrological applications. In in-line digital holography, full CCD sensor area is utilized for real image reconstruction of the objects with less speckle noise. Numerical evaluation of the amplitude and phase information during reconstruction process finds promising applications in optical micro-metrology. Vibration analysis of the smaller object has been performed by combining the time average principle with in-line digital holographic methods. A double exposure method has been explored for measurements, which is simultaneously used to suppress the overlapping of zero-order and twin image wave with real image wave. The vibration amplitude and mean static state deformation of the harmonically excited object are analysed separately from time average in-line digital holograms. The experimental results are presented for a thin aluminium membrane of 5mm diameter.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Hegde, Gopalkrishna M.
Singh, Vijay Raj
Asundi, Anand Krishna
format Conference or Workshop Item
author Hegde, Gopalkrishna M.
Singh, Vijay Raj
Asundi, Anand Krishna
author_sort Hegde, Gopalkrishna M.
title Digital in-line holography for dynamic micro-metrology
title_short Digital in-line holography for dynamic micro-metrology
title_full Digital in-line holography for dynamic micro-metrology
title_fullStr Digital in-line holography for dynamic micro-metrology
title_full_unstemmed Digital in-line holography for dynamic micro-metrology
title_sort digital in-line holography for dynamic micro-metrology
publishDate 2011
url https://hdl.handle.net/10356/94256
http://hdl.handle.net/10220/7189
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