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Combined Reduced Ph...
Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements for Shape Measurement
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- Khodadad, Davood (författare)
- Örebro universitet,Luleå tekniska universitet,Strömningslära och experimentell mekanik,Department of Mechanical Engineering, Örebro University, Örebro, Sweden; Experimental Mechanics, Lulea University of Technology, Luleå, Sweden,Institutionen för naturvetenskap och teknik,Experimental Mechanics, Luleå University of Technology, Luleå, Sweden
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(creator_code:org_t)
- Hindawi Publishing Corporation, 2019
- 2019
- Engelska.
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Ingår i: International Journal of Optics. - : Hindawi Publishing Corporation. - 1687-9384 .- 1687-9392. ; 2019
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We present a digital holographic method to increase height range measurement with a reduced phase ambiguity using a dual-directional illumination. Small changes in the angle of incident illumination introduce phase differences between the recorded complex fields. We decrease relative phase difference between the recorded complex fields 279 and 139 times by changing the angle of incident 0.5° and 1°, respectively. A two cent Euro coin edge groove is used to measure the shape. The groove depth is measured as ≈300 μm . Further, numerical refocusing and analysis of speckle displacements in two different planes are used to measure the depth without a use of phase unwrapping process.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Experimentell mekanik
- Experimental Mechanics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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