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Phase-derivative-ba...
Phase-derivative-based estimation of a digital reference wave from a single off-axis digital hologram
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- Khodadad, Davood, 1985- (författare)
- Luleå tekniska universitet,Örebro universitet,Institutionen för naturvetenskap och teknik,Experimental Mechanics, Luleå University of Technology, SE-971 87 Luleå, Sweden,Strömningslära och experimentell mekanik
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(creator_code:org_t)
- Optical Society of America, 2016
- 2016
- Engelska.
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Ingår i: Applied Optics. - : Optical Society of America. - 1559-128X .- 2155-3165 .- 0003-6935 .- 1539-4522. ; 55:7, s. 1663-1669
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This paper describes a method to obtain an estimated digital reference wave from a single off-axis digital hologram that matches the actual experimental reference wave as closely as possible. The proposed method is independent of a reference flat plate and speckles. The digital reference wave parameters are estimated directly from the recorded phase information. The parameters include both the off-axis tilt angle and the curvature of the reference wave. Phase derivatives are used to extract the digital reference wave parameters without the need for a phase unwrapping process. Thus, problems associated with phase wrapping are avoided. Experimental results for the proposed method are provided. The simulated effect of the digital reference wave parameters on the reconstructed image phase distribution is shown. The pseudo phase gradient originating from incorrect estimation of the digital reference wave parameters and its effect on object reconstruction are discussed.
Ämnesord
- 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 -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Data processing by optical means
- Geometric optical design
- Fringe analysis
- Inverse problems
- Digital holography
- Phase unwrapping
- Digital holographic imaging
- Holographic microscopy
- Phase estimation
- Phase retrieval
- Phase unwrapping
- Spatial frequency
- Experimentell mekanik
- Technology (byts ev till Engineering)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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