2007 Fiscal Year Final Research Report Summary
Development of Low Coherence Digital Holography Based on Single-Exposure Phase-Shifting Digital Holography
| Project/Area Number |
18560035
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Wakayama University |
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Principal Investigator |
NOMURA Takanori Wakayama University, Faculty of Systems Engineering, Associate Professor (80222206)
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| Co-Investigator(Kenkyū-buntansha) |
NUMATA Takuhisa Wakayama University, Faculty of Systems Engineering, Professor (80135673)
NITANAI Eiji Wakayama University, Faculty of Systems Engineering, Research Associate (00304189)
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| Project Period (FY) |
2006 – 2007
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| Keywords | digital holography / profilemetry / reflection property / wave-splitting phase-shifting |
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| Research Abstract |
Measurement of a profile and reflectance property using low-coherence digital holography has been proposed. A number of digital holograms recorded by a low-coherence digital holography are used to calculate the profile and reflectance property of the object. We call the reconstructed images from the digital holograms, series of reconstructed images. The highest point corresponds to the number of series of the reconstructed images which as maximum pixel value. The profile is obtained from the numbers. The reflectance property corresponds the maximum pixel value for same position in each reconstructed images. To improve the accuracy of the measurement, we propose reduction of noise effect. In the proposed methods, the effect of speckles is dominant. To reduce it, statistical methods and the method by the wavelength profile of a light source are presented. By applying the proposed methods, the accuracy of measurement has been improved. Furthermore, the measurement of the object within the scattering media has been shown to confirm our proposed method.
For the one-shot phase-shifting method, two types of wavefront-splitting phase-shifting digital holography have been proposed. One is the method using an analyzer array and another is the method using a retarder array. Simulational experimental results are shown to confirm the one-shot phase-shifting digital holography using an analyzer array. By the experiments using a polarization imaging camera, the one-shot recording of the phase-shifting digital hologram has been accomplished.
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Research Products
(25 results)
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[Journal Article] Digital Holography Using Wavefront-Spitting Phase-Shifting Method2007
Author(s)
Takanori, Nomura, Shinji, Murata, Satoru, Yoneyama, Eiji, Nitanai, Takuhisa, Numata
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Journal Title
The Review of Laser Engineering 35, 6
Pages: 363-367
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Polarization imaging of a three-dimensional object by use of on-axis phase- shifting digital holography2007
Author(s)
Takanori, Nomura, Bahram, Javidi, Shinji, Murata, Eiji, Nitanai, Takuhisa, Numata
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Journal Title
Opt. Lett 32, 5
Pages: 481-483
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Profile and reflectance measurement using low-coherence digital holography -measurement using a function with snectral distribution of a light source-2008
Author(s)
Yohei, Miyashita, Takanori, Nomura, Eiji, Nitanai, Takuhisa, Numata
Organizer
The 55th Spring Meeting, 2008, The Japan Society of Applied Physics and Related Societies
Place of Presentation
Chiba, Japan
Year and Date
2008-03-27
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Profile and reflectance measurement using low-coherence digital holography2007
Author(s)
Yohei, Miyashita, Takashi, Konishi, Takanori, Nomura, Eiji, Nitanai, Takuhisa, Numata
Organizer
The 54th Spring Meeting, 2007, The Japan Society of Applied Physics and Related Societies
Place of Presentation
Kanagawa, Japan
Year and Date
2007-03-27
Description
「研究成果報告書概要(欧文)」より
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