Dr. Ryohei Hanayama Profile

Dr. Ryohei Hanayama

Associate Professor at GPI

SPIE Involvement:

Author

Area of Expertise:

Interferometry , Shape Measurement , Phase Detection , Wavelength Scanning Interferometry , Shearing Interferometry , Micro Lens

Websites:

Company Website

Publications (11)

Proceedings Article | 11 August 2023 Poster + Paper

Development of CNN-based asymmetric label smoothing method for visual inspection

M. Okazaki, R. Hanayama

Proceedings Volume 12623, 126230K (2023) https://doi.org/10.1117/12.2673752

KEYWORDS: Visual inspection, Defect detection, Inspection, Image classification, Classification systems, Convolutional neural networks, Overfitting

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Proceedings Article | 11 August 2023 Poster + Paper

Experimental observation of distributed pulse wave velocity with a noncontact portable shearing-speckle interferometer

N. Hayashi, R. Hanayama, K. Ishii

Proceedings Volume 12622, 1262211 (2023) https://doi.org/10.1117/12.2672585

KEYWORDS: Blood circulation, Laser interferometry, Shearing interferometers, Medicine, Portability, Vibration, Velocity measurements, Prisms, Doppler effect, Measurement devices

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Proceedings Article | 22 February 2017 Presentation + Paper

Velocity measurement using frequency domain interferometer and chirped pulse laser

K. Ishii, Y. Nishimura, Y. Mori, R. Hanayama, Y. Kitagawa, T. Sekine, N. Sato, T. Kurita, T. Kawashima, A. Sunahara, Y. Sentoku, E. Miura, A. Iwamoto, H. Sakagami

Proceedings Volume 10089, 100890H (2017) https://doi.org/10.1117/12.2255704

KEYWORDS: Velocity measurements, Interferometers, Pulsed laser operation, Picosecond phenomena, Imaging spectroscopy, Doppler effect, Spectroscopy, Reflectors, Laser irradiation, Fringe analysis, Mirrors, Laser applications

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Proceedings Article | 18 August 2014 Paper

A trial for a reliable shape measurement using interferometry and deflectometry

Ryohei Hanayama

Proceedings Volume 9203, 92030D (2014) https://doi.org/10.1117/12.2060353

KEYWORDS: Interferometry, Deflectometry, LCDs, Phase measurement, Charge-coupled devices, Reliability, Fringe analysis, Image resolution, Precision measurement, Phase interferometry

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Proceedings Article | 1 May 2014 Paper

Measurement of the surface shape and optical thickness variation of a polishing crystal wafer by wavelength tuning interferometer

Yangjin Kim, Kenichi Hibino, Ryohei Hanayama, Naohiko Sugita, Mamoru Mitsuishi

Proceedings Volume 9132, 91320V (2014) https://doi.org/10.1117/12.2051193

KEYWORDS: Wafer-level optics, Semiconducting wafers, Surface finishing, Crystals, Polishing, Wavelength tuning, Phase shifts, Lithium niobate, Fizeau interferometers, Detection and tracking algorithms

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Proceedings Article | 13 May 2013 Paper

Development of a zero-method interferometer by means of dynamic generation of reference wave front

Ryohei Hanayama, Katsuhiro Ishii

Proceedings Volume 8788, 87882S (2013) https://doi.org/10.1117/12.2021028

KEYWORDS: Spatial light modulators, Interferometers, Wavefronts, Interferometry, Phase shifts, Mirrors, Imaging devices, Phase shift keying, Beam splitters, Tunable lasers

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Proceedings Article | 13 September 2012 Paper

Error estimation of phase detection algorithms and comparison of window functions

Ryohei Hanayama, Kenichi Hibino

Proceedings Volume 8493, 84930J (2012) https://doi.org/10.1117/12.929785

KEYWORDS: Detection and tracking algorithms, Error analysis, Signal detection, Phase shifts, Phase shift keying, Phase shifting, Computer simulations, Algorithm development, Photovoltaics, Interference (communication)

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Proceedings Article | 27 May 2011 Paper

Development of error estimation method for phase detection in phase shift method

Ryohei Hanayama, Kenichi Hibino

Proceedings Volume 8082, 80822N (2011) https://doi.org/10.1117/12.889814

KEYWORDS: Detection and tracking algorithms, Error analysis, Signal detection, Phase shifts, Phase shift keying, Phase shifting, Computer simulations, Modulation, Algorithm development, Photovoltaics

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Proceedings Article | 17 June 2009 Paper

Small lens testing method using phase shift shearing interferometer

Ryohei Hanayama, Katsuhiro Ishii, Kiyofumi Matsuda

Proceedings Volume 7389, 73890Y (2009) https://doi.org/10.1117/12.827723

KEYWORDS: Shearing interferometers, Wavefronts, Phase shifts, Interferometers, Testing and analysis, Objectives, Optical fibers, Interferometry, Optical components, Reflection

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Proceedings Article | 9 December 2005 Paper

Measurement of optical thickness variation of a multiple-surface object by a wavelength tuning interferometer

Jan Burke, Kenichi Hibino, Ryohei Hanayama, Bonzenko Oreb

Proceedings Volume 6024, 60240O (2005) https://doi.org/10.1117/12.666830

KEYWORDS: Semiconducting wafers, Wafer-level optics, Wavelength tuning, Optical testing, Interferometers, Reflection, Interferometry, Lithium niobate, Glasses, Silica

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Proceedings Article | 2 August 2004 Paper

Interferometric measurement of a multiparallel-surface transparent object by a new class of wavelength tuning algorithms

Kenichi Hibino, Jan Burke, Ryohei Hanayama, Bozenko Oreb

Proceedings Volume 5531, (2004) https://doi.org/10.1117/12.555804

KEYWORDS: Signal detection, Interferometry, Phase shifts, Glasses, Modulation, Refractive index, Phase measurement, Algorithm development, Detection and tracking algorithms, Interference (communication)

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Showing 5 of 11 publications

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