Faculty Profiles - OKAMOTO Takashi

Papers - OKAMOTO Takashi

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Structural coloration and epicuticular wax properties of the distinctive glaucous leaves of Encephalartos horridus Reviewed International journal

Takashi Nobusawa, Takashi Okamoto, Michiharu Nakano, Makoto Kusaba

Journal of Experimental Botany ( Oxford University Press ) 2025.03

Random laser emission from dye-doped gain media with optically trapped scattering particles Reviewed International journal

T. Okamoto, N. Yokoi, T. Kaku

Optical Materials Express ( Optica ) 14 ( 4 ) 880 - 888 2024.03

Random lasers: Mechanisms and control -Toward the realization of a new laser source Invited

Takashi Okamoto

Optical Alliance ( JAPAN INDUSTRIAL PUBLISHING CO., LTD. ) 35 ( 7 ) 13 - 17 OA2404-02 2024.07

Structural design of random lasers with specified emission bands Reviewed International journal

T. Okamoto, R. Ohshige, H. Nakajima

Optical Review ( Springer Nature ) 31 ( 1 ) 156 - 163 2024.01

Emission properties of random lasers with scatterer distribution formed by optical trapping Reviewed International journal

T. Kaku, N. Yokoi, T. Okamoto

Proceedings of SPIE (10th Optical Manipulation and Structured Materials Conference (OMC 2023)) ( SPIE ) 12606 126060M 2023.09

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Japan Yokohama 2023.04.17 - 2023.04.21

DOI： 10.1117/12.3008339

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85175999850&origin=inward

Structural design of random lasers with specific emission bands Invited Reviewed

T. Okamoto, R. Ohshige, H. Nakajima

Technical Digest of the Fourteenth Japan-Finland Joint Symposium on Optics in Engineering (OIE '23) 15 - 16 2023.08

Mechanism of random laser and its control Invited

Takashi Okamoto

MICROOPTICS NEWS ( The Japan Society of Applied Physics ) 41 ( 2 ) 37 - 42 2023.06

Active control of random lasing using the optical trapping technique Reviewed International journal

T. Kaku, N. Yokoi, T. Okamoto

Proceedings of CLEO Pacific Rim 2022 ( Optica (Optical Society of America) ) P-CTh1-14 2022.08

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Japan Sapporo 2022.07.31 - 2022.08.05

DOI： 10.1364/CLEOPR.2022.P_CTh1_14

Scopus

Other Link： https://opg.optica.org/abstract.cfm?uri=CLEOPR-2022-P_CTh1_14

Design of scatterer configuration for spectral optimization of random lasers Reviewed International journal

T. Okamoto, K. Kajisa, R. Ohshige

Proceedings of CLEO Pacific Rim 2022 ( Optica (Optical Society of America) ) CThP1G-06 2022.08

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Japan Sapporo 2022.07.31 - 2022.08.05

DOI： 10.1364/CLEOPR.2022.CThP1G_06

Scopus

Other Link： https://opg.optica.org/abstract.cfm?uri=CLEOPR-2022-CThP1G_06

Inverse design of two-dimensional disordered structures for spectral optimization of random lasers Reviewed International journal

T. Okamoto, K. Imamura, K. Kajisa

Optics Communications ( Elsevier ) 508 127775 2022.04

Active Control of Random Lasing Using the Optical Trapping Technique Reviewed International journal

Kaku T., Yokoi N., Okamoto T.

2022 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2022 - Proceedings 2022.01

Design of Scatterer Configuration for Spectral Optimization of Random Lasers Reviewed International journal

Okamoto T., Kajisa K., Ohshige R.

2022 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2022 - Proceedings 2022.01

Emission characteristics of random lasers and their control Invited Reviewed International journal

Okamoto T.

Proceedings of SPIE (10th Laser Display and Lighting Conference (LDC 2021)) 11851 72 - 74 2021.06

Emission characteristics of random lasers and their control Invited Reviewed International journal

Okamoto Takashi

Proceedings of SPIE (LDC 2021) 11851 72 - 74 2021.01

Designing random structures for random laser media Reviewed

T. Okamoto, K. Imamura

Technical Digest of the Thirteenth Japan-Finland Joint Symposium on Optics in Engineering (OIE '19) 87 - 88 2019.08

Random laser action in dye-doped polymer media with inhomogeneously distributed particles and gain Reviewed International journal

T. Okamoto, M. Mori

Applied Sciences 9 ( 17 ) 3499 2019.08

Development of laser speckle blood flowmeter for evaluating the physiological function of skin Reviewed International journal

Y. Nagashima, Y. Ohsugi, M. Hiraishi, Y. Niki, A. Fuji, M. Majima, T. Okamoto

Biomedical Physics & Engineering Express 5 ( 5 ) 055012 2019.08

Optimal digitization of one-dimensional dynamic speckle signals for object identification Reviewed

T. Okamoto, J. Mizobe

Asian Journal of Physics 27 ( 9-12 ) 475 - 482 2018.12

Control of particles for production of random laser medium: estimation on characteristics based on numerical simulations

N. Yokoi, T. Okamoto, Y. Aizu

Proceedings of 61st Meeting on Lightwave Sensing Technology 129 - 136 LST61-20 2018.06

波動光学を用いた肌の光反射特性解析 Invited

岡本卓

光アライアンス ( 日本工業出版 ) 29 ( 4 ) 1 - 5 2018.04

Fundamental study on optical control of particles for production of random laser medium

Yokoi Naomichi, Okamoto Takashi, Aizu Yoshihisa

The Proceedings of the Symposium on Micro-Nano Science and Technology ( The Japan Society of Mechanical Engineers ) 2018.9 ( 0 ) 30am3PN33 2018.01

Language：Japanese Publishing type：Research paper (conference, symposium, etc.)

<p>Optical trapping and guiding using laser have been proven to be useful for non-contact and non-invasive manipulation of small objects such as biological cells, organelles within cells, and dielectric particles. We have numerically investigated so far the motion of a Brownian particle suspended in still water under illumination of a speckle pattern generated by interference of coherent light scattered by a rough object. In the present study, we numerically investigate the motion of titanium dioxide particles in a photo-curing resin under the illumination of a speckle pattern. Trajectory of the particle is simulated in relation to its size and, power and size of the speckle grains to confirm the feasibility of the present method for performing optical trapping and guiding of the particle in the photo-curing resin. The present method is expected to be applied to the fabrication of a random laser medium.</p>

DOI： 10.1299/jsmemnm.2018.9.30am3pn33

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmemnm/2018.9/0/2018.9_30am3PN33/_pdf

Effects of inhomogeneity in distribution of scatterers on random laser emission Reviewed

T. Okamoto, M. Mori, T. Haruno

2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017 2017-January 1 - 3 S2349 2017.11

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Singapore Singapore 2017.07.31 - 2017.08.04

DOI： 10.1109/CLEOPR.2017.8119021

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85044175793&origin=inward

A novel analytical method of facial skin blood flow by laser speckle flowgraphy (LSFG) Reviewed

Y. Nagashima, Y. Ohsugi, M. Hiraishi, Y. Niki, K. Maeda, T. Okamoto

Extended Abstracts of the 24th Congress of International Commission for Optics (ICO-24) P6-07 2017.08

Theoretical and numerical analysis of light scattering from the human skin surface based on wave optics Reviewed

T. Okamoto, R. Sakai, T. Igarashi, M. Takabayashi

Extended Abstracts of the 24th Congress of International Commission for Optics (ICO-24) Th1B-02 2017.08

光波工学研究室（色材サロン（大学・研究所めぐり）） Invited

岡本卓, 高林正典

色材協会誌 ( 色材協会 ) 90 ( 7 ) 253 - 254 2017.07

Random lasing in dye-doped polymer random media with a bubble structure Reviewed

T. Okamoto, R. Yoshitome

Journal of the Optical Society of America B ( Optical Society of America ) 34 ( 7 ) 1497 - 1502 2017.06

Effects of inhomogeneity in distribution of scatterers on random laser emission Reviewed International journal

Okamoto T., Mori M., Haruno T.

Optics InfoBase Conference Papers Part F122-CLEOPR 2017 2017.01

Design of writing patterns for multi-level self-referential holographic data storage by phase-only modulation Reviewed

Daiki Murozono, Masanori Takabayashi, Takashi Okamoto

International Workshop on Holography and Related Technologies (IWH 2016) Digest 2016.11

Signal modulation, recording, and detection error characteristics in pseudo-spatial quadrature amplitude modulation-based holographic data storage system Reviewed

Masanori Takabayashi, Yuya Sakaki, Takashi Okamoto

International Symposium on Optical Memory (ISOM '16) Technical Digest 2016.10

Inter-page crosstalk analyses in 3D multiplexed self-referential holographic data storage Reviewed

Taisuke Eto, Masanori Takabayashi, Takashi Okamoto

International Symposium on Optical Memory (ISOM '16) Technical Digest 2016.10

Numerical simulations on the focus-shift multiplexing technique for self-referential holographic data storage Reviewed

Masanori Takabayashi, Taisuke Eto, Takashi Okamoto

Optical Review 23 ( 6 ) 987 - 996 2016.08

Numerical simulations on inter-page crosstalk characteristics in three-dimensional shift multiplexed self-referential holographic data storage Reviewed

Taisuke Eto, Masanori Takabayashi, Atsushi Okamoto, Masatoshi Bunsen, Takashi Okamoto

Japanese Journal of Applied Physics 55 ( 8 ) 08RD01-1 - 08RD01-7 2016.07

Theoretical and numerical analysis of light reflection from the human skin based on wave optics Reviewed

R. Sakai, T. Igarashi, M. Takabayashi, T. Okamoto

Proceedings of Biomedical Imaging and Sensing Conference 2016 (BISC '16) BISCp6-21 2016.05

Treatment of Light Phenomena in the Context of Wave and Electromagnetic Optics Invited

OKAMOTO Takashi

Journal of the Japan Society of Colour Material ( Japan Society of Colour Material ) 89 ( 3 ) 93 - 97 2016.03

Authorship：Corresponding author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)

Propagation and scattering of light in a medium is one of the major topics in the study of color materials as well as in many other research fields. Several optical theories dealing with the topic have been developed so far, including geometrical optics and quantum optics. If the minimum length scale of an object of interest is much larger than the wavelength of light, we can discuss the problems of light reflection and refraction by treating the light as rays. For smaller length scales, however, there are some phenomena which cannot be described by geometrical optics. In this case, we need to treat light as scalar or vector waves. The present article presents the theoretical treatment of light phenomena in the context of wave and electromagnetic optics. The finite-difference time-domain method is introduced as a numerical method for analyzing light propagation and scattering in complex media.

DOI： 10.4011/shikizai.89.93

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/shikizai/89/3/89_93/_pdf

Self-Referential Holographic Data Storage using Recording Beam with Inhomogeneous Spatial Amplitude Distribution

Masanori Takabayashi, Daiki Murozono, Takashi Okamoto

40 ( 6 ) 131 - 134 2016.02

Focus-Shift Multiplexing Technique by Wavefront Modulation for Self-Referential Holographic Data Storage Reviewed

Masanori Takabayashi, Taisuke Eto, Takashi Okamoto

IWH 2015 Technical Digest 2015.12

Numerical simulations on 3D shift multiplexed self-referential holographic data storage: shift multiplexing properties along z-axis Reviewed

Taisuke Eto, Masanori Takabayashi, Atsushi Okamoto, Masatoshi Bunsen, Takashi Okamoto

THE TWENTIETH MICROOPTICS CONFERENCE (MOC'15) TECHNICAL DIGEST 112 - 113 2015.10

Recording procedures for high-quality signal readout in self-referential holographic data storage Reviewed

Masanori Takabayashi, Atsushi Okamoto, Taisuke Eto, Takashi Okamoto

Applied Optics 54 ( 16 ) 5167 - 5174 2015.06

Numerical simulations on design and detection of spatial quadrature amplitude modulated signals for high-density holographic data storage

Masanori Takabayashi, Toshiyuki Nakai, Kento Ryu, Atsushi Okamoto, Jin Nozawa, Takashi Okamoto

39 ( 7 ) 21 - 26 2015.02

Laser emission from random gain media with bubble structures Reviewed

T. Okamoto, S. Matsushita and M. Takabayashi

Proceedings of the Tenth International Conference on Laser-light and Interactions with Particles (LIP2014) NR-1 2014.08

Shift-multiplexed self-referential holographic data storage Reviewed

M. Takabayashi, A. Okamoto, T. Eto, T. Okamoto

Applied Optics 53 ( 20 ) 4375 - 4381 2014.07

Fundamentals of Random Lasers and Recent Developments Invited Reviewed

Kogaku ( The Optical Society of Japan ) 43 ( 5 ) 211 - 216 2014.05

Phenomenon of light scattering by small particles and variations in appearance of human skin covered with powder particles Invited

T. Okamoto, T. Igarashi

Fragrance Journal ( Fragrance Journal LTD. ) 42 ( 4 ) 48 - 55 2014.04

Effect of the surface roughness on the reflection and scattering properties of human skin Reviewed

K. Tsukamoto, T. Igarashi, M. Takabayashi and T. Okamoto

Proceedings of Biomedical Imaging and Sensing Conference 2014 (BISC '14) BISCp3-16 2014.04

Readout Properties of Single Recorded Hologram in Self-Referential Holographic Data Storage Reviewed

TAKABAYASHI Masanori, ETO Taisuke, BUNSEN Masatoshi, OKAMOTO Atsushi, OKAMOTO Takashi

IEICE technical report. Magnetic recording ( The Institute of Electronics, Information and Communication Engineers ) 113 ( 267 ) 11 - 16 2013.10

Language：Japanese Publishing type：Research paper (scientific journal)

We describe the procedures, principles and properties of self-referential holography (SRH) in which any reference beam is not required to record and readout holograms.To improve the readout quality of SRH, we performed the numerical simulations and investigated the recording and readout properties in detail. As a results, we could successfully achieve the drastically improvement of the readout quality by shifting the focal position and by using oversampled additional pattern.

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/110009818819

Readout properties of single recorded hologram in self-referential holographic data storage

M. Takabayashi, T. Eto, M. Bunsen, A. Okamoto, T. Okamoto

IEICE Technical Report 113 ( 267 ) 11 - 16 2013.10

Improvement of signal-to-noise ratio in self-referential holographic data storage by using oversampled additional pattern Reviewed

M. Takabayashi, A. Okamoto, T. Okamoto

Digest of the International Workshop on Holography and Related Technologies 2013 (IWH 2013) 15a-4 2013.10

Random laser emission from gain media with inhomogeneously distributed scatterers Invited Reviewed

T. Okamoto, R. Yoshitome, S. Matsushita

Technical Digest of the Tenth Japan-Finland Joint Symposium on Optics in Engineering (OIE '13) 7 - 8 2013.09

Influence of additional phase modulation pattern and focal shift in self-referential holographic data storage Reviewed

M. Takabayashi, A. Okamoto, T. Okamoto

Technical Digest of the Tenth Japan-Finland Joint Symposium on Optics in Engineering (OIE '13) 93 - 94 2013.09

Shift multiplexing properties of self-referential holographic data storage Reviewed

M. Takabayashi, A. Okamoto, T. Okamoto

Technical Digest of the International Symposium on Optical Memory (ISOM '13) 66 - 67 Tu-H-04 2013.08

Monte Carlo simulation of light reflection from cosmetic powder particles near the human skin surface Reviewed

T. Okamoto,T. Kumagawa,M. Motoda,T. Igarashi,K. Nakao

Journal of Biomedical Optics 18 ( 6 ) 061232-1 - 061232-11 2013.05

Design and Fabrication of Cosmetic Foundation Ingredients Based on Spectral Property of Skin Texture Reviewed

IGARASHI Takanori, OKAMOTO Takashi, CHEN Yen-Wei

37 ( 3 ) 204 - 205 2013.05

Emission properties of random laser media with a bubble structure Reviewed

T. Okamoto, R. Yoshitome

Conference Digest of CLEO/Europe - IQEC 2013 JSIII-1.1 2013.05

Multi-level self-referential holographic data storage Reviewed

M. Takabayashi, A. Okamoto, M. Bunsen, T. Okamoto

Technical Digest of International Symposium on Optical Memory (ISOM '12) 12 - 13 no. Mo-B-04 2012.09

Monte Carlo simulation of light reflection from cosmetic powders on the skin Reviewed

T. Okamoto, M. Motoda, T. Igarashi, K. Nakao

Proc. SPIE (European Conferences on Biomedical Optics (ECBO 2011)) 8090 809015-1 - 809015-7 2011.06

Powder-gel technology: A unique approach to achieving youthful facial appearance based on morphological control of foundation layers Reviewed

N. Kurotani,T. Igarashi,K. Nakao,T. Terada,M. Motoda,T. Okamoto,Y. W. Chen

Proceedings of the 26th Congress of the International Federation of Societies of Cosmetic Chemists (IFSCC 2010) 211 - 212 2010.09

Optimal sampling and quantization of dynamic speckles for object identification Reviewed

Takashi Okamoto,Jun Mizobe

Proceedings of SPIE (Speckle 2010) 7387 ( 738702 ) 2010.09

Effect of particle size and shape on nonresonant random laser action of dye-doped polymer random media Reviewed

T. Okamoto,S. Adachi

Optical Review 17 ( 3 ) 300 - 304 2010.06

Light reflection properties of skin with pores: The effect of applying cosmetic powders Reviewed

M. Motoda,T. Igarashi,K.,T. Okamoto

Technical Digest of the Seventh International Conference on Optics-photonics Design and Fabrication (ODF'10) 353 - 354 2010.04

Effect of particle size and shape on random laser action of dye-doped polymer random media Reviewed

T. Okamoto,S. Adachi

Technical Digest of the Eighth Japan-Finland Joint Symposium on Optics in Engineering 21 - 22 2009.09

Statistical properties of three-dimensional speckle distributions produced by crossed scattered waves Reviewed

T. Okamoto,S. Fujita

Journal of the Optical Society of America A 25 ( 12 ) 3030 - 3042 2008.12

Light scattering properties of random media with a structure of laser speckle Reviewed

Takashi Okamoto,Masaki Miyamoto,Sou Tanaka

Proc. SPIE 7138 ( 71380V ) 2008.11

Dynamic speckle signals as a key code for object identification Reviewed

Takashi Okamoto,Jun Mizobe

Proc. ICO 21 (Optics for the 21st Century) 297 - 297 2008.10

Scattering properties of random media with three-dimensional speckle structures Reviewed

T. Okamoto,M. Miyamoto,S. Tanaka

Technical Digest of the Seventh Finnish-Japanese Joint Symposium on Optics in Engineering 73 - 74 2007.08

Statistical properties of superposed fractal speckle fields Invited Reviewed

Proceedings of SPIE (Laser Optics 2006: Wavefront Transformation and Laser Beam Control) 6613 ( 66130E ) 2007.04

三次元多重スペックル場の空間相関特性 --- 新しい光散乱素子の創成を目指して --- Invited

岡本卓

光アライアンス ( 日本工業出版 ) 18 ( 3 ) 13 - 17 2007.04

Correlation properties of three dimensional superposed fractal speckle distributions Reviewed

Takashi Okamoto,Takuya Moriyama,Shuhei Fujita

Proceedings of SPIE (Speckle06) 6341 ( 634102 ) 2006.09

Intensity correlation of orthogonally crossed speckle waves Invited Reviewed

Proceedings of SPIE (The Seventh International Conference on Correlation Optics) 6254 ( 625403 ) 2006.05

Light amplification from Cantor and asymmetric multilayer resonators Reviewed

T. Okamoto,A. Fukuyama

Optics Express 13 ( 20 ) 8122 - 8127 2005.10

Statistical properties of the three-dimensional intensity distribution formed with orthogonally crossed speckle beams Invited Reviewed

T. Okamoto,H. Gotou,Y. Kawabata,M. Takeuchi

Technical Digest of the Sixth Japan-Finland Joint Symposium on Optics in Engineering 45 - 46 2005.09

Spatial properties of a superposed speckle field and its application to the fabrication of random laser media Reviewed

Takashi Okamoto,Hiroyuki Gotou,Tatsuya Yonemori,Yasuaki Kawabata

Proceedings of the 2004 Photon Correlation and Scattering Conference, NASA/CP-2004-213207 86 - 88 2004.08

Transmission properties of fractal multilayer structures with gain Reviewed

Takashi Okamoto,Akira Fukuyama

Technical Digest of 2004 ICO International Conference (Optics & Photonics in Technology Frontier) 163 - 164 2004.07

Intensity correlations of coherent light reflected from dense powders Reviewed

Takashi Okamoto,Shuta Yanagita

Opt. Commun. 227 ( 1-3 ) 15 - 23 2003.11

Spatial properties of light scattering fields produced by crossed random waves Reviewed

Takashi Okamoto,Hiroyuki Gotou

Proceedings of SPIE Vol. 4829 (ICO19, Optics for the Quality of Life) 4829 583 - 584 2002.08

レーザー多重散乱光を利用した微粒子粉体計測

岡本卓,柳田修太

電気学会計測研究会資料 IM-01 ( 42 ) 7 - 12 2001.10

Correlation properties of light multiple scattered from powders Reviewed

Takashi Okamoto,Shuta Yanagita

Proceedings of SPIE (ICOSN 2001, Optical Engineering for Sensing and Nanotechnology) 4416 440 - 443 2001.06

Light amplification by multilayers with fractal gain structures Reviewed

Proceedings of SPIE (ICO18, Optics for the Next Millennium) 3749 122 - 123 1999.08

Influence of objects buried in highly dense media on angular correlations of the scattered intensity Reviewed

S. Sangu(Hokkaido Univ.),T. Okamoto,J. Uozumi(Hokkaido Univ.),T. Asakura(Hokkai-Gakuen Univ.)

Proceedings of SPIE (ICO18, Optics for the Next Millennium) 3749 679 - 680 1999.08

Angular correlation properties of multiply scattered light in random media with buried objects Reviewed

S. Sangu(Hokkaido Univ.),T. Okamoto,J. Uozumi(Hokkaido Univ.),T. Asakura(Hokkai-Gakuen Univ.)

Proceedings of SPIE (Optical Engineering for Sensing and Nanotechnology 3740 150 - 153 1999.06

Enhanced intensity fluctuations of multiply scattered light in nonlinear absorbing media Reviewed

S. Sangu(Hokkaido Univ.),T. Okamoto,J. Uozumi(Hokkaido Univ.),T. Asakura(Hokkai-Gakuen Univ.)

Opt. Rev. 6 ( 2 ) 104 - 109 1999.04

Effect of absorption on surface speckles in random media Reviewed

S. Sangu(Hokkaido Univ.),T. Okamoto,J. Uozumi(Hokkaido Univ.),T. Asakura(Hokkai-Gakuen Univ.)

Waves in Random Media 9 ( 1 ) 27 - 36 1999.04

Ultraviolet-cured polymer microlens arrays Reviewed

T. Okamoto,M. Mori(NDA),T. Karasawa(Mitsubishi Chem.),S. Hayakawa(Mitsubishi Chem.),I. Seo(Ibaraki Env. Res. Center),H. Sato(NDA)

Appl. Opt. 38 ( 14 ) 2991 - 2996 1999.04

Optical characterization of UV-cured polymer microlens arrays Reviewed

T. Okamoto,M. Mori(NDA),T. Karasawa(Mitsubishi Chem.),S. Hayakawa(Mitsubishi Chem.),I. Seo(Ibaraki Env. Res. Center),H. Sato(NDA)

Proceedings of OII'98, Journal of Optoelectronics.Laser 9 ( Suppl. ) 99 - 101 1998.08

Effects of nonlinear absorption on optical coherent phenomena of multiply-scattered light Reviewed

S. Sangu(Hokkaido Univ.),T. Okamoto,J. Uozumi(Hokkaido Univ.),T. Asakura(Hokkai-Gakuen Univ.)

Proceedings of OII'98, Journal of Optoelectronics.Laser 9 ( Suppl. ) 362 - 364 1998.08

Anomalous correlation of intensity fluctuations in strong-scattering media Reviewed

S. Sangu(Hokkaido Univ.),T. Okamoto,T. Asakura(Hokkaido Univ.)

J. Mod. Opt. 45 ( 1 ) 117 - 132 1998.04

Ultraviolet-cured polymer micro-optical elements Reviewed

T. Okamoto,R. Ohmori,S. Hayakawa,I. Seo,H. Sato

Opt. Rev. 4 ( 4 ) 516 - 520 1997.04

Fabrication of polymer microlens arrays by means of UV-curing technique Reviewed

T. Okamoto,N. Matsushita,S. Hayakawa,I. Seo,H. Sato

Technical Digest of CLEO/Pacific Rim '97 149 - 149 1997.04

1995年光学界の進展　1. 光物理

岡本卓

光学 ( 未設定 ) 25 ( 4 ) 181 - 182 1996.04

Fibrous radial structure of doubly-scattered speckles under illumination of the polychromatic light Reviewed

T. Nishibe,T. Okamoto,T. Asakura

Optik 103 ( 3 ) 115 - 121 1996.04

Effect of a surface profile on spectral correlation properties of dynamic doubly scattered dichromatic speckles Reviewed

T. Nishibe,T. Okamoto,T. Asakura

Pure and Appl. Opt. 5 ( 6 ) 975 - 983 1996.04

Enhanced backscattering of partially coherent light Reviewed

T. Okamoto,T. Asakura

Opt. Lett. 21 ( 6 ) 369 - 371 1996.04

UV induced organic polymer optical elements-Phase diffraction grating- Reviewed

H. Sato,R. Ohmori,T. Okamoto,S. Hayakawa,I. Seo

EOS Topical Meetings Digest (Materials for Nonlinear Optics) 7 243 - 246 1996.04

Enhanced backscattering of light by disordered media: Effects of spatial coherence Reviewed

T. Okamoto,T. Asakura

Proc. SPIE (ICO 17, Optics for Science and New Technology) 2778 407 - 408 1996.04

Interference effects of multiply-scattered light in strong scattering media Reviewed

S. Sangu,T. Okamoto,T. Asakura

Proc. SPIE (ICO 17, Optics for Science and New Technology) 2778 383 - 384 1996.04

多重散乱媒質におけるコヒーレント光波伝搬特性の解析：光の弱局在と拡散波分光

岩井俊昭,岡本卓,西村吾朗

電子科学研究 3 31 - 33 1996.01

不規則媒質による新しいレーザー光多重散乱現象

岡本卓,朝倉利光

レーザー研究 ( 未設定 ) 23 ( 8 ) 657 - 666 1995.04

光散乱現象研究の展開－単一散乱から多重散乱まで－

岩井俊昭,岡本卓,朝倉利光

応用物理 ( 未設定 ) 63 ( 1 ) 14 - 22 1994.04

Polarization phase-shifting technique applied to a speckle correlation interferometer using an image fiber Reviewed

L. Holder,T. Okamoto,T. Asakura

Optik 96 ( 3 ) 120 - 124 1994.04

Cross-correlation properties of multiply-scattered dichromatic light from flowing colloidal particles Reviewed

T. Okamoto,T. Asakura

Opt. Rev. 1 ( 2 ) 139 - 142 1994.04

Depolarization measurements of light propagating through an image fiber Reviewed

L. Holder,T. Okamoto,T. Asakura

J. Opt. (Paris) 25 ( 4 ) 139 - 142 1994.04

Spectral correlation measurements of light propagating through multiple scattering media Reviewed

T. Okamoto,T. Asakura

URSI Rasio Science Meeting Program and Abstract 306 - 306 1994.04

Experimental study of dynamic multiple scattering using the spectral correlation method Reviewed

T. Okamoto,T. Asakura

Conference Abstract of MUSCLE7 82 - 83 1994.04

Cross-correlation properties of dichromatic multiple scattering from flowing colloidal particles Reviewed

T. Okamoto,T. Asakura

ICO Topical Meeting Digest (Frontiers in Information Optics) 208 - 208 1994.04

スペックルの基礎と工学・医学への応用

岡本卓,朝倉利光

計測と制御 ( 未設定 ) 32 ( 8 ) 667 - 676 1993.04

Multiple light scattering from a moving layer of Brownian particles : comparison with a rigid phase screen Reviewed

T. Okamoto,T. Asakura

Waves in Random Media 3 ( 3 ) 211 - 219 1993.04

Spectral decorrelation of dynamic speckles from concentrated colloidal suspensions in a uniform flow Reviewed

T. Okamoto,T. Asakura

Opt. Commun. 103 ( 5-6 ) 355 - 360 1993.04

A digital speckle correlation interferometer using an image fiber Reviewed

L. Holder,T. Okamoto,T. Asakura

Meas. Sci. Technol. 4 ( 7 ) 746 - 753 1993.04

Speckle correlation method for the real time measurement of motion paths using a liquid crystal television" Reviewed

T. Okamoto,Y. Egawa,T. Asakura

Opt. Eng. 32 ( 1 ) 10 - 14 1993.04

Cross-spectral correlation of dynamic speckles from a moving layer of particle suspensions Reviewed

T. Okamoto,T. Asakura

Proc. 3rd International Congress on Optical Particle Sizing 97 - 102 1993.04

多重散乱光の波長相関特性

岡本卓,朝倉利光

電子科学研究 1 79 - 80 1993.04

Liquid crystal television applied to a speckle correlation method : real time measurement of the object displacement" Reviewed

T. Okamoto,Y. Egawa,T. Asakura

Opt. Commun. 88 ( 1 ) 17 - 21 1992.04

Effects of imaging properties on dynamic speckles produced by a set of moving phase screens Reviewed

T. Okamoto,T. Asakura

Waves in Random Media 2 ( 1 ) 49 - 65 1992.04

Spacetime correlation functions of dynamic speckles produced by a series of moving phase screens Reviewed

T. Okamoto,T. Asakura

Waves in Random Media 1 ( 4 ) 391 - 408 1991.04

Detection of the object velocity using doubly-scattered dynamic speckles under Gaussian beam illumination Reviewed

T. Okamoto,T. Asakura

J. Mod. Optics 38 ( 9 ) 1821 - 1839 1991.04

Detection of the object velocity using the time-varying scattered speckles Reviewed

T. Okamoto,T. Asakura

Proc. SPIE (Optical Systems in Adverse Environments) 1399 192 - 199 1991.04

Dynamic properties of time-varying speckles produced by a series of moving phase screens Reviewed

T. Okamoto,T. Asakura

ICO Topical Meeting Digest (Atmospheric, Volume and Surface Scattering and Propagation) 363 - 366 1991.04

スペックルを利用した微小表面計測

岡本卓,朝倉利光

O plus E ( 未設定 ) ( 124 ) 122 - 127 1990.04

Velocity dependence of image speckles produced by a moving diffuser under dynamic speckle illumination Reviewed

T. Okamoto,T. Asakura

Opt. Commun. 77 ( 2-3 ) 113 - 120 1990.04

Velocity measurements of two moving diffusers using a temporal correlation length of doubly-scattered speckle Reviewed

T. Okamoto,T. Asakura

J. Mod. Optics 37 ( 3 ) 389 - 408 1990.04

Velocity dependence of doubly-scattered speckles produced by a cascade of two moving diffusers Reviewed

T. Okamoto,T. Asakura

Proc. SPIE (ICO 15, Optics in Complex Systems) 1319 536 - 537 1990.04

A laser speckle velocimeter using optical fibers : power spectra of detected speckle signals Reviewed

H. Fujii,T. Okamoto,T. Asakura

Laser Anemometry in Fluid Mechanics (Ladoan, Instituto Superior Tecnico, Lisbon, 1988) 43 - 53 1988.04

Power spectra of speckle signals detected by optical-fiber probe Reviewed

H. Fujii,T. Okamoto,T. Asakura

J. Opt. Soc. Am. A 4 ( 8 ) 1366 - 1375 1987.04

光ファイバープローブによる粗物体の速度測定

岡本卓,藤居仁,朝倉利光

電子通信学会技術研究報告 OQE85-150 7 - 12 1986.04

Detection properties of an optical fiber probe for laser speckle velocimetry Reviewed

H. Fujii,T. Asakura,T. Okamoto

Opt. Commun. 55 ( 6 ) 393 - 398 1985.04

Optical fiber probe for blood flow monitoring Reviewed

H. Fujii,T. Asakura,T. Okamoto

Proc. SPIE (Optical Fibers in Medicine and Biology) 576 76 - 82 1985.04

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<OKAMOTO Takashi>

Papers - OKAMOTO Takashi