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Hiromasa Oku

Portrait

Affiliation

Assistant Professor / Lecturer
Department of Information Physics and Computing,
Graduate School of Information Science and Technology, University of Tokyo
7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Phone: +81.3.5841.6936
Fax: +81.3.5841.8604
Email: Hiromasa_Oku

Awards

2006 Best Paper in Biomimetics, IEEE Int. Conf. on Robotics and Biomimetics

Research Theme

Oku is interested in Dynamic Image Control (DIC). The purpose of the DIC is to provide adequate visual information to human in comprehensible and intelligible way by the control of optics, illuminations, and signal processing. He researches on basic theory and device development, and also wide applications, such as bio-technology, microscope, visual media, and factory automations.

Publications

Papers

  • Wang Lihui, Hiromasa Oku, and Masatoshi Ishikawa : Variable-focus lens with 30 mm optical aperture based on liquid-membrane-liquid structure, Applied Physics Letters, Vol.102, 131111 (2013) [PDF (1.1M)] [Doi:10.1063/1.4800603] *AIP
  • Hiromasa Oku, Soshiro Makise, Masatoshi Ishikawa : High-Speed Autofocusing of Cells Using Radial Intensity Profiles Based on Depth From Diffraction (DFDi) Method, Journal of Aero Aqua Bio-mechanisms, Vol.3, No.1, pp.13-21 (2013) [doi:10.5226/jabmech.3.13]
  • Hiromasa Oku and Masatoshi Ishikawa : High-speed liquid lens with 2 ms response and 80.3 nm root-mean-square wavefront error, Applied Physics Letters, Vol.94, 221108 (2009) [PDF (312K)] [doi:10.1063/1.3143624] *AIP
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto and Masatoshi Ishikawa : Trajectory Planning of Motile Cell for Microrobotic Applications, Journal of Robotics and Mechatronics, Vol.19, No.2, pp.190-197 (2007)
  • Hiromasa Oku, Masatoshi Ishikawa, Theodorus, and Koichi Hashimoto : High-speed autofocusing of a cell using diffraction pattern, Optics Express, Vol.14, pp.3952-3960 (2006) [doi:10.1364/OE.14.003952] http://www.opticsinfobase.org/abstract.cfm?URI=oe-14-9-3952
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : A physical model for galvanotaxis of Paramecium cell, Journal of Theoretical Biology, Vol.242, Iss. 2, pp.314-328 (2006) [PDF (436K)] [doi:10.1016/j.jtbi.2006.02.021] *Elsevier
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Microrobotic Visual Control of Motile Cells using High-Speed Tracking System, IEEE Transactions on Robotics, Vol.21, No.4, pp.704-712 (2005) [PDF (1.1M)] *IEEE
  • Hiromasa Oku, Naoko Ogawa, Koichi Hashimoto, and Masatoshi Ishikawa : Two-dimensional tracking of a motile microorganism allowing high-resolution observation with various imaging techniques, Review of Scientific Instruments, Vol.76, No.3, 034301 (2005) [PDF (1.0M)] [Video (WMV, 2.2M)] [doi:10.1063/1.1857632] *AIP
  • Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Variable-focus lens with 1-kHz bandwidth, Optics Express, Vol.12, No.10, pp.2138-2149 (2004) [doi:10.1364/OPEX.12.002138] http://www.opticsinfobase.org/abstract.cfm?URI=oe-12-10-2138
  • Hiromasa Oku, and Masatoshi Ishikawa : Structure of Dynamic Focusing Lens with kHz Order Response for High-speed Vision System, Japanese Journal of Optics, Vol.31, No.10, pp.758-764 (2002)
  • Hiromasa Oku, Idaku Ishii, and Masatoshi Ishikawa : A microscopic visual feedback system, Systems and Computers in Japan, Vol.35, No.13, pp.71-79 (2004) ([Translated from] The Transactions of the Institute of Electronics Information and Communication Engineers D-II, Vol.J84-D-II, No.6, pp.994-1002 (2001) )

Book

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Dynamics Modeling and Real-time Observation of Galvanotaxis in Paramecium caudatum, Bio-mechanisms of Swimming and Flying --- Fluid Dynamics, Biomimetic Robots, and Sports Science --- (N. Kato and S. Kamimura Eds.), Springer, pp.29-40 (2008) (ISBN 978-4431733799)

Article

Invited Speech

  • Hiromasa Oku : Dynamic imaging based on high-speed optical components (Keynote Lecture), The 5th International Symposium on Aero Aqua Bio-Mechanisms (ISABMEC 2012)(Taipei, 2012.8.26) / Proceedings, pp.13-18

Conference

  • Lihui Wang, Hiromasa Oku, Masatoshi Ishikawa : A solution of pre-tension membrane for improving the usability of liquid-membrane-liquid lens in its weak power area, 2nd EOS Conference on Optofluidics (EOSOF 2013) (Munich, 2013.5.14) / Abstract 1569716891 (Oral Session)
  • Hiromasa Oku, Kazuma Tsukamoto, Masatoshi Ishikawa : Measurement of temporal response characteristics of liquid-liquid interface with a pinned contact line for high-speed liquid lens design, 2nd EOS Conference on Optofluidics (EOSOF 2013) (Munich, 2013.5.14) / Abstract 1569714639_002 (Poster)
  • Lihui Wang, Hiromasa Oku, Masatoshi Ishikawa : Development of variable-focal lens with liquid-membrane-liquid structure and 30mm optical aperture, SPIE Photonics West 2013 (San Francisco, 2013.2.7) / Proceedings 8617-5 (Oral Session)
  • Hiroki Deguchi, Hiromasa Oku, Masatoshi Ishikawa : Arbitrarily Focused Video Using High-speed Liquid Lens (Poster), 5th ACM SIGGRAPH Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia (SIGGRAPH ASIA 2012) (Singapore, 2012.11.29-30)
  • Lihui Wang, Hiromasa Oku, Masatoshi Ishikawa : A Liquid Lens with Liquid-Membrane-Liquid Structure, Frontiers in Optics 2012, OSA's 96th annual meeting (Rochester, NY, 2012.10.15) / Technical Digest, FM3A.3 (Oral Session), http://www.opticsinfobase.org/abstract.cfm?URI=FiO-2012-FM3A.3
  • Kohei Okumura, Hiromasa Oku and Masatoshi Ishikawa : Lumipen: Projection-Based Mixed Reality for Dynamic Objects, 2012 IEEE International Conference on Multimedia and Expo (ICME 2012) (Melbourne, 2012.7.11) / Conference Proceedings, pp.699-704
  • Kohei Okumura, Hiromasa Oku and Masatoshi Ishikawa : High-Speed Gaze Controller for Millisecond-order Pan/tilt Camera, 2011 IEEE International Conference on Robotics and Automation (ICRA 2011) (Shanghai, 2011.5.12) / Conference Proceedings, pp.6186-6191 [PDF (1.3MB)]*IEEE
  • Hiromasa Oku and Masatoshi Ishikawa : High-Speed Liquid lens for Computer Vision, 2010 IEEE International Conference on Robotics and Automation (ICRA 2010) (Anchorage, 2010.5.5) / Conference Proceedings, pp.2643-2648 [PDF (1.6MB)]*IEEE
  • Hiromasa Oku and Masatoshi Ishikawa : High-speed liquid lens with 2-ms response and 80.3-nm root-mean-square wavefront error, SPIE Photonics West 2010 (San Francisco, 2010.1.25) / Proceedings, 7594-07 (Oral Session) [PDF (2.1MB)]
  • Nobuyuki Mizoguchi, Hiromasa Oku, and Masatoshi Ishikawa : High-speed variable-focus optical system for extended depth of field, IEEE International Symposium on Industrial Electronics (ISIE 2009) (Seoul, 2009.7.8) / Proceedings, pp.1668-1673 [PDF (988K)]*IEEE (Oral Session)
  • Hiromasa Oku, Naoko Ogawa, Kogiku Shiba, Manabu Yoshida, and Masatoshi Ishikawa : How to Track Spermatozoa using High-Speed Visual Feedback, 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2008) (Vancouver, 2008.8.21) / Proceedings, pp.125-128 [PDF (1.5M)] *IEEE (Oral Session)
  • Takahiko Ishikawa, Hiromasa Oku, Masatoshi Ishikawa : Mobile microscope: A new concept for hand-held microscopes with image stabilization, 2008 IEEE International Conference on Robotics and Automation (ICRA 2008) (Pasadena, 2008.5.23) / Conference Proceedings, pp.3130-3134 [PDF (949K)] *IEEE
  • Takeshi Hasegawa, Naoko Ogawa, Hiromasa Oku and Masatoshi Ishikawa : A New Framework for Microrobotic Control of Motile Cells based on High-Speed Tracking and Focusing, 2008 IEEE International Conference on Robotics and Automation (ICRA 2008) (Pasadena, 2008.5.23) / Conference Proceedings, pp.3964-3969 [PDF (1.4M)] *IEEE *IEEE RAS Japan Chapter Young Award*
  • Soshiro Makise, Hiromasa Oku, and Masatoshi Ishikawa : Serial Algorithm for High-speed Autofocusing of Cells using Depth From Diffraction (DFDi) Method, 2008 IEEE International Conference on Robotics and Automation (ICRA 2008) (Pasadena, 2008.5.23) / Conference Proceedings, pp.3124-3129 [PDF (4.1M)] *IEEE
  • Anchelee Davies, Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Visualization and Estimation of Contact Stimuli using Living Microorganisms, 2006 IEEE International Conference on Robotics and Biomimetics (ROBIO 2006) (Kunming, 2006.12.18) / Proceedings, pp.445-450 [PDF (316K)] *IEEE *Best Paper in Biomimetics*
  • Hiromasa Oku, Masatoshi Ishikawa : Rapid Liquid Variable-Focus Lens with 2-ms Response, 19th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS 2006) (Montreal, 2006.11.2) / Proceedings, pp.947-948 [PDF (527K)] *IEEE
  • Koichi Hashimoto, Kiyonori Takahashi, Naoko Ogawa, and Hiromasa Oku : Visual Feedback Control for a Cluster of Microorganisms, SICE-ICASE International Joint Conference 2006 (SICE-ICCAS 2006) (Busan, 2006.10.20) / Proceedings, pp.4198-4201
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Dynamics Modeling and Real-Time Observation of Galvanotaxis in Paramecium caudatum toward Robotic Maneuvering, The 3rd International Symposium on Aero Aqua Bio-mechanisms (ISABMEC 2006) (Okinawa, 2006.7.5) / Proceedings, P02
  • Hiromasa Oku, Theodorus, Koichi Hashimoto, and Masatoshi Ishikawa : High-speed Focusing of Cells Using Depth-From-Diffraction Method, 2006 IEEE International Conference on Robotics and Automation (ICRA 2006) (Orlando, 2006.5.18) / Proceedings, pp.2626-2641 [PDF (716K)] *IEEE
  • Kiyonori Takahashi, Naoko Ogawa, Hiromasa Oku, and Koichi Hashimoto : Organized Motion Control of a lot of Microorganisms Using Visual Feedback, 2006 IEEE International Conference on Robotics and Automation (ICRA 2006) (Orlando, 2006.5.16) / Proceedings, pp.1408-1413 [PDF (3.1M)] *IEEE
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Evaluation and Suppression of Overrun of Microorganisms using Dynamics Model for Microrobotic Application, 9th International Conference on Intelligent Autonomous Systems (IAS-9) (Kashiwa, 2006.3.8) / Intelligent Autonomous Systems 9 (T. Arai et al. Eds.), pp.1015-1024, IOS Press
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Microrobotic Control of Paramecium Cells using Galvanotaxis, 2005 IEEE International Conference on Robotics and Biomimetics (ROBIO 2005) (Macau, 2005.7.3) / ROBIO'05 Workshop on Biomimetic Robotics and Biomimetic Control, pp.23-35
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Dynamic Model of Paramecium Galvanotaxis for Microrobotic Application, 2005 IEEE International Conference on Robotics and Automation (ICRA 2005) (Barcelona, 2005.4.19) / Proceedings, pp. 1258-1263 [PDF (341K)] *IEEE
  • Hiromasa Oku, Naoko Ogawa, Koichi Hashimoto, and Masatoshi Ishikawa : Microorganism Tracking Microscope System, 2005 IEEE International Conference on Robotics and Automation (ICRA 2005) (Barcelona, 2005.4.18-22) / Video Proceedings [Video (WMV, 20M)] [PDF (112K)] *IEEE
  • Theodorus, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Optical axis tracking of microorganism using high speed vision, Focus on Microscopy 2005 (Jena, 2005.3.22) / Program and Abstract Book, p.105
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Motile Cell Galvanotaxis Control using High-Speed Tracking System, 2004 IEEE International Conference on Robotics and Automation (ICRA 2004) (New Orleans, 2004.4.28) / Proceedings, pp.1646-1651 [PDF (1.7M)] *IEEE
  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Single-cell level continuous observation of microorganism galvanotaxis using high-speed vision, 2004 IEEE International Symposium on Biomedical Imaging (ISBI 2004) (Arlington, 2004.4.18) / Proceedings, pp.1331-1334 [PDF (1.0M)] *IEEE
  • Hiromasa Oku, and Masatoshi Ishikawa : A Variable-Focus Lens with 1kHz Bandwidth Applied to Axial-Scan of A Confocal Scanning Microscope, 16th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS 2003) (Tucson, 2003.10.26-30) / Proceedings, Vol.1, pp.309-310 [PDF (459K)] *IEEE
  • Hiromasa Oku, Idaku Ishii, and Masatoshi Ishikawa : Tracking a Protozoon Using High-Speed Visual Feedback, 1st Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine & Biology(Lyon, France, Oct. 12-14, 2000) / Proceedings, pp.156-159.

Media

Newspaper

Web

*IEEE © 2001-2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

*AIP © 2005, 2009, 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The article appeared in L. Wang et al.,Appl. Phys. Lett. 102, 131111 (2013) and may be found at http://link.aip.org/link/?APL/102/131111. The article appeared in H. Oku et al.,Appl. Phys. Lett. 94, 221108 (2009) and may be found at http://link.aip.org/link/?APL/94/221108. The article appeared in H. Oku et al.,Rev. Sci. Instrum. 76, 034301 (2005) and may be found at http://link.aip.org/link/?RSINAK/76/034301/1.

*Elsevier © 2006 Elsevier B.V.

Ishikawa Oku Laboratory, Department of Information Physics and Computing, Department of Creative Informatics,
Graduate School of Information Science and Technology, University of Tokyo
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Ishikawa Oku Laboratory WWW admin: www-admin@k2.t.u-tokyo.ac.jp