Optical Review

, Volume 12, Issue 6, pp 442–444 | Cite as

Three-Dimensional Flow Tracking in a Micro Channel with High Time Resolution Using Micro Digital-Holographic Particle-Tracking Velocimetry

  • Shin-ichi SatakeEmail author
  • Tomoaki Kunugi
  • Kazuho Sato
  • Tomoyoshi Ito
  • Jun Taniguchi


A micro digital-holographic particle-tracking velocimetry (micro-DHPTV) method for high time-resolution flow field measurement in a micro-channel is developed. The system consists of an objective lens, a high-speed camera and a single high-frequency double pulsed laser. Particle positions in a three-dimensional field can be reconstructed by a computer-generated hologram. The time evolution of a three-dimensional water flow in a semicircular micro-channel of 100-μm width and 40-μm depth is obtained successfully using this micro-DHPTV system. The three-dimensional measurement volume of the system is 410 × 100 × 40 μm3 and is irradiated by one laser beam with the time resolution of 100 μs and a reputation rate of 1 kHz. Consequently, 130 velocity vectors in the semicircular micro-channel can be obtained instantaneously. A significant aspect of this method is that even though both the laser and camera are located in line and perpendicular to the flow direction, velocity vectors can be obtained by reconstructing the particle positions via the computer hologram and the semicircular cross section shape of the micro-channel can be resolved.

Key words

holography computational optics optical computer hologram micro-channel particle tracking velocimetry 


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Copyright information

© The Optical Society of Japan 2005

Authors and Affiliations

  • Shin-ichi Satake
    • 5
    Email author
  • Tomoaki Kunugi
    • 1
  • Kazuho Sato
    • 2
  • Tomoyoshi Ito
    • 3
    • 4
  • Jun Taniguchi
    • 5
  1. 1.Department of Nuclear EngineeringGraduate School of Engineering, Kyoto UniversityYoshida, Sakyo, KyotoJapan
  2. 2.Toyota Industries Corp.Kariya, AichiJapan
  3. 3.Japan Science and Technology Agency (JST)Japan
  4. 4.Department of Electronics and Mechanical EngineeringChiba UniversityInage-ku, ChibaJapan
  5. 5.Department of Applied ElectronicsTokyo University of ScienceNoda, ChibaJapan

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