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  • IOP Publishing  (3)
  • Omori, Ryota  (3)
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  • IOP Publishing  (3)
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  • 1
    Online Resource
    Online Resource
    Rotation of Optically Trapped Particles in Air
    IOP Publishing ; 1999
    In:  Japanese Journal of Applied Physics Vol. 38, No. 7A ( 1999-07-01), p. L743-
    Details
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 38, No. 7A ( 1999-07-01), p. L743-
    Abstract: We have demonstrated optically induced rotation of microscopic dielectric particles in air. The particles were anisotropically shaped, and were simultaneously trapped three-dimensionally and rotated about the beam axis, which depended solely on the radiation pressure of an extremely focused laser light. It was observed that the rotational speed was linearly dependent on the irradiated beam power and the slope of the fitting lines revealed up to 860 rpm/mW for 3.0 µm-diameter-particles and 540 rpm/mW for 4.0 µm-diameter-particles, which was much higher than the previously reported values measured in water. This technique will be useful for micromotors and microfans assembled in microelectromechanical systems.
    Type of Medium: Online Resource
    ISSN: 0021-4922 , 1347-4065
    URL: Article
    DOI: 10.1143/JJAP.38.L743
    RVK:
    UA 4210.1
    RVK:
    UA 4210.2
    RVK:
    UA 4210
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 1999
    detail.hit.zdb_id: 218223-3
    detail.hit.zdb_id: 797294-5
    detail.hit.zdb_id: 2006801-3
    detail.hit.zdb_id: 797295-7
    Location Call Number Limitation Availability
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Two-Dimensional Measurement of Rotational Speed of a Diffuse Object Based on Laser Doppler Anemometry
    IOP Publishing ; 1998
    In:  Japanese Journal of Applied Physics Vol. 37, No. 4B ( 1998-04-01), p. L450-
    Details
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 37, No. 4B ( 1998-04-01), p. L450-
    Abstract: A novel measurement method based on laser Doppler anemometry that determines the pure rotational speed of a diffuse object on the condition that its axis of rotation is in a plane perpendicular to the illuminating laser lights is described. The rotating object is illuminated by three parallel laser lights and its rotational speed is calculated from beat frequencies resulting from the mixing of their backscattered lights. To verify the principle, measurements of rotational speed of a brass cylinder were performed for rotational speeds in the range of 30–500 rpm. The measured values have a fairly good agreement with the preselected values over this range. The present method is useful for detection of rotational conditions of machinery components assembled in rotating or vibrating structures.
    Type of Medium: Online Resource
    ISSN: 0021-4922 , 1347-4065
    URL: Article
    DOI: 10.1143/JJAP.37.L450
    RVK:
    UA 4210.1
    RVK:
    UA 4210.2
    RVK:
    UA 4210
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 1998
    detail.hit.zdb_id: 218223-3
    detail.hit.zdb_id: 797294-5
    detail.hit.zdb_id: 2006801-3
    detail.hit.zdb_id: 797295-7
    Location Call Number Limitation Availability
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Forces of a Single-Beam Gradient-Force Optical Trap on Dielectric Spheroidal Particles in the Geometric-Optics Regime
    IOP Publishing ; 1998
    In:  Japanese Journal of Applied Physics Vol. 37, No. 11R ( 1998-11-01), p. 6012-
    Details
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 37, No. 11R ( 1998-11-01), p. 6012-
    Abstract: We developed a computational code to calculate the forces of a single-beam gradient-force optical trap exerted on dielectric ellipsoidal particles in the geometric-optics regime. Using this code, the axial and the transverse trapping stability of spheroidal particles, the semi-major axis of which is perpendicular (type-A) and parallel (type-B) to an incident beam axis, was evaluated and the effects of the nonspherical geometry of the particles were analyzed. As the fractional deformation ratio increased, the axial trapping stability improved for type-B particles, whereas it degraded for type-A particles. It can, therefore, be concluded that type-B particles can be trapped more stably than type-A particles. It was also observed that the axial trapping stability can be improved by the use of a TEM 01 * -mode beam instead of a TEM 00 -mode beam.
    Type of Medium: Online Resource
    ISSN: 0021-4922 , 1347-4065
    URL: Article
    DOI: 10.1143/JJAP.37.6012
    RVK:
    UA 4210.1
    RVK:
    UA 4210.2
    RVK:
    UA 4210
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 1998
    detail.hit.zdb_id: 218223-3
    detail.hit.zdb_id: 797294-5
    detail.hit.zdb_id: 2006801-3
    detail.hit.zdb_id: 797295-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
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