Velocity sensitivity of laser-speckle velocimeters

Shinichi Komatsu, K. Osato, H. Ohzu

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    The method of increasing sensitivity in laser speckle velocimetry is studied theoretically and experimentally. The sensitivity of the velocimeters is shown to have a fairly strong dependence on the optical configurations, such as the diameter of the incident laser beam-waist, or its position relative to the moving diffuse object to be measured. It is pointed out that the minimal sensitivity appears in the configuration where the converging incident light beam produces its beam waist at the position of a detecting pinhole. In some cases when using image speckles to obtain finite spatial resolution in the object plane, an optimum condition exists which gives the maximal sensitivity. The sensitivity of a laser speckle velocimeter using a spatial filter and two point cross-correlation technique is also discussed.

    Original languageEnglish
    Pages (from-to)357-361
    Number of pages5
    JournalOptics Communications
    Volume39
    Issue number6
    DOIs
    Publication statusPublished - 1981 Nov 15

    Fingerprint

    Velocimeters
    Speckle
    Lasers
    sensitivity
    lasers
    Velocity measurement
    Laser beams
    pinholes
    configurations
    light beams
    cross correlation
    spatial resolution
    laser beams
    filters

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Velocity sensitivity of laser-speckle velocimeters. / Komatsu, Shinichi; Osato, K.; Ohzu, H.

    In: Optics Communications, Vol. 39, No. 6, 15.11.1981, p. 357-361.

    Research output: Contribution to journalArticle

    Komatsu, Shinichi ; Osato, K. ; Ohzu, H. / Velocity sensitivity of laser-speckle velocimeters. In: Optics Communications. 1981 ; Vol. 39, No. 6. pp. 357-361.
    @article{8f93477304074c3fb3ad62b32653e96c,
    title = "Velocity sensitivity of laser-speckle velocimeters",
    abstract = "The method of increasing sensitivity in laser speckle velocimetry is studied theoretically and experimentally. The sensitivity of the velocimeters is shown to have a fairly strong dependence on the optical configurations, such as the diameter of the incident laser beam-waist, or its position relative to the moving diffuse object to be measured. It is pointed out that the minimal sensitivity appears in the configuration where the converging incident light beam produces its beam waist at the position of a detecting pinhole. In some cases when using image speckles to obtain finite spatial resolution in the object plane, an optimum condition exists which gives the maximal sensitivity. The sensitivity of a laser speckle velocimeter using a spatial filter and two point cross-correlation technique is also discussed.",
    author = "Shinichi Komatsu and K. Osato and H. Ohzu",
    year = "1981",
    month = "11",
    day = "15",
    doi = "10.1016/0030-4018(81)90222-4",
    language = "English",
    volume = "39",
    pages = "357--361",
    journal = "Optics Communications",
    issn = "0030-4018",
    publisher = "Elsevier",
    number = "6",

    }

    TY - JOUR

    T1 - Velocity sensitivity of laser-speckle velocimeters

    AU - Komatsu, Shinichi

    AU - Osato, K.

    AU - Ohzu, H.

    PY - 1981/11/15

    Y1 - 1981/11/15

    N2 - The method of increasing sensitivity in laser speckle velocimetry is studied theoretically and experimentally. The sensitivity of the velocimeters is shown to have a fairly strong dependence on the optical configurations, such as the diameter of the incident laser beam-waist, or its position relative to the moving diffuse object to be measured. It is pointed out that the minimal sensitivity appears in the configuration where the converging incident light beam produces its beam waist at the position of a detecting pinhole. In some cases when using image speckles to obtain finite spatial resolution in the object plane, an optimum condition exists which gives the maximal sensitivity. The sensitivity of a laser speckle velocimeter using a spatial filter and two point cross-correlation technique is also discussed.

    AB - The method of increasing sensitivity in laser speckle velocimetry is studied theoretically and experimentally. The sensitivity of the velocimeters is shown to have a fairly strong dependence on the optical configurations, such as the diameter of the incident laser beam-waist, or its position relative to the moving diffuse object to be measured. It is pointed out that the minimal sensitivity appears in the configuration where the converging incident light beam produces its beam waist at the position of a detecting pinhole. In some cases when using image speckles to obtain finite spatial resolution in the object plane, an optimum condition exists which gives the maximal sensitivity. The sensitivity of a laser speckle velocimeter using a spatial filter and two point cross-correlation technique is also discussed.

    UR - http://www.scopus.com/inward/record.url?scp=0019632530&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=0019632530&partnerID=8YFLogxK

    U2 - 10.1016/0030-4018(81)90222-4

    DO - 10.1016/0030-4018(81)90222-4

    M3 - Article

    VL - 39

    SP - 357

    EP - 361

    JO - Optics Communications

    JF - Optics Communications

    SN - 0030-4018

    IS - 6

    ER -