Passive terahertz camera for standoff security screening

E. Grossman (Corresponding Author), C. Dietlein, J. Ala-Laurinaho, Mikko Leivo, Leif Grönberg, Markus Grönholm, Petteri Lappalainen, Anssi Rautiainen, A. Tamminen, Arttu Luukanen

    Research output: Contribution to journalArticleScientificpeer-review

    78 Citations (Scopus)

    Abstract

    We describe the construction and performance of a passive, real-time terahertz camera based on a modular, 64-element linear array of cryogenic hotspot microbolometers. A reflective conical scanner sweeps out a 2m×4m (vertical×horizontal) field of view (FOV) at a standoff range of 8m. The focal plane array is cooled to 4K in a closed cycle refrigerator, and the signals are detected on free-standing bridges of superconducting Nb or NbN at the feeds of broadband planar spiral antennas. The NETD of the focal-plane array, referred to the target plane and to a frame rate of 5s−1, is 1.25K near the center of the array and 2K overall.
    Original languageEnglish
    Pages (from-to)E106-E120
    Number of pages15
    JournalApplied Optics
    Volume49
    Issue number19
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Focal plane arrays
    focal plane devices
    Screening
    screening
    Closed cycle machinery
    Cameras
    cameras
    spiral antennas
    Spiral antennas
    closed cycles
    refrigerators
    Antenna feeders
    linear arrays
    Cryogenics
    scanners
    cryogenics
    field of view
    broadband

    Cite this

    Grossman, E., Dietlein, C., Ala-Laurinaho, J., Leivo, M., Grönberg, L., Grönholm, M., ... Luukanen, A. (2010). Passive terahertz camera for standoff security screening. Applied Optics, 49(19), E106-E120. https://doi.org/10.1364/AO.49.00E106
    Grossman, E. ; Dietlein, C. ; Ala-Laurinaho, J. ; Leivo, Mikko ; Grönberg, Leif ; Grönholm, Markus ; Lappalainen, Petteri ; Rautiainen, Anssi ; Tamminen, A. ; Luukanen, Arttu. / Passive terahertz camera for standoff security screening. In: Applied Optics. 2010 ; Vol. 49, No. 19. pp. E106-E120.
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    abstract = "We describe the construction and performance of a passive, real-time terahertz camera based on a modular, 64-element linear array of cryogenic hotspot microbolometers. A reflective conical scanner sweeps out a 2m×4m (vertical×horizontal) field of view (FOV) at a standoff range of 8m. The focal plane array is cooled to 4K in a closed cycle refrigerator, and the signals are detected on free-standing bridges of superconducting Nb or NbN at the feeds of broadband planar spiral antennas. The NETD of the focal-plane array, referred to the target plane and to a frame rate of 5s−1, is 1.25K near the center of the array and 2K overall.",
    author = "E. Grossman and C. Dietlein and J. Ala-Laurinaho and Mikko Leivo and Leif Gr{\"o}nberg and Markus Gr{\"o}nholm and Petteri Lappalainen and Anssi Rautiainen and A. Tamminen and Arttu Luukanen",
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    Grossman, E, Dietlein, C, Ala-Laurinaho, J, Leivo, M, Grönberg, L, Grönholm, M, Lappalainen, P, Rautiainen, A, Tamminen, A & Luukanen, A 2010, 'Passive terahertz camera for standoff security screening', Applied Optics, vol. 49, no. 19, pp. E106-E120. https://doi.org/10.1364/AO.49.00E106

    Passive terahertz camera for standoff security screening. / Grossman, E. (Corresponding Author); Dietlein, C.; Ala-Laurinaho, J.; Leivo, Mikko; Grönberg, Leif; Grönholm, Markus; Lappalainen, Petteri; Rautiainen, Anssi; Tamminen, A.; Luukanen, Arttu.

    In: Applied Optics, Vol. 49, No. 19, 2010, p. E106-E120.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Grossman, E.

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    AU - Ala-Laurinaho, J.

    AU - Leivo, Mikko

    AU - Grönberg, Leif

    AU - Grönholm, Markus

    AU - Lappalainen, Petteri

    AU - Rautiainen, Anssi

    AU - Tamminen, A.

    AU - Luukanen, Arttu

    PY - 2010

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    Grossman E, Dietlein C, Ala-Laurinaho J, Leivo M, Grönberg L, Grönholm M et al. Passive terahertz camera for standoff security screening. Applied Optics. 2010;49(19):E106-E120. https://doi.org/10.1364/AO.49.00E106