Passive terahertz camera for standoff security screening

E. Grossman; C. Dietlein; J. Ala-Laurinaho; Mikko Leivo; Leif Grönberg; Markus Grönholm; Petteri Lappalainen; Anssi Rautiainen; A. Tamminen; Arttu Luukanen

doi:10.1364/AO.49.00E106

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 journal › Article › Scientific › peer-review

122 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 language	English
Pages (from-to)	E106-E120
Number of pages	15
Journal	Applied Optics
Volume	49
Issue number	19
DOIs	https://doi.org/10.1364/AO.49.00E106
Publication status	Published - 2010
MoE publication type	A1 Journal article-refereed

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10.1364/AO.49.00E106

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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.",

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T1 - Passive terahertz camera for standoff security screening

AU - Grossman, E.

AU - Dietlein, C.

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

Y1 - 2010

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AB - 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.

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DO - 10.1364/AO.49.00E106

M3 - Article

SN - 1559-128X

VL - 49

SP - E106-E120

JO - Applied Optics

JF - Applied Optics

IS - 19

ER -

Passive terahertz camera for standoff security screening

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