Investigations on time stability of passive THz imaging

Marcin Kowalski; Norbert Palka; Marek Zyczkowski; Mieczyslaw Szustakowski

doi:10.1117/12.2064965

7 October 2014 Investigations on time stability of passive THz imaging

Marcin Kowalski, Norbert Palka, Marek Zyczkowski, Mieczyslaw Szustakowski

Proceedings Volume 9252, Millimetre Wave and Terahertz Sensors and Technology VII; 92520S (2014) https://doi.org/10.1117/12.2064965
Event: SPIE Security + Defence, 2014, Amsterdam, Netherlands

Abstract

Terahertz radiation is within the frequency range from 100 GHz to 10THz. This radiation has specific characteristics in terms of imaging. The radiation is harmless to the human body because the energy transferred by electromagnetic waves in this range of frequencies are very small thus there is no ionization of matter. The development of imaging devices and exploration of new spectral bands is a chance to introduce new equipment for assuring public safety. It has been proved that objects hidden under clothing can be detected and visualized using terahertz (THz) cameras. However, passive THz cameras still offer too low image resolution for objects recognition. In order to determine the properties of terahertz imaging for detection of hidden objects several aspects need to be considered. Taking into account the fact that the image captured by the terahertz camera reflects the spatial distribution of the relative temperature of the observed objects, the effect of the measurement time on the imaging capabilities should be examined. A very important aspect is the influence of the type (material composition) of coating material, as well as the type of an object hidden under clothing (size and material). The purpose of the studies is to investigate the time stability of passive THz imaging on 250 GHz for detection of concealed objects. In the article, we present the measurement setup, the measurement methodology as well as the initial results of measurements with various types of clothing and test objects.

Citation Download Citation

Marcin Kowalski, Norbert Palka, Marek Zyczkowski, and Mieczyslaw Szustakowski "Investigations on time stability of passive THz imaging", Proc. SPIE 9252, Millimetre Wave and Terahertz Sensors and Technology VII, 92520S (7 October 2014); https://doi.org/10.1117/12.2064965

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Terahertz radiation

Cameras

Imaging systems

Temperature metrology

Millimeter wave imaging

Image resolution

Millimeter wave sensors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years