Quasi-optical design and Focal Plane Array for THz and millimeter wave imaging systems Dr. Amir Abramovich
Department of Electrical and Electronic Engineering, Ariel University Center of Samaria, Ariel, Israel
Millimeter Wave (MMW) and THz imaging offer relatively high resolution compared to RF and microwave, with good penetration through dielectrics. Those properties enable the development of active MMW and THz imaging systems for medicine, space, industry and homeland security. Passive THz and MMW imaging systems are advantageous since they don’t require illumination of the object or target, but they do require very sensitive detectors which are expensive.
Our research activities focus on the design of large aperture mirrors, Glow Discharge Detector (GDD) technology which is a very inexpensive plasma detector and special Focal Plane Array (FPA) reflectors in order to increase the responsivity of each pixel. The design of the imaging system is based on geometrical optics as a first approximation, and the use of Gaussian beam propagation theory and diffraction effects in order to optimize the design. Inexpensive GDD devices facilitate development of real time FPA imaging. Furthermore, we employ DSP and super-resolution methods in order to improve the MMW image quality. In the framework of this study we will present some MMW images from our 8X8 FPA and 2X18 row scanner based on GDD FPA technology.
Dr. Amir Abramovich is a researcher and staff of the department of Electrical and Electronic Engineering in Ariel University Center of Samaria. Dr. Abramovich is the head of the millimeter and sub-millimeter wave (MMW and THz) research laboratory. Dr. Abramovich involved in the development of new technology of THz detector and THz focal plane arrays for THz imaging. He is also involved in the design of quasi optical components for THz and MMW imaging systems. Dr. Abramovich investigates the properties and spectroscopy of materials (thin films, powders, liquids and gases) in THz and MIR (Mid InfraRed) using unique measurements methods. Those measurements methods include FTIR, ATR-FTIR, frequency domain spectroscopy and time domain spectroscopy. An investigation of THz and MMW meta-materials is also part of Dr. Abramovich research. In the frame of his research work Dr. Abramovich has receive research grants from Ministry of Defense, Ministry of science, commercial companies and from the US Army.
Dr. Abramovich received his PhD. at 2001 from Tel-Aviv University. He received his M.Sc. and B.Sc. at 1991 and 1989 respectively in the field of Electro-Optic Engineering from Ben Gurion University. Dr. Abramovich was employed by TAAS Israel Industries in the Counter Measures and spectroscopic characterization department.