Analysis and optimization of THz imaging optics with off-axis parabolic mirrors

Author

Shijun Sung ; Garritano, James ; Bajwa, Neha ; Nowroozi, Bryan ; Grundfest, Warren ; Taylor, Zeike

Author_Institution

Dept. of Electr. Eng., Univ. of California, Los Angeles, Los Angeles, CA, USA

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

Design considerations for an off-axis parabolic mirror based THz imaging systems are presented. The distortion of THz field and its polarization profile are shown for two different configurations of off-axis parabolic mirror trains. The field and polarization distortions along the propagation path are compared with different f/# mirrors. The distortion effects were cancelled out by symmetric orientation of mirrors that recovers the original source profile. Comparisons of field profiles between compensated (symmetric) and uncompensated (antisymmetric) design are shown. Symmetric mirror pairs also rewinds rotation of polarization. This discussion points to an important design considerations for THz imaging systems that utilize OAP mirrors.

Keywords

light polarisation; light propagation; light sources; mirrors; optical design techniques; optical rotation; optimisation; terahertz wave imaging; antisymmetric design; off-axis parabolic mirror design; optical propagation path; optical source profile; optimization; polarization rotation; terahertz field distortion; terahertz imaging optics; Mirrors; Optical distortion; Optical imaging; Optical polarization; Optical reflection; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956302

Filename

6956302