Title :
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
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;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956302
