Title :
Design of multi-order diffractive THz lenses
Author :
Middendorf, R. ; LeMaster, D.A. ; Zarepoor, M. ; Brown, E.R.
Author_Institution :
Depts. of Phys. & Electr. Eng., Wright State Univ., Dayton, OH, USA
Abstract :
Quadratic, multi-order diffractive lenses have been designed, fabricated, and demonstrated for the MMW-THz region, with the capability of focusing harmonic wavelengths on to a common focal point. Design wavelength and harmonic spacing can be chosen as design parameters, allowing great flexibility in lens design. Simulations were carried out to determine lens parameters and performance. These lenses reduce both spherical and chromatic aberrations at harmonic wavelengths, and are thinner and lighter than traditional refractive elements. This lens type is potentially useful to sensor fusion architectures.
Keywords :
aberrations; diffraction gratings; lenses; optical fabrication; MMW-THz region; chromatic aberrations; common focal point; focusing harmonic wavelengths; harmonic spacing; lens parameters; lens performance; multiorder diffractive THz lenses; quadratic lenses; refractive elements; spherical aberrations; Harmonic analysis; Lenses; Optical device fabrication; Optical diffraction; Optical refraction; Power harmonic filters;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380211