Title :
Enhancement of contrast and spatial resolution in confocal coherent terahertz imaging system
Author :
Zinovev, N.N. ; Andrianov, A.V. ; Gallant, A.J. ; Chamberlain, J.M.
Author_Institution :
A.F. Ioffe Phys. Tech. Inst., St. Petersburg, Russia
Abstract :
The effect of enhancement of image contrast and spatial resolution without the loss of the spectral composition of the radiation under investigation has been experimentally demonstrated for a terahertz far-field imaging system. The result has been obtained by using a confocal aperture placed in the intermediate-focus region of the optical system. The result is a fundamental advance towards the achievement of subwavelength resolution and the contrast of microscopy systems in the terahertz spectral range.
Keywords :
terahertz wave imaging; confocal aperture; confocal coherent terahertz far-field imaging system; image contrast; intermediate-focus region; microscopy systems; optical system; radiation spectral composition; spatial resolution; subwavelength resolution; terahertz spectral range; Gratings; Optical filters; Optical imaging; Phantoms; Spatial resolution;
Conference_Titel :
Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010 35th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-6655-9
DOI :
10.1109/ICIMW.2010.5612863
