Summary form only given. Conventional lenses are based on refraction, while a Fresnel binary lens operates by diffraction. Fresnel lenses offer the ability to perform unique beam manipulation and frequency-dependent focusing. The linearly frequency-dependent focal length of a Fresnel lens allows tomographic imaging of a target using multiple frequencies. Objects at various locations along the beam propagation path are uniquely imaged on the same imaging plane using a Fresnel lens with different frequencies of the imaging beam. This procedure allows the reconstruction of an object's tomographic contrast image by assembling the frequency-dependent images, and provides a new tomographic imaging modality.
Tomographic imaging with terahertz pulses
The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society ; 2 ; 528-529 vol.2
2002-01-01
126029 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
WU2 Tomographic Imaging with Terahertz Pulses
British Library Conference Proceedings | 2002
|Multiply scattered broadband terahertz pulses
IEEE | 2004
|MEMS tomographic imaging system simulation
IEEE | 2009
|