All-optoelectronic continuous wave THz imaging for biomedical applications
- 16 October 2002
- journal article
- research article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 47 (21) , 3743-3748
- https://doi.org/10.1088/0031-9155/47/21/310
Abstract
We present an all-optoelectronic THz imaging system for ex vivo biomedical applications based on photomixing of two continuous-wave laser beams using photoconductive antennas. The application of hyperboloidal lenses is discussed. They allow for f-numbers less than 1/2 permitting better focusing and higher spatial resolution compared to off-axis paraboloidal mirrors whose f-numbers for practical reasons must be larger than 1/2. For a specific histological sample, an analysis of image noise is discussed.Keywords
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