用于生物医学应用的全光电子连续波太赫兹成像。

All-optoelectronic continuous wave THz imaging for biomedical applications.

作者信息

Siebert Karsten J, Löffler Torsten, Quast Holger, Thomson Mark, Bauer Tobias, Leonhardt Rainer, Czasch Stephanie, Roskos Hartmut G

机构信息

Physikalisches Institut der J W Goethe-Universität, Robert-Mayer-Street 2-4, D-60054 Frankfurt, Germany.

出版信息

Phys Med Biol. 2002 Nov 7;47(21):3743-8. doi: 10.1088/0031-9155/47/21/310.

DOI:10.1088/0031-9155/47/21/310

PMID:12452562

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.

摘要

我们展示了一种用于离体生物医学应用的全光电子太赫兹成像系统，该系统基于使用光电导天线对两束连续波激光束进行光混频。讨论了双曲面透镜的应用。与离轴抛物面镜相比，双曲面透镜允许f数小于1/2，从而实现更好的聚焦和更高的空间分辨率，而离轴抛物面镜由于实际原因其f数必须大于1/2。针对特定的组织学样本，讨论了图像噪声分析。