Abstract
A real-time reflection imaging employing a terahertz (THz) camera as the
imager and a 3.9 THz quantum-cascade laser (QCL) as the light source is
demonstrated. The imaging light is collected and guided by only one off-axis
parabolic mirror. The imaging distance is about 1 m. THz images of a coin and a
knife are acquired and analyzed. An actual spatial resolution with a value of about
0.33 mm is achieved.
© 2014 Chinese Optics Letters
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