Design and analysis of quasi-optical THz time domain imaging systems

Claudia Brückner; Boris Pradarutti; Ralf Müller; Stefan Riehemann; Gunther Notni; Andreas Tünnermann

doi:10.1117/12.797606

27 September 2008 Design and analysis of quasi-optical THz time domain imaging systems

Claudia Brückner, Boris Pradarutti, Ralf Müller, Stefan Riehemann, Gunther Notni, Andreas Tünnermann

Proceedings Volume 7100, Optical Design and Engineering III; 71000S (2008) https://doi.org/10.1117/12.797606
Event: Optical Systems Design, 2008, Glasgow, Scotland, United Kingdom

Abstract

A THz time domain imaging system is optimized and analyzed with ZEMAX. The requirements to the optical design of time domain imaging systems in the THz spectral region are deduced. A system is presented, which is diffraction-limited for wavelengths down to 838 μm and field points up to ±4 mm. In the optical system a 90° off-axis parabolic mirror is combined with an aspheric plastic lens. The lens was made from ZEONEX E48R®, and it was manufactured by ultraprecision machining. A resolution test of the system shows that on time domain analysis of the pulse maximum on-axis 1 LP/mm can be resolved with an intensity contrast of 0.22. The resolution of the outermost field point is 0.67 LP/mm with an intensity contrast of 0.23. An outlook of an optimized system for imaging a field of ±10 mm in x- and y-direction is given.

Citation Download Citation

Claudia Brückner, Boris Pradarutti, Ralf Müller, Stefan Riehemann, Gunther Notni, and Andreas Tünnermann "Design and analysis of quasi-optical THz time domain imaging systems", Proc. SPIE 7100, Optical Design and Engineering III, 71000S (27 September 2008); https://doi.org/10.1117/12.797606

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