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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 21 — Oct. 21, 2013
  • pp: 24452–24459

A Nipkow disk integrated with Fresnel lenses for terahertz single pixel imaging

Chong Li, James Grant, Jue Wang, and David R. S. Cumming  »View Author Affiliations


Optics Express, Vol. 21, Issue 21, pp. 24452-24459 (2013)
http://dx.doi.org/10.1364/OE.21.024452


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Abstract

We present a novel Nipkow disk design for terahertz (THz) single pixel imaging applications. A 100 mm high resistivity (ρ≈3k-10k Ω·cm) silicon wafer was used for the disk on which a spiral array of twelve 16-level binary Fresnel lenses were fabricated using photolithography and a dry-etch process. The implementation of Fresnel lenses on the Nipkow disk increases the THz signal transmission compared to the conventional pinhole-based Nipkow disk by more than 12 times thus a THz source with lower power or a THz detector with lower detectivity can be used. Due to the focusing capability of the lenses, a pixel resolution better than 0.5 mm is in principle achievable. To demonstrate the concept, a single pixel imaging system operating at 2.52 THz is described.

© 2013 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(110.0110) Imaging systems : Imaging systems
(050.1965) Diffraction and gratings : Diffractive lenses
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Imaging Systems

History
Original Manuscript: July 9, 2013
Revised Manuscript: September 12, 2013
Manuscript Accepted: September 24, 2013
Published: October 7, 2013

Citation
Chong Li, James Grant, Jue Wang, and David R. S. Cumming, "A Nipkow disk integrated with Fresnel lenses for terahertz single pixel imaging," Opt. Express 21, 24452-24459 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-21-24452


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