Photon-sparse microscopy: Trans-wavelength ghost imaging

Reuben S. Aspden, Nathan R Gemmell, Peter A. Morris, Daniel S Tasca, Lena Mertens, Michael George Tanner, Robert A. Kirkwood, Alessandro Ruggeri, Alberto Tosi, Robert W. Boyd, Gerald Stuart Buller, Robert H. Hadfield, Miles J. Padgett

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Ghost imaging systems use down-conversion sources that produce twin output beams of position-correlated photons to produce an image of an object using photons that did not interact with the object. One of these beams illuminates the object and is detected by a single pixel detector while the image information is recovered from the second, spatially correlated, beam. We utilize this technique to obtain images of objects probed with 1.5μm photons whilst developing the image using a highly efficient, low-noise, photon-counting camera detecting the correlated photons at 460nm. The efficient transfer of the image information from infrared illumination to visible detection wavelengths and the ability to count single-photons allows the acquisition of an image while illuminating the object with an optical power density of only 100 pJ cm-2 s-1. We apply image reconstruction techniques based on compressive sensing to reconstruct our images from data sets containing far fewer photons than conventionally required. This wavelength-transforming ghost imaging technique has potential for the imaging of light-sensitive specimens or where covert operation is desired.

Original languageEnglish
Title of host publicationChemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII
EditorsAugustus W. Fountain III
ISBN (Electronic)9781510600652
Publication statusPublished - 12 May 2016
Event17th Meeting of the Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing Conference 2016 - Baltimore, United States
Duration: 18 Apr 201620 Apr 2016

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


Conference17th Meeting of the Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing Conference 2016
Country/TerritoryUnited States


  • Ghost imaging
  • Infrared imaging
  • Wavelength conversion. Microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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