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Opt Lett. 2010 Jun 15;35(12):2112-4.

Optical reconstruction of digital holograms recorded at 10.6 microm: route for 3D imaging at long infrared wavelengths.

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  • 1Consiglio Nazionale delle Richerche-Istituto Nazionale di Ottica Via Campi Flegrei 34, 80078 Napoli, Italy. melania.paturzo@ino.it

Abstract

We demonstrate the optical reconstruction in the visible range (0.532 microm) of digital holograms recorded at long IR wavelengths (10.6 microm) by means of a spatial light modulator. By using an integrated recording-reconstruction system, it is, in fact, feasible to achieve direct imaging of holograms acquired outside the visible range, i.e., in the IR spectrum. By choosing a Fourier recording configuration, the reconstructed image, obtained at about a 20 times shorter wavelength than the acquisition image, exhibits minor aberrations, which do not significantly affect the optical reconstruction. The high NA achievable at a long IR wavelength allows us to image large objects at reasonable distances.

PMID:
20548403
[PubMed]
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