Super-resolution in digital holography by a two-dimensional dynamic phase grating
Anno: 2008
Autori: Paturzo M., Merola F., Grilli S., De Nicola S., Finizio A., Ferraro P.
Affiliazione autori: CNR – Istituto Nazionale di Ottica Applicata, via Campi Flegrei 34, 80078-Pozzuoli (NA), Italy;
CNR – Istituto di Cibernetica, via Campi Flegrei 34, 80078-Pozzuoli (NA), Italy;
Dipartimento di Fisica, Università di Napoli “Federico II”, via Cintia, I-80126 Napoli, Italy
Abstract: An approach that uses an electro-optically tunable two dimensional phase grating to enhance the resolution in digital holographic microscopy is proposed. We show that, by means of a flexible hexagonal phase grating, it is possible to increase the numerical aperture of the imaging system, thus improving the spatial resolution of the images in two dimensions. The augment of the numerical aperture of the optical system is obtained by recording spatially multiplexed digital holograms. The grating tuneability allows one to adjust the intensity among the spatially multiplexed holograms maximizing the grating diffraction efficiency. Furthermore we demonstrate that the flexibility of the numerical reconstruction allows one to use selectively the diffraction orders carrying useful information for increasing the spatial resolution. The proposed approach can improve the capabilities of digital holography in three-dimensional imaging and microscopy. (C) 2008 Optical Society of America
Giornale/Rivista: OPTICS EXPRESS
Volume: 16 (21) Da Pagina: 17107 A: 17118
Maggiori informazioni: The research leading to these results has received funding from the European CommunityDOI: 10.1364/OE.16.017107Citazioni: 118dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-21Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui