High resolution digital holographic microscopy with a wide field of view based on a synthetic aperture technique and use of linear CCD scanning

Jianglei Di, Jianlin Zhao, Hongzhen Jiang, Peng Zhang, Qi Fan, Weiwei Sun

Research output: Contribution to journalArticlepeer-review

126 Scopus citations

Abstract

Theoretical analysis shows that, to improve the resolution and the range of the field of view of the reconstructed image in digital lensless Fourier transform holography, an effective solution is to increase the area and the pixel number of the recorded digital hologram. A new approach based on the synthetic aperture technique and use of linear CCD scanning is presented to obtain digital holographic images with high resolution and a wide field of view. By using a synthetic aperture technique and linear CCD scanning, we obtained digital lensless Fourier transform holograms with a large area of 3.5 cm x 3.5 cm (5000 x 5000 pixels). The numerical reconstruction of a 4 mm object at a distance of 14 cm by use of a Rayleigh-Sommerfeld integral shows that a theoretically minimum resolvable distance of 2.57 μm can be achieved at a wavelength of 632.8 nm. The experimental results are consistent with the theoretical analysis.

Original languageEnglish
Pages (from-to)5654-5659
Number of pages6
JournalApplied Optics
Volume47
Issue number30
DOIs
StatePublished - 20 Oct 2008

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