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Paper   IPM / Nano-Sciences / 15044
School of Nano Science
  Title:   Super-resolved Mirau digital holography by structured illumination
1.  Yasaman Ganjkhani
2.  Mohammad Charsooghi
3.  Ehsan Akhlaghi
4.  Ali Reza Moradi
  Status:   Published
  Journal: Optics Comm.
  Vol.:  404
  Year:  2017
  Pages:   110
  Publisher(s):   Elsevier B.V.
  Supported by:  IPM
In this paper, we apply structured illumination toward super-resolved 3D imaging in a common-path digital holography arrangement. Digital holographic microscopy (DHM) provides non-invasive 3D images of transparent samples as well as 3D profiles of reflective surfaces. A compact and vibration-immune arrangement for DHM may be obtained through the use of aMirau microscope objective. However, high-magnificationMirau objectives have a low working distance and are expensive. Low-magnification ones, on the other hand, suffer from low lateral resolution. Structured illumination has been widely used for resolution improvement of intensity images, but the technique can also be readily applied to DHM. We apply structured illumination to Mirau DHM by implementing successive sinusoidal gratings with different orientations onto a spatial light modulator (SLM) and forming its image on the specimen.Moreover, we show that, instead of different orientations of 1D gratings, alternative single 2D gratings, e.g. checkerboard or hexagonal patterns, can provide resolution enhancement in multiple directions. Our results show a 35

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