Direct recording of holograms by a CCD target and numerical reconstruction

Schnars, Ulf; Jüptner, Werner

doi:10.1364/ao.33.000179

Cited by 1,285 publications

(629 citation statements)

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“…Schnars [3] notes that a DH reconstruction has an advantage over an optical reconstruction in that it has phase information.…”

Section: Direct and Spectral Methods Of Reconstructionmentioning

confidence: 99%

“…Digital holography [1,2,3] differs from holography in that an electronic sensor, rather than photographic material, is used to capture a hologram during the recording step. In addition the reconstructions are performed numerically on a computer instead of physically reconstructing the hologram.…”

Section: Introductionmentioning

confidence: 99%

“…In addition the reconstructions are performed numerically on a computer instead of physically reconstructing the hologram. In 1994, Schnars and Jüptner [3] were the first to successfully capture Fresnel holograms with a CCD sensor. These digital holograms, like their analogue counterparts, require light that has a high level of coherence and therefore suffer from the effects of speckle noise.…”

Section: Introductionmentioning

confidence: 99%

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Speckle reduction of reconstructions of digital holograms using three dimensional filtering

Maycock

McDonald

Hennelly

2013

Optics Communications

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We report on a new digital signal processing technique that reduces speckle in reconstructions of digital holograms. This is achieved by convolving the three dimensional intensity pattern (the intensity of the propagated DH at a series of different distances) with a 3D point spread function in all three dimensions (x,y,z ). It is based on the fact that the addition of different independent speckle images on an intensity basis reduces the speckle content. We provide quantitative results in terms of speckle index and resolution, and show that filtering in the z direction has the added benefit of an increase the depth of focus of the digital hologram reconstruction.

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“…Schnars [3] notes that a DH reconstruction has an advantage over an optical reconstruction in that it has phase information.…”

Section: Direct and Spectral Methods Of Reconstructionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Speckle reduction of reconstructions of digital holograms using three dimensional filtering

Maycock

McDonald

Hennelly

2013

Optics Communications

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show abstract

“…No images are optically reconstructed here, but a 3D image of the sample can be recovered by computing the back propagation of the wavefronts. This technique is named Digital Holography (DH) [5,6]. If compared to optical microscopy, this technique takes a remarkable advantage from the capability to get 3D images of thick samples.…”

Section: Microscopy Techniquesmentioning

confidence: 99%

A new particle sizing technique based on near field scattering

Potenza

Pescini

Magatti

et al. 2006

Nuclear Physics B - Proceedings Supplements

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We present a novel technique for particle sizing based on recent studies about the statistical information contained within the light intensity distribution close to a disordered sample. We show that it is much simpler and more robust than the traditional light scattering methods and any imaging technique. Applications to optical diagnostics, process monitoring and pollution monitoring are expected. In principle, since the basic phenomenon is wavelength independent, radiation other than visible light can be used.

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“…In 1967, J. Goodman demonstrated the feasibility of numerical reconstruction of an image from a Fourier hologram detected by a vidicon camera [8]. Schnars and Jueptner, in 1994, were the first to use a CCD camera directly connected to a computer as the input and compute the image in a Fresnel holography set up [9]. In the last decade or so, many powerful and useful techniques and applications of DH have been developed.…”

Section: Introductionmentioning

confidence: 99%

Applications of Digital Holography in Biomedical Microscopy

Kim

2010

Journal of the Optical Society of Korea

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Digital holography (DH) is a potentially disruptive new technology for many areas of imaging science, especially in microscopy and metrology. DH offers a number of significant advantages such as the ability to acquire holograms rapidly, availability of complete amplitude and phase information of the optical field, and versatility of the interferometric and image processing techniques. This article provides a review of the digital holography, with an emphasis on its applications in biomedical microscopy. The quantitative phase microscopy by DH is described including some of the special techniques such as optical phase unwrapping and holography of total internal reflection. Tomographic imaging by digital interference holography (DIH) and related methods is described, as well as its applications in ophthalmic imaging and in biometry. Holographic manipulation and monitoring of cells and cellular components is another exciting new area of research. We discuss some of the current issues, trends, and potentials.

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Direct recording of holograms by a CCD target and numerical reconstruction

Abstract: The principle of recording holograms directly on a CCD target is described. A real image of the object is reconstructed from the digitally sampled hologram by means of numerical methods.

Cited by 1,285 publications

References 1 publication

Speckle reduction of reconstructions of digital holograms using three dimensional filtering

Speckle reduction of reconstructions of digital holograms using three dimensional filtering

A new particle sizing technique based on near field scattering

Applications of Digital Holography in Biomedical Microscopy

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