Digital Holography

Schnars, Ulf; Falldorf, Claas; Watson, John; Jüptner, Werner

doi:10.1007/978-3-662-44693-5_3

Cited by 109 publications

(121 citation statements)

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“…Digital Holographic Interferometry (DHI) has been used in this research and was previously applied to the study of the CP layer [22,23]. It is an interferometric technique very similar to classical Holographic Interferometry previously used [24][25][26][27] but replacing the holographic plate, which needs to be photographically developed, by the CCD chip of a video camera [28]. The interferometric techniques are based in the appearance of interference fringes related to changes in the refractive index of an object where a laser beam has passed through.…”

Section: Introductionmentioning

confidence: 99%

Visualization and modeling of the polarization layer in crossflow reverse osmosis in a slit-type channel

Salcedo‐Díaz

García-Algado

Garcia‐Rodriguez

et al. 2014

Journal of Membrane Science

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The evolution of the concentration polarization layer during crossflow reverse osmosis in a slit channel has been studied. Digital Holographic Interferometry allows visualizing the polarization layer as an interference fringe pattern. An especial module with four windows has been designed to see the development of the polarization layer along the membrane channel. Several experiments with a constant transmembrane pressure of 6 bar, three different feed concentrations (3, 6 and 9 kg/m 3 ) and three different Re (13, 38 and 111) had been carried out. The process has been modelled simulating the experimental conditions. The computed results were found to be consistent with the experimental ones. All the experiments show a continuous increase of the polarization layer along the channel, regardless of the crossflow velocity, except near the outlet of the cell due to an edge effect. This increase in the polarization layer is greater at lower Re, although it does not influence very much the permeate flux. In contrast, what substantially affects the permeate flux, much more than Re number, is the feed concentration due to its osmotic pressure.

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Section: Introductionmentioning

confidence: 99%

Visualization and modeling of the polarization layer in crossflow reverse osmosis in a slit-type channel

Salcedo‐Díaz

García-Algado

Garcia‐Rodriguez

et al. 2014

Journal of Membrane Science

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“…Известно, что для обеспечения принципиальной возможности записи подобной структуры на ПЗС− матрицу интервал дискретизации (размер пиксела) должен быть как минимум в 2 раза меньше шага по-лос на интерферограмме [4].…”

Section: теоретическое обоснование голографической методики измеренийunclassified

“…Однако существующие голографические из-мерительные системы не обеспечи-вают временной и пространственной разрешающей способности, необхо-димой для визуализации и измере-ния параметров высокочастотных колебаний сверхмалой амплитуды, возникающих в ПАВ [4].…”

Section: Introductionunclassified

Holographic Measurement of Surface Acoustic Wave Characteristics in Crystals

Gurevich¹,

Gaponov²,

Redkorechev³

et al. 2015

Izv. vysš. učebn. zaved., Mater. èlektron. teh.

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“…In the field of digital holography [14,15] , the reconstruction of the object field, which is done optically by illumination of a hologram, is performed by numerical methods. The reconstruction process is based on the numerical integration of the Fresnel-Kirchhoff integral shown above.…”

Section: -2mentioning

confidence: 99%

3D displays: toward holographic video displays of 3D images

Yeh¹,

Gu²

2013

中国光学快报

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As the flat panel displays (Liquid Crystal Displays, AMOLED, etc.) reach near perfection in their viewing qualities and display areas, it is natural to seek the next level of displays, including 3D displays. There is a strong surge in 3D liquid crystal displays as a result of the successful movie Avatar. Most of these 3D displays involve the employment of special glasses that allow one view perspective for each of the eyes to achieve a depth perception. Such displays are not real 3D displays. In fact, these displays can only provide one viewing perspective for all viewers, regardless of the viewer's position. In addition, a fundamental viewing problem of focusing and accommodation exist that can lead to discomfort and fatigue for many viewers. In this paper, the authors review the current status of stereoscopic 3D displays and their problems. The authors will also discuss the possibility of using flat panels for the display of both phase and intensity of video image information, leading to the ultimate display of 3D holographic video images. Many of the fundamental issues and limitations will be presented and discussed.

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Digital Holography

Cited by 109 publications

References 0 publications

Visualization and modeling of the polarization layer in crossflow reverse osmosis in a slit-type channel

Visualization and modeling of the polarization layer in crossflow reverse osmosis in a slit-type channel

Holographic Measurement of Surface Acoustic Wave Characteristics in Crystals

3D displays: toward holographic video displays of 3D images

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