Polarization experiments in holographic interferometry

Ackermann, Gerhard; Eichler, Jürgen; Dünkel, Lothar; Schneeweiss, Claudia

doi:10.1117/12.706257

Cited by 3 publications

(5 citation statements)

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“…The potential advantage is the possibility of having many layers of information without having to use reflection layers. [17,18] This scheme is part of the "multilayer" approach. This approach can use established data encoding and error correction and may allow a similar optic as today's BDs.…”

Section: Implementing Holographic Data Storagementioning

confidence: 99%

From the Surface to Volume: Concepts for the Next Generation of Optical–Holographic Data‐Storage Materials

et al. 2011

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Optical data storage has had a major impact on daily life since its introduction to the market in 1982. Compact discs (CDs), digital versatile discs (DVDs), and Blu-ray discs (BDs) are universal data-storage formats with the advantage that the reading and writing of the digital data does not require contact and is therefore wear-free. These formats allow convenient and fast data access, high transfer rates, and electricity-free data storage with low overall archiving costs. The driving force for development in this area is the constant need for increased data-storage capacity and transfer rate. The use of holographic principles for optical data storage is an elegant way to increase the storage capacity and the transfer rate, because by this technique the data can be stored in the volume of the storage material and, moreover, it can be optically processed in parallel. This Review describes the fundamental requirements for holographic data-storage materials and compares the general concepts for the materials used. An overview of the performance of current read-write devices shows how far holographic data storage has already been developed.

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Section: Implementing Holographic Data Storagementioning

confidence: 99%

From the Surface to Volume: Concepts for the Next Generation of Optical–Holographic Data‐Storage Materials

et al. 2011

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“…To infer the concentration dependence of the diffusion coefficient for the complete mole fraction range, the refractive index changes are determined simultaneously in both half cells using a separate optical system for each. The applied real-time holographic interferometry [15,16] enables direct and continuous measurement. The arrangement of one of the optical systems together with the diffusion cell is illustrated in figure 5.…”

Section: Optical Systems For Holographic Interferometrymentioning

confidence: 99%

“…The plano-convex lenses (11) and (12) collimate the beams to plane waves with 50 mm diameter. The object wave passes the diffusion cell (16) and interferes with the undisturbed coherent reference wave on the holographic plate (15). The image recording system (b) is used for the registration of the interference patterns.…”

Section: Optical Systems For Holographic Interferometrymentioning

confidence: 99%

“…Then, diffraction waves interfering with each other are generated behind the hologram. The original object wave is reconstructed as the first-order diffraction [15,16]. The superposition of the original and the actual object waves should result in an interference pattern with an even dark intensity, the zero field.…”

Section: Application Of Holographic Interferometrymentioning

confidence: 99%

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A Loschmidt cell combined with holographic interferometry for binary diffusion experiments in gas mixtures including first measurements on the argon–neon system

Buttig

Vogel

Bich

et al. 2011

Meas. Sci. Technol.

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A new variant of the Loschmidt technique has been developed for measuring binary diffusion coefficients in gas mixtures in a temperature range from 10 to 80 °C and for pressures between 0.1 and 1 MPa. The two half cells of the thermostatted diffusion cell have a rectangular cross section and are fixed one upon the other. They can be connected and separated by means of a sliding plate provided with a pneumatically operated seal. The concentration in both half cells is determined simultaneously during the diffusion process using an optical system for holographic interferometry for each. The change in the refractive index results in an interference pattern which is recorded as a function of time. The concentrations of the diffusing components are derived by means of the Lorentz–Lorenz equation. The binary diffusion coefficients are calculated via the integrated ideal diffusion equation for the complete mole fraction range performing only a unique diffusion experiment. The performance of the apparatus is demonstrated on first measurements on the argon–neon system at 293.15 K. Separate refractive index measurements are carried out leading to values for the first refractivity virial coefficient of the pure gases with an estimated uncertainty of ±0.1%. This low uncertainty is required for the aimed uncertainty of ±0.5…1% for the diffusion measurements to determine the concentration and density dependences of the binary diffusion coefficient.

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“…In this embossed holographic format, for commercial purpose, after the first step of transmission hologram recording, it includes several technological steps such as recording of phase relief white light viewable master hologram, silvering, electroforming, embossing, metalizing, coating and cutting/slitting etc. Here the first transmission holograms are usually recorded on silver halide photo plate using He-Ne laser and in the second step of recording of phase relief master hologram, it is carried out by using the photo resist layers and powerful He-Cd laser [10][11][12][13][14][15] . Though various technologies involved for the final embossed 3D hologram for commercial security applications, this paper describes about our efforts, investigations and result obtained by introducing holographic interferometry in the first step of transmission holograms recording for fringe modulation to enhance the security.…”

Section: D Hologram Master Originationmentioning

confidence: 99%