Concept

History of sound recording

Related publications (81)

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Localized holographic recording in doubly doped lithium niobate

Demetri Psaltis

Persistent holograms are recorded locally with red light in a LiNbO3 crystal doped with Mg and Fe. Selective erasure is realized by use of a focused UV sensitizing light. We demonstrate the recording of 50 localized images as well as selective erasure in a ...

2000

Localized holographic recording in doubly doped lithium niobate

Demetri Psaltis

In:holographic data storage, pages of information are overlapped in the volume of the recording medium. Due to destructive read-out of holograms in photorefractive crystals such as LiNbO3:Fe, holograms are recorded with an exposure schedule in order-to equ ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2000

Parallel computation of radio listening rates

Roger Hersch, Monica Marcela Gomez Leon, Marc Mazzariol

Obtaining the listening rates of radio stations in a function of time is an important instrument for determining the impact of publicity. In order to significantly improve the determination of radio listening rates, special watches have been developed whic ...

SPIE-Int. Soc. Opt. Eng2000

A Novel Digital Image Processing System for the Transient Liquid Crystal Technique applied for Heat Transfer and Film Cooling Measurements

Albin Bölcs, Gregory Vogel

This paper is dedicated to the transient liquid crystal technique measurements for multiple view access by using a novel digital recording and image processing system. The transient liquid crystal technique is widely used for heat transfer investigations i ...

2000

Non-volatile hologrphic storage in doubly doped lithium niobate crystals

Demetri Psaltis

Photorefractive materials are being widely investigated for applications in holographic data storage. Inhomogenous illumination of these materials with an optical interference pattern redistributes charge, builds up internal electric fields and so changes ...

1998

Microelectrode arrays for electrophysiological monitoring of hippocampal organotypic slice cultures

Nico de Rooij

A three-dimensional platinum (Pt) microelectrode array embedded on a micromachined silicon (S) substrate (porosity of 13%, via hole diameter of 40 μm) has been developed. Electrodes are 35-μm wide and 20-μm high, spaced 200 μm apart and arranged in an elli ...

1997

High-density recording in photopolymer-based holographic three-dimensional disks

Demetri Psaltis

The performance specifications of a holographic three-dimensional disk system are experimentally characterized. A surface density of 10 bits/mu m(2) is experimentally demonstrated with a 100-mu m-thick photopolymer as the recording medium. (C) 1996 Optical ...

1996

Holographic 3-D Disks

Demetri Psaltis

The performance characteristics of an experimental holographic 3-D disk system are described. A surface density of 10 bits/mu(2) is experimentally demonstrated using a 100 mu m thick photopolymer as the recording medium. ...

1995

Holographic Storage Using Shift Multiplexing

Demetri Psaltis

We demonstrate theoretically and experimentally a new multiplexing method for volume holographic storage using a single reference beam that is composed of multiple plane waves or is a spherical wave. We multiplex the holograms by shifting the recording mat ...

1995

Microendoscopic holography with flexible fiber bundle: experimental approach

Christian Depeursinge

An `in situ' holographic technique, based on the use of a flexible miniaturized endoscope (diameter less than 1 mm) has been developed for medical applications. The holographic process provides quantitative information on the 3-D geometry of the observed s ...

SPIE1993