Inficon Gmbh

D Data Inc.

Los Alamos National Security, LLC

Optabyte, Inc.

Velor Incorporated

Boris Chernobrod

Vladimir Schwartz

Jacob N Malkin

Daniel Wetzig

Eugene Levich

Serguei Magnitski

Werner Grosse Bley

Andrei Tarasishin

Zeev Orbach

Iossif Diskin

Gennady P Berman

Dinh Nguyen

Tatiana Lissovskaia

Zeev Averbuch

Tatlana Lissovakaya

Aridel Tarasishin

Tatiana Lissovskaya

Alan R Bishop

Vacheslav N Gorshkov

Iossif Diskine

Werner Große Bley

The leak detection device comprises a plurality of measuring cells () in whose interior the absorption of a laser beam () is influenced by the presence of tracer gas. All of said measuring cells () are connected to a host unit () via light-conducting fibers (). In the host unit (), a laser () designed for modulation and a photodetector () are arranged. Modulation of the laser radiation is preferably performed by two-tone frequency modulation. This has the effect that the fiber length cannot significantly skew the result of the measurement.

Test device for performing leak detection at a plurality of test sites

A leak detector comprises a cell provided with a tracer gas inlet preferably permeable to a tracer gas. In the cell, the tracer gas is caused to assume an energetically higher metastable state. By means of laser spectroscopy the absorption spectrum of the metastable tracer gas is sampled in an optical measuring section, whereby the presence of tracer gas is detected.

Leak detector with optical tracer gas detection

A membrane selectively permeable to light gases comprises a membrane body formed by a first plate and a second plate. The second plate comprises a thin layer that is selectively gas-permeable. In the region of windows, this layer is exposed. There, support is provided by a porous bottom wall in the first plate or by narrow bores in the second plate. A heating device causes a radiation heating of the windows.

Gas-selective membrane and method of its production

For leak testing, a tracer gas is advanced to the outer wall () of the hollow test object () while the test object () is in an evacuated state. The tracer gas is discharged from a blower device () in the form of soap bubbles (). When contacting the outer wall (), the soap bubbles will burst, thus forming a cloud () of tracer gas immediately on the outer wall (). By the invention, it is made easier to localize the invisible tracer gas in the ambient air. Further, the tracer gas can be used more effectively so that the costs for performing the testing process are reduced.

Method for performing a leak test on a test object

A high-speed (Gbps), free space optical communication system is based on spectral encoding of radiation from a wide band light source, such as a laser. By using partially coherent laser beams in combination with a relatively slow photosensor, scintillations can be suppressed by orders of magnitude for distances of more than 10 km. To suppress the intensity fluctuations due to atmospheric turbulence, a source with partial transverse coherence in combination with slow response time photodetector is used. Information is encoded in the spectral domain of a wideband optical source by modulation of spectral amplitudes. A non-coherent light source with wide spectrum (an LED, for example) may be used for high-speed communication over short (less than about a mile) distances.

System and method that suppresses intensity fluctuations for free space high-speed optical communication

An optical information storage medium has multiple information layers. On each layer, information is stored in the form of an electroluminescent material. The pits are organized into regions called pages. A specific page on a specific layer can be addressed through electrodes integrated into the medium. The medium can be read-only or WORM. For the WORM embodiment, a recordable electroluminescent material is combined with a quencher and a free radical generating compound that, when thermally degraded, generates free radicals to bleach the quencher. To amplify the light from an information layer, a photoconductive layer and an additional electroluminescent layer can be provided.

Electroluminescent multilayer optical information storage medium with integrated readout and composition of matter for use therein

Electroluminescent multilayer optical information storage medium with integrated readout and compositions of matter for use therein

In an optical memory device, an electroluminescent matrix has a plurality of individually electrically addressable electroluminescent cells, each having a stack of memory cells. The electroluminescent cells are addressable by applying a biased voltage through a grid of light-transparent electrodes.

Volumetric electro-optical recording

A reverse bias voltage in combination with selective illumination can selectively write data into optical memory. The writing process can be completed quickly since parallel writing of data may be performed. The writing process generates an avalanche current that is used to change an element. The change can be destruction of the element or may be the alteration of property such as conductance or work function.

Avalanche breakdown memory devices and method of using the same

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Santa Fe, NM, United States of America

Boris Chernobrod