Alliedsignal Inc.

Allied Chemical Corporation

Allied Corporation

Other

The United States of America As Represented by the Department of Energy

Karl Storz Endoscopy-america, Inc.

Robert C Morris

Devlin M Gualtieri

Dave Narasimhan

Jerry W Kuper

Philip J Whalen

Timothy C Chin

Joseph J Barrett

Donald F Heller

Janpu Hou

Carl F Cline

Michael L Shand

Norman G Schroeder

Herman Van De Vaart

Ilan Golecki

Donald E Polk

Terrance R Kinney

Bruce H Chai

Stephen M Emo

Paul A Papanestor

Jerzy S Krasinski

Ernest Buehler

Russell S Shelton

John J Flynn

John E Marion, Iii

Hans P Jenssen

John H Moody

Yehuda B Band

Patrick Coronato

Otis G Peterson

Margaret N Long

Devlin M Gaultieri

John C Walling

Karsten Damgaard-Iversen

O'Dell, E Wayne

An energy storage flywheel having a benign failure mode, the rotor of which is constructed of a brittle, high specific strength, isotropic solid.

Isotropic energy storage flywheel rotor

A Ring Laser Gyroscope, constructed on a low thermal expansion, lithium containing, glass-ceramic frame, with a negatively charged trap electrode applied directly to the frame surface near the cathode for the purpose of intercepting mobile positive ions transported under the influence of the anode to cathode electric field during laser operation.

Ring laser gyroscope with ion flux trap electrode

Blades for use in combusion turbine engines are formed from a single crystal aluminum garnet body--desirably a rare earth aluminum garnet body--having an epitaxial surface layer of a second aluminum garnet having a lattice constant larger than that of the body garnet so as to provide a compressive strain, to thereby strengthen the blade.

Single crystal oxide turbine blades

Blades for use in combusion turbine engine are formed from a single crystal garnet body--suitably an aluminum garnet, desirably a rare earth aluminum garnet--having an epitaxial surface layer of a second garnet having a lattice constant larger than that of the body garnet so as a compressive strain, to thereby strengthen the blade.

Reinforcement fibers are formed from a single crystal garnet body--suitably an aluminum garnet, desirably a rare earth aluminum garnet--having an epitaxial surface layer of a second garnet having a lattice constant larger than that of the body garnet so as to provide a compressive strain, to thereby strengthen the fiber.

Epitaxially strengthened single crystal aluminum garnet reinforcement

Porous solid bodies, especially carbon bodies, are densified by chemical vapor deposition by establishing a thermal gradient within the body, thermally decomposing a gaseous precursor so deposit an electrically and thermally conductive deposit (e.g. carbon) within the body, and shifting the thermal gradient toward the lower temperature zone as deposition proceeds, by means of induction heating.

Method of rapidly densifying a porous structure

A sensor for use in an optical temperature detector system having a birefringent element made of a single crystal metal oxide plate. A broad band light spectrum is transmitted through a first linear polarizing element to create a linearly polarized wave. The linearly polarized wave on passing through the single crystal metal oxide plate decomposes into first and second orthogonally polarized waves. Propagation of the linearly polarized wave through the birefringent single crystal metal oxide plate introduces a temperature dependent phase shift between the two waves. Thereafter, a second linear polarizer combines the first and second orthogonally polarized waves to create a modulated light spectrum having a fringe pattern, the fringe pattern being a function of the current temperature experienced by said birefringent element. A fiber optic cable connected to the second linear polarizing element carries the modulated light spectrum to an opto-electronic interface where the fringe pattern is extracted and a computer compatible signal is generated for a CPU to accurately indicate current environmental temperature conditions up to 1000.degree. C. experienced by the single crystal plate crystal in the birefringent element.

Fringe pattern analysis of a birefringent modified spectrum to determine

This invention provides birefringent optical waveguide structures of crystalline aluminum garnet of a high refractive index which are clad with crystalline aluminum garnet of a lower refractive index. Due to predetermined lattice mismatch between garnet substrate and cladding layer, strain is induced which causes a stress with resultant birefringence in the waveguide layer. When linearly polarized light enters such stressed waveguide in certain orientations, the linear polarization will be preserved by the stress-induced birefringence. These birefringent clad waveguides can be in the form of slabs, channels, ribs, or any of the typical optical waveguide structures. They are useful at high temperature.

Birefringent optical waveguides of aluminum garnet

Rotational displacement of the birefringent lasing medium in a lasing cavity containing a polarizing element varies the spectral width of the generated laser light. The combination in a lasing cavity of a birefringent lasing medium, a polarizing element, a tuning element and a birefringent compensator permits output of narrow bandwidth spectrally tuned laser light continuously over the total gain bandwidth of the lasing medium by rotating the lasing medium, tuning to desired wavelength, and adjusting the birefringent compensator to optimize output of laser light.

Broadband tuning and laser line narrowing utilizing birefringent laser

Optical waveguides suitable for use in high temperature environments are constructed of a waveguiding body composed of a first crystalline aluminum garnet, which is clad with an epitaxially deposited layer of a second crystalline aluminum garnet. The second crystalline aluminum garnet has a lower refractive index than the first crystalline aluminum garnet.

Optical waveguides of aluminum garnet

Method and apparatus are provided for laser lithotripsy by subjecting calcified matter in the mammalian body, especially the human body, to two spatially and temporally overlapping pulsed laser light beams in the 300-450 and 600-900 nanometer wavelength range.

Dual frequency laser lithotripter

A simple, compact, and rugged laser comprises a solid transparent housing with two cavities. A laser medium is embedded in one cavity and a pump lamp in the other. By choosing for the housing and lamp envelope materials having thermal expansion coefficient similar to that of the laser medium, high power operation is feasible. An optional reflecting coating on the exterior of the housing enhances efficiency. A filter coating on the lamp envelope eliminates unwanted components of lamp radiation.

Unitary solid-state laser

An epitaxial layer is used to place the surface of a crystal in compression o as to greatly increase the durability of the crystal such as a laser medium crystal.

Epitaxial strengthening of crystals

A simple, compact, and rugged laser comprises a solid transparent housing with two cavities. A laser medium is embedded in one cavity and a pump lamp in the other. By choosing for the housing and lamp envelope materials having thermal expansion coefficient similar to that of the laser medium, high power operation is feasible. An optional reflecting coating on the exterior of the housing enhances efficiency. An optional filter coating on the lamp envelope eliminates unwanted components of lamp radiation.

A single crystal of rare-earth-doped lanthanum beryllate, whose crystal orientation is suitably chosen, provides a laser medium whose index of refraction is substantially independent of temperature. A laser using such a crystal as the laser medium displays little or no thermal lensing, thus permitting high power operation without wavefront distortion.

Growing community of inventors

Ledgewood, NJ, United States of America

Robert C Morris