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5711903 Method of manufacturing a porous preform for an optical fiber  
The present invention provides a method of manufacturing a porous preform for an optical fiber, including the steps of removing impure particles from silica powder while being stirred in an...
5702654 Method of making thermal shock resistant sapphire for IR windows and domes  
Single crystal sapphire is conventionally employed for mid-wave IR windows and domes exposed to high aerodynamic heating environments. Single crystal sapphire, however, suffers a loss of...
5700404 Process and device for casting a large-area crystalline salt body  
A process and device for producing an optically pure polycrystalline salt body by melting a starting material for the salt and then introducing the melted material into a casting mould having a...
5685358 Method for melt-molding Ge, Si, or Ge-Si alloy  
Ge, Si or a Ge-Si alloy are melt-molded to form, for example an optical lens, by heating Ge, Si or a Ge-Si alloy to at least its melting point, and heating a molding die to a temperature above that...
5650366 Ceramic mirrors  
A ceramic mirror having a surface flatness of no more than 1 μm and/or a centerline average height of no more than 1 nm as measured by the laser interference method, is made from a titanium oxide ...
5643505 Method for making low cost infrared windows  
Low cost broadband infrared windows are fabricated using a near net shape process which greatly reduces the cost of machining and grinding window materials. The fabrication of zinc sulfide (ZnS) IR...
5627116 Method of making a translucent polycrystalline alumina  
A sintered, translucent ceramic article comprises alpha alumina and up to 0.050 wgt. percent magnesia and between 0.001 to 0.100 wgt. percent lutetium oxide. In a preferred embodiment, the lutetium...
5618474 Method of forming curved surfaces by etching and thermal processing  
A smooth contoured structure is formed from a planar surface by etching mesas of equal height into the surface and heat treating the structure to mass transport material above the desired contour...
5615291 Capillary for optical fiber connectors and method of manufacturing the same  
A capillary for an optical fiber connector which is low in machining cost and a process for producing the same is provided. The capillary for an optical fiber connector of the present invention...
5609800 Process for producing high-density and high-strength carbon artifacts showing a fine mosaic texture of optical anisotropy  
Self-adhesive carbonaceous grains for use in the manufacture of high-density and high-strength carbon artifacts containing 0.5-1.5 wt % of a quinoline-soluble but pyridine-insoluble component and...
5597518 Method for producing self supporting flat video display  
A face plate for a cathode ray tube display is produced by a method in which small holes are formed through a sheet of unfired ceramic tape. The holes are arranged in a desired pattern for the...
5587124 Method of making synthetic diamond film with reduced bowing  
A method for depositing synthetic diamond includes the following steps: (a) providing a deposition chamber; (b) providing a deposition surface in the deposition chamber, the deposition surface...
5575959 Process for making low cost infrared windows  
Low cost broadband infrared windows are fabricated using a near net shape process which greatly reduces the cost of machining and grinding window materials. The fabrication of zinc sulfide (ZnS) IR...
5505804 Method of producing a condenser lens substrate  
In a method of producing a condenser lens substrate, after a first clear substrate and a second clear substrate where a micro-lens having a spherical surface or a lenticular lens is formed are...
5500157 Method of shaping polycrystalline diamond  
A technique that involves selective removal of material from a surface of a polycrystalline diamond (polyD) film such that a non-planar surface results. Exemplarily the technique is used to form...
5492872 Ceramic mirrors and method of manufacturing same  
A ceramic mirror having a maximum surface flatness of 1 μm and/or a maximum centerline average height of 1 nm as measured by the laser interference method, and a method of manufacturing a ceramic ...
5436764 Die for forming a micro-optical element, manufacturing method therefor, micro-optical element and manufacturing method therefor  
A die which can press-mold an accurate glass microoptical element such as a grating repetitively can be manufactured easily by adhering a thin film, having an inverse shape of the master of a...
5342022 Method of making infrared crystalline fiber  
A method of making silver halide fibers involves reducing turbulence and friction during extrusion by moving an extrusion die in a direction opposite from flowing fiber and against a stationary...
5314520 Method for manufacturing optical fiber preform  
A method for manufacturing a preform having steps of obtaining a plastic material by kneading silica powder, a binder, water, and a surfactant, and obtaining a porous preform by extrusion-molding...
5308575 Sintered dense laser block  
A sintered dense laser block constructed of ceramic metal composition manufactured through sintering, conventional machining and electro discharge machining. A ceramic metal powder and binder are...
5244849 Method for producing transparent polycrystalline body with high ultraviolet transmittance  
A method for producing a transparent polycrystalline magnesia-alumina spinel body having high ultraviolet transmissivity and high strength and hardness characteristics is provided. A closed...
5242298 Shaped bodies of transparent, polycrystalline alumina  
Shaped bodies of transparent, polycrystalline alumina are produced in a green body is formed in a first step using pure, fine-grained alumina wherein, in the given circumstances, the green body is...
5240670 Method of improving the mechanical properties of semiconductor materials  
Mechanically toughened GaAs and other group III-V and group II-VI materials by hot-forging the GaAs and other materials to obtain the toughening or increase in mechanical strength. The material to...
5221501 Method of producing a smooth plate of diamond  
An improved method of producing transparent diamond laminates employs a substrate which is removed once a second layer is deposited over the diamond coating, thereby exposing a smooth diamond...
5205967 Method of forming retardation plate utilizing deformed zinc selenide  
Zinc selenide is a transparent material which is commonly used with CO2 laser optics. This material can be converted to a birefringent form by deforming the zinc selenide at an elevated...
5201977 Process for producing structures from synthetic single-crystal pieces  
A process for producing structures from synthetic single-crystal pieces having identical major component and crystal systems by chemically bonding to produce integration and simulation. The process...
5182052 Method of manufacturing tubes and device for carrying out the method  
Method of manufacturing tubes in which a mixture of powdered tube material and a liquid binder is introduced into a tubular mold with a geometry corresponding to the geometry of the tube to be...
5152940 Method of producing a light-transmitting spinel sintered body  
A polycrystalline spinel sintered body is provided herein which is superior in light transmission, such that it can be used in an infrared light-transmitting window at a thickness of 2 mm or more....
5126081 Polycrystalline zinc sulfide and zinc selenide articles having improved optical quality  
Articles of polycrystalline zinc sulfide and zinc selenide achieve substantially improved optical quality by a treatment of heat and isostatic pressure by means of an inert working fluid. The...
5071596 Fabrication of lightweight ceramic mirrors by means of a chemical vapor deposition process  
A process to fabricate lightweigth ceramic mirrors, and in particular, silicon/silicon carbide mirrors, involves three chemical vapor deposition steps: one to produce the mirror faceplate, the...
5001093 Transparent polycrystalline body with high ultraviolet transmittance  
A transparent polycrystalline body having high ultraviolet transmissivity is provided. The body is preferably a sintered magnesia-alumina spinel body having a transmittance of at least 85 percent...
4999145 Method of forming hybrid arc tubes  
Disclosed is a method for forming alumina arc tubes of complex shapes. The method comprises molding alumina powders with different shrinkage rates into a green body. The green body is prefired to...
4983555 Application of transparent polycrystalline body with high ultraviolet transmittance  
A transparent polycrystalline body having high ultraviolet transmissivity is provided. The body is preferably a sintered magnesia-alumina spinel body having a transmittance of at least 85 percent...
4981503 High-hardness silica glass and method of producing the same  
High-hardness silica glass having transparency substantially on the same level as silica glass and a Vickers hardness of 12-20 GPa is produced by covering silica glass with powder and treating the...
4968459 Method for the production of transparent, polycrystalline alumina with a yellowish color tone  
A method for the production of shaped bodies of transparent polycrystalline alumina having a yellowish color tone. A green body is formed using pure, fine-grained alumina. The auxiliary agents are...
4948538 Method of making translucent alumina articles  
A method of making a translucent alumina article is described. The method comprises the following steps: Step 1 - An alumina powder and a sintering aid are mixed in a liquid for a period sufficient...
4930731 Dome and window for missiles and launch tubes with high ultraviolet transmittance  
A dome and window for missiles and launch tubes is provided having high ultraviolet transmittance and high strength properties. The domes and windows have, in their uncoated state, and with a...
4923420 Method of manufacturing ceramic translucent material  
A powder mixture of yttrium and aluminum sulfates is prepared and heated in a oxidizing atmosphere. Silicon and/or magnesium compounds are added during the powder mixture preparation, or after it...
4891053 Method of manufacturing biconvex lens elements and element formed thereby  
A method of manufacturing biconvex lens elements (21) comprising a biconvex glass lens (23) and a holder (1) consisting of two cylindrical rings (5,7), which are telescopically slidable with...
4867774 Method of producing an elongated glass body, particularly a preform for optical waveguides  
A method is described of producing an elongated glass body, particularly a preform for SiO2 -base optical waveguides, in which starting glass powder material is shaped to a porous body and the...
4857249 Fabrication of rods of uniform high density from powders of refractory materials  
Cylindrical rods of titanium carbide or other refractory material with uniform, high density are prepared by hot pressing plates from powders of the material, with a uniaxial pressing pressure...
4799601 Translucent alumina ceramic tube and a process for making same  
The disclosed process includes making a slip or slurry by mixing alumina powder, water, a deflocculant and a magnesium compound, casting the slip or slurry by drain casting and thereafter firing or...
4797238 Rapid-sintering of alumina  
An improved process for producing a translucent polycrystalline alumina body comprising rapid-sintering a prefired compacted green body of alumina of predetermined shape is disclosed. The green...
4776868 Lenses and lens arrays  
This invention relates to a method for preparing a lens or a lens array and apparatus for carrying out the method. The method comprises directing, in line of sight in a vacuum, the vapor of a...
4762655 Method of sintering translucent alumina  
An improved process for producing a translucent polycrystalline alumina body comprising sintering a prefired compacted green body of alumina of predetermined shape is disclosed. The green body of...
H000459 Synthesis of cadmium sulfide using the spontaneous reaction of dialkylcadmium and hydrogen sulfide  
Cadmium sulfide is formed successfully from the reactants hydrogen sulfide md the representative dialkylcadmium, dimethylcadmium, spontaneously when mixed in the gas phase. Reactions are monitored...
4720362 Transparent aluminum oxynitride and method of manufacture  
An article of manufacture is provided comprising a polycrystalline cubic aluminum oxynitride having a density of at least 98% of theoretical density, and being transparent to electromagnetic...
4686070 Method of producing aluminum oxynitride having improved optical characteristics  
A method of preparing substantially homogeneous aluminum oxynitride powder is provided comprising the steps of reacting gamma aluminum oxide with carbon in the presence of nitrogen, and breaking...
4661136 Process of fabricating an elongated glass body particularly a preform for optical waveguides  
For fabricating porous bodies from a glass starting material, particularly in connection with the fabrication of an optical waveguide preform, it is proposed to fill powdery glass starting material...
4584151 Method of producing a polycrystalline transparent spinel sintered body  
The disclosed polycrystalline transparent sintered body contains Al2 O3 and MgO at a molar ratio of (0.54:0.46) to (0.58:0.42) and has in-line transmittance of more than 77% for 1 mm thickness at a...
Matches 51 - 100 out of 150 < 1 2 3 >