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| Number | Title | Issue Date |
| 8079233 | Burner for manufacturing porous glass base material The present invention provides a burner for manufacturing a porous glass base material that has small-diameter gas discharge ports and that achieves uniform linear velocity at the gas discharge ports, a uniform reaction, and a stable flame, and improved deposition e... | 12/20/2011 |
| 7587914 | Burner for manufacturing a glass optical fibre preform by vapour deposition A method for feeding a flow of gas to a burner for manufacturing an optical fiber preform. The burner has a plurality of coaxial tubes, each two adjacent coaxial tubes defining an annular channel between themselves; an annular gas distribution chamber at one extremi... | 09/15/2009 |
| 7441416 | Method for manufacturing optical fibre preforms Multi-flame burner wherein each flame is separated with respect to the neighboring flame by at least one separating tube made of a heat resistant material, for example, quartz glass or ceramic material. The burner also has a plurality of co-axial pipes, preferably m... | 10/28/2008 |
| 7437893 | Method for producing optical glass This invention provides a method for manufacturing an optical glass in order to prevent the deterioration of the burner used in the synthesis of glass particles that form the optical glass, and to obtain a stable quality optical glass. In this invention, the number ... | 10/21/2008 |
| 7415844 | Device for manufacturing a preform for optical fibres through chemical deposition A device for manufacturing a preform of glass material for optical fibres. A chemical deposition chamber, at least one burner mobile along a direction Z and adapted to deposit a chemical substance on at least an elongated element positioned along an axis Z-Z, at lea... | 08/26/2008 |
| 7383704 | Apparatus for deposition by flame hydrolysis An outside chemical vapor deposition apparatus is disclosed for depositing porous glass-forming material onto a target rod to form a cylindrical body, with substantially higher efficiency than could prior apparatus. The apparatus includes two separate burner arrays,... | 06/10/2008 |
| 7310975 | Method and device for producing a cylindrical body consisting of quartz glass A known method for producing a cylindrical body uses a precipitation assembly (5) consisting of several precipitators (4), to which a parent substance is fed via medium supply lines (9), whereby the precipitation assembly (5) completes a ... | 12/25/2007 |
| 7299659 | Method for manufacturing optical fiber preforms Method and burner for increasing the deposition rate of porous glass deposit in the manufacture of optical preforms, by modifying the cross-sectional shape of the flow of glass particles impacting onto a target preform. In particular, the cross-section of the flow o... | 11/27/2007 |
| 7265070 | Synthetic silica glass optical material having high resistance to optically induced index change Disclosed is a synthetic silica glass optical material having high resistance to optical damage by ultraviolet radiation in the ultraviolet wavelength range, particularly in the wavelength region of less than about 250 nm and particularly, exhibiting a low laser ind... | 09/04/2007 |
| 7213416 | Glass base material producing device A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming... | 05/08/2007 |
| 7165425 | Multi-tube burner and glass preform manufacturing method using the same A multi-tube burner is provided which includes a cylindrical outermost nozzle and at least one cylindrical inner nozzle provided coaxially with the outermost nozzle to form annular jet openings for gases used to manufacture a glass preform. The angle between a cente... | 01/23/2007 |
| 7143608 | Burner for synthesizing glass particles and method for producing porous glass body A concentric multi-tubular burner for synthesizing glass particles having a center port group constituted by a combination of jet ports of raw material gas, combustible gas and oxygen gas, wherein an outer wall of the oxygen gas jet port in the center port group pro... | 12/05/2006 |
| 7082791 | Apparatus for fabricating soot preform for optical fiber An apparatus for fabricating a soot preform for an optical fiber. The soot preform is fabricated by depositing glass particles on a starting rod capable of being rotated and pulled up. The apparatus comprises elements as follows. A reaction chamber is used for depos... | 08/01/2006 |
| 6941773 | Apparatus for manufacturing an optical fiber soot, and method for manufacturing an optical fiber soot using thereof An apparatus for manufacturing an optical fiber soot, which comprises a core partition having an opening portion at core burner side provided on a periphery of a core burner, in a reactor of the apparatus to be used in a conventional VAD method. ... | 09/13/2005 |
| 6920766 | Apparatus for producing synthetic quartz glass A synthetic quartz glass preform is produced by flame hydrolysis with subsequent cooling and is suitable for the application of high-energy DUV radiation in the wave length range under 250 nm. The preform has a core area which contains ≧1150 ppm OH, a strain doubl... | 07/26/2005 |
| 6910352 | Deposition of high fluorine content silica soot The invention includes methods of making a fluorine doped soot particle. One method of the invention includes the steps of (1) delivering a silicon containing precursor to a first opening in a burner face; (2) delivering a source of oxygen to a second opening, where... | 06/28/2005 |
| 6901775 | Method and apparatus for providing a uniform coating thickness along an axial direction within a substrate tube A method and apparatus for providing a uniform coating thickness along an axial direction within an internal portion of a substrate tube is disclosed. A gas delivery unit is configured to coat the internal portion of the substrate tube. The gas delivery unit include... | 06/07/2005 |
| 6837076 | Method of producing oxide soot using a burner with a planar burner face A burner and a method for producing an inorganic soot such as silica comprising a plurality of substantially planar layers having multiple openings therethrough formed by a micromachining process. The openings are in fluid communication with a precursor inlet and a ... | 01/04/2005 |
| 6751987 | Burners for producing boules of fused silica glass Burners (14) are used to make glass bodies (19) from OMCTS. The burners have six concentric regions. Putting certain gases through the regions results in thicker bodies than can be achieved with existing techniques and with improved efficiency. ... | 06/22/2004 |
| 6735981 | High heat capacity burners for producing fused silica boules Burners and methods for producing fused silica members. The burner includes seven gas-emitting regions, including four regions for emitting a mixture of oxygen and combustible gas. ... | 05/18/2004 |
| 6725690 | Burner for synthesizing glass particles and method for producing porous glass body A concentric multi-tubular burner for synthesizing glass particles having a center port group constituted by a combination of jet ports of raw material gas, combustible gas and oxygen gas, wherein an outer wall of the oxygen gas jet port in the center port group pro... | 04/27/2004 |
| 6698249 | Porous glass base material production device and method An object of the present invention is to reduce the adhesion of floating glass particulates to the surface of a soot preform during the manufacture of the soot preform, thereby reducing the voids generated in the transparent glass preform made from the so... | 03/02/2004 |
| 6698248 | Methods and furnaces for fused silica production Methods and apparatus for producing fused silica members having high internal transmission are disclosed. The apparatus and methods are capable of producing fused silica having internal transmission of at least 99.65%/cm at 193 nm.... | 03/02/2004 |
| 6672112 | OVD apparatus including air-regulating structure An apparatus for manufacturing a glass base material, which is a base material of an optical fiber, comprising: a base rod, around and along which said glass base material is formed; a burner that hydrolyzes and accumulates a gas material, which is a base... | 01/06/2004 |
| 6598425 | Method for collecting soot A method and apparatus for manufacturing optical components. A burner generates soot, and a surface area collector collects the soot. The burner is disposed such that the soot collected within the surface area collector is substantially not reheated by su... | 07/29/2003 |
| 6588230 | Sealed, nozzle-mix burners for silica deposition Burners (40) for producing fused silica boules are provided. The burners employ a tube-in-tube (301-306) design with flats (56, 50) on some of the tubes (305, 301) being used to limit the cross-sectional area of certain passages (206, 202) within the burn... | 07/08/2003 |
| 6546759 | Glass base material manufacturing apparatus with super imposed back-and-forth burner movement An apparatus for manufacturing a glass base material, which is a base material of an optical fiber, comprising: a base rod, around and along which said glass base material is formed; a burner that hydrolyzes and accumulates a gas material, which is a base... | 04/15/2003 |
| 6374639 | Silica glass and its manufacturing method A method is provided for manufacturing a silica glass that is substantially free of chlorine. The method includes the step of separately expelling a silicon tetrafluoride gas, a combustion gas, and a combustible gas from a burner made of silica glass, the... | 04/23/2002 |
| 6374642 | Method and apparatus for combustion-enhanced vaporization An apparatus for producing a glass soot includes a first a burner having a droplet-emitting first region, a gas-emitting second region surrounding the first region, and a gas-emitting third region surrounding the second region. The first region emits a gl... | 04/23/2002 |
| 6367288 | Method and apparatus for preventing burner-hole build-up in fused silica processes In furnaces for producing high purity fused silica glass boules, glass particles have a tendency to build-up adjacent the burner hole rim. It was discovered that unburned furnace gases containing silica particles where re-circulated in the furnace close t... | 04/09/2002 |
| 6363746 | Method and apparatus for making multi-component glass soot An apparatus for producing the glass soot used in the formation of optical fiber includes a burner with an internal atomizer. The atomizer includes an outer tube having a nozzle at an end thereof, and an inner tube located within the outer tube and having... | 04/02/2002 |
| 6338259 | Cooling apparatus used in fabrication of optical fiber preform An apparatus and process for cooling a quartz tube used in fabrication of an optical fiber preform by modified chemical vapor deposition. The apparatus has a nozzle ring supplied with a coolant. The nozzle ring has at least two vent sections that are be s... | 01/15/2002 |
| 6334339 | Hooded torch for synthesizing glass particulates A hooded glass particulate synthesizing torch, provided with at least a glass particulate synthesizing torch body having a feedstock gas injection passage formed at the center of its front end, a combustible gas injection passage formed concentrically at ... | 01/01/2002 |
| 6301936 | Apparatus for manufacturing porous glass preform The object of the invention is to provide an apparatus for manufacturing a porous glass preform, which comprises a reaction vessel in which local stress concentration caused by expansion due to heat is prevented, and there is no fear of the occurrence of ... | 10/16/2001 |
| 6260385 | Method and burner for forming silica-containing soot A method and a burner for manufacturing silica-containing soot is disclosed. The method includes providing a liquid silicon-containing feedstock and a gas mixture and ejecting the liquid-gas mixture from an orifice into a combustion site to convert the si... | 07/17/2001 |
| 6196028 | Apparatus for controlling the sag of a preform in an installation The invention relates to apparatus for supporting a preform manufactured in an installation for manufacturing or building up preforms having supporting cores, said installation including at least rotation means having a horizontal axis of rotation and two... | 03/06/2001 |
| 6145344 | Method for the preparation of a porous silica glass preform for optical fibers Proposed is an improvement in the VAD process for the preparation of a porous silica glass preform for double-core optical fibers by using three oxyhydrogen flame burners installed one above the other in a flame hydrolysis chamber in which a porous silica... | 11/14/2000 |
| 6003342 | Apparatus for production of optical fiber preform Disclosed is a process of producing an optical fiber preform having a step of charging a feedstock gas in an oxygen-hydrogen burner via an electrode and hydrolyzing the same in an oxygen-hydrogen flame to produce particulates containing charged glass part... | 12/21/1999 |
| 5958102 | Apparatus and method for making an optical fiber preform using a correction pass A method for making an optical fiber preform comprises depositing fine particles of glass serving as a dad on the surfaces of a rod-shaped core over a given length of the rod-shaped core by use of a plurality of oxyhydrogen flame burner units, detecting a... | 09/28/1999 |
| 5922100 | Precision burners for oxidizing halide-free silicon-containing compounds A precision burner for oxidizing halide-free, silicon-containing compounds, such as, octamethylcyclotetrasiloxane (OMCTS), is provided. The burner includes a subassembly (13) which can be precisely mounted on a burner mounting block (107) through the use ... | 07/13/1999 |
