Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7976740 | Fabrication of optically smooth light guide Embodiments related to the fabrication of a light guide are provided. One disclosed embodiment comprises extruding a thermoplastic polymer through a die to form an extrusion, machining the extrusion to one or more fixed dimensions, and maintaining a face of the extr... | 07/12/2011 |
| 7892460 | Enclosed drawing method A system and method for drawing a preform. A draw tower includes a mount configured to suspend a preform. The method includes securing the preform to a mount and enclosing the preform in an enclosure. The enclosure has an external surface and defines an orifice thro... | 02/22/2011 |
| 7412139 | Light transmission A fiber optic cable comprising at least one light transmitter extending longitudinally along the cable and a body encompassing the light transmitter. The body includes an exposed surface having an array of fastener elements extending therefrom. The fastener elements... | 08/12/2008 |
| 7310466 | Photonic crystal waveguides and systems using such waveguides In general, in one aspect, the invention features a waveguide that includes a core extending along a waveguide axis and a confinement region surrounding the core. The confinement region includes a spiral portion and a non-spiral portion, wherein the spiral portion a... | 12/18/2007 |
| 7212723 | Monolithic waveguide arrays A waveguide array is fabricated by providing a photoreactive material and generating an optical intensity pattern corresponding to a geometry of the waveguide array. A relative translation of the photoreactive material is effected through the optical intensity patte... | 05/01/2007 |
| 7200307 | High count telecommunication optical cable with controlled fiber length method and apparatus for manufacturing the same A telecommunication optical cable has a number of optical fibers; at least a microsheath loosely containing the optical fibers, the at least one microsheath loosely containing the optical fibers therein forming at least one corresponding microbundle, wherein the opt... | 04/03/2007 |
| 7192541 | Method and apparatus for solid-stranding a flextube unit A solid-stranding method and apparatus for forming optical cables. Solid-stranding combines buffering and stranding operations, as well as performs the stranding operation while the flextubes are still hot so that they adhere together without additional binders. Opt... | 03/20/2007 |
| 7175411 | Process for the production of a cable and device for performing this process The present invention concerns a process for producting cables, in particular cables for the distribution of electrical energy or cables for telecommunications, more particularly, cables having at least one covering layer comprising a composition of high viscosity. ... | 02/13/2007 |
| 7167622 | Photonic crystal fibers and medical systems including photonic crystal fibers In general, in one aspect, the invention features systems, including a photonic crystal fiber including a core extending along a waveguide axis and a dielectric confinement region surrounding the core, the dielectric confinement region being configured to guide radi... | 01/23/2007 |
| 7155097 | Fabrication of microstructured fibres A preform for a microstructured fibre or a part for a preform for a microstructured fibre. The preform or part has a length in the longitudinal direction and a cross section perpendicular thereto, and includes a rod arranged at the centre of the preform or part, wit... | 12/26/2006 |
| 7135133 | Method and apparatus for manufacturing plastic optical transmission medium The present invention relates to a method and apparatus for manufacturing plastic optical transmission medium. The subject method and apparatus can produce a variety of optical transmission medium, including for example, graded refractive index polymer optical fiber... | 11/14/2006 |
| 7122134 | Optical members, compositions, methods and S-containing compounds for producing them A novel optical member is disclosed. The optical member comprises a region having a distributed refractive index, wherein the region is formed from a composition used for producing an optical member comprising a polymerizable monomer and a compound represented by fo... | 10/17/2006 |
| 7011774 | Composite structural components containing thermotropic liquid crystalline polymer reinforcements for optical fiber cables A process for producing an optical fiber cable composite structural component, such as reinforcing members, buffer tubes, filler rods, jackets, and slotted cores, is disclosed. The composite structural components are produced by co-extruding a thermotropic liquid cr... | 03/14/2006 |
| 6978077 | Plastic optical fiber and method for producing the same A plastic optical fiber and a method for producing the same is disclosed. The plastic optical fiber is formed as a fiber of core-cladding structure. A protective layer or shield layer may be provided on the outer surface of the optical fiber of core-cladding structu... | 12/20/2005 |
| 6908576 | Method of manufacturing plastic optical fiber In a method of manufacturing a plastic optical fiber by heating and drawing either one end portion of a transparent plastic rod, a plastic optical fiber having a cross sectional form approximately similar to the cross sectional form of the transparent plastic rod, t... | 06/21/2005 |
| 6905646 | Methods of producing synthetic resin wire A method of producing a synthetic resin rod (wire), comprising: an extruding step of extruding a synthetic resin rod; a pre-cooling step of spraying a cooling medium on the rod to pre-cool the rod extruded down to ... | 06/14/2005 |
| 6892011 | Method and apparatus for fabrication of plastic fiber optic block materials and large flat panel displays This invention concerns a method and apparatus for manufacturing a sheet and a two-dimensional matrix of plastic optical fibers. The fibers may be of the step-index or graded-index type. Co-extrusion through a specially designed die is used to produce a sheet compos... | 05/10/2005 |
| 6827884 | Method and apparatus for manufacturing an optical fibre cable and cable so manufactured Undesired and unforeseeable shrinkage may occur in a tube of plastic material containing optical fibres following its manufacture, especially during storage when the tube is wound on a reel. As a result, there may be uncontrollable variations of the ratio between le... | 12/07/2004 |
| 6787602 | Method and installation for making an optical fiber A subject matter of the invention is a batchwise process for the manufacture of an optical fiber made of polymers, the core of the fiber being based on methyl methacrylate. This process is carried out in an in-line plant leaktight with respect to the outside ranging... | 09/07/2004 |
| 6776932 | Polymeric optical articles Polymeric optical articles, including gradient index optical preforms and fiber produced therefrom, are described. Methods for producing the optical articles using platicizers and/or dopants in the sheathing of the articles are also described. Gradient index optical... | 08/17/2004 |
| 6634075 | Method and arrangement in connection with secondary coating line The invention relates to a method and an arrangement in connection with a secondary coating line, in which method a fiber, fibers or fiber bundles are unwound from payoff reels (1) and guided to a press (4) by which a secondary sheath is formed around the... | 10/21/2003 |
| 6631233 | Graded index type optical fibers and method of making the same A graded index type optical fiber having a multilayer structure comprising a plurality of concentrically arranged layers formed of (co)polymers selected from the group consisting of two or more homopolymers HP1, HP2, . . . , HPn derived from monomers M1, ... | 10/07/2003 |
| 6576166 | Method of manufacturing a graded-index plastics optical fiber A method and apparatus for manufacturing a graded-index plastics optical fiber of continuously varying index profile, starting from a particular polymer P and a particular compound M1, the method including the steps of: preparing two compositions of diffe... | 06/10/2003 |
| 6533883 | Method of manufacturing optical medium In a method of manufacturing an optical medium, an extended optical conductor containing active substance is formed to a predetermined shape by the use of resin by repeatedly folding or winding the optical conductor. A laser light beam or an amplified lig... | 03/18/2003 |
| 6527986 | Extrusion process for fabricating plastic optical fiber An improved process for extruding plastic optical fiber without the need to prepare a preform is provided. Specifically, it was discovered that conventional extrusion techniques, e.g., screw extruders, tended to introduce an undesirable amount of particul... | 03/04/2003 |
| 6500365 | Process for the manufacture of an optical core for a telecommunications cable Optical core for a telecommunications cable comprising at least one support consisting of a central reinforcing member and a first coating layer of a thermoplastic polymer applied around the central member, a plurality of optical fibres arranged around th... | 12/31/2002 |
| 6471892 | Method of producing tape type optical fiber core wire In a method of making a ribbon type coated optical fiber 3 comprising the step of inserting a plurality of optical fibers 1 flatly arranged parallel to each other through a die orifice 11a so as to collectively coat the optical fibers with a coating resin... | 10/29/2002 |
| 6466720 | Optical fibre cable manufacture In a method of manufacturing an optical fiber cable comprising optical fiber units 12 disposed within an extruded sheath 14 with water absorbent powder 16 being provided between the optical fiber unit or units and the sheath, the fiber units pass through ... | 10/15/2002 |
| 6447700 | Resin composition for optical fiber loose tubes, optical fiber loose tube and production process thereof A resin composition for optical fiber loose tubes contains (A) 100 parts by weight of polybutylene terephthalate having a terminal carboxyl group concentration of 10 eq/ton or less and an intrinsic viscosity of 1.0 to 1.2. and (B) 0.005 to 0.1 part by wei... | 09/10/2002 |
| 6428893 | Graded index plastics optical fiber and a method of continuously fabricating a graded index plastics optical fiber A method of continuous application of a graded index plastics optical fiber in which the refractive index is highest in the center and decreases progressively towards the periphery, said fiber having a plurality of layers of resin deposited concentrically... | 08/06/2002 |
| 6376010 | Germanium doped silica forming feedstock and method The present invention is directed to a silica forming feedstock and a method of making optical waveguides and optical waveguide preforms. The feedstock for use in the manufacturing of germanium doped silica glass products includes a siloxane and a germani... | 04/23/2002 |
| 6365072 | Polymer optical fibers and process for manufacturing thereof The present invention describes improved methods of making polymer optical fiber cable, graded index optical fibers and step index optical fibers. The present invention may also include improved polymer optical fibers that incorporate optional quinine and... | 04/02/2002 |
| 6327767 | Method and apparatus for the continuous manufacture of fiber-optic cable The present invention relates to a method and apparatus for continuous manufacture of a fiber-optic cable. According to the method, single optical fibers of certain length are formed into a fiber-optic cable enclosed by a secondary sheath. Further, a cert... | 12/11/2001 |
| 6307992 | Graded index type optical fibers and method of making the same A graded index type optical fiber having a multilayer structure comprising a plurality of concentrically arranged layers formed of (co)polymers selected from the group consisting of two or more homopolymers HP1, HP2, . . . , HPn derived from monomers M1, ... | 10/23/2001 |
| 6272275 | Print-molding for process for planar waveguides A method for fabricating optical devices for transmission and/or manipulation of light includes steps of providing a substrate which defines a reference plane for positioning cladding material and core material, fixing rigid spacers to an upper surface of... | 08/07/2001 |
| 6267915 | Production method for objects with radially-varying properties The present invention is a continuous process of producing an object with radially-varying material properties. These objects can be cylindrical forms made from polymeric materials. This process requires a novel device. The device can be used to produce h... | 07/31/2001 |
| 6254808 | Process for fabricating plastic optical fiber A continuous extrusion process is provided capable of producing graded index plastic optical fiber at commercially useful speeds, e.g., at least 1 m/sec for 250 μm outer diameter fiber. Moreover, it is possible to predict the refractive index profile of ... | 07/03/2001 |
| 6241920 | Electrically optimized hybrid "last mile" telecommunications cable system A cable system is provided which can accommodate electrical and optical cabling. The conductors of the system employ a layer which is impedance-matched to space, decreasing their cross-section to electromagnetic interference. The conductors of the system ... | 06/05/2001 |
| 6190583 | Apparatus and method for making slotted rod for optical cable The present invention relates to an apparatus and method for making a slotted rod for an optical cable, which improves manufacturing efficiency, while alleviating the load applied to the apparatus. In the present invention, a rotatable die for forming a s... | 02/20/2001 |
| 6185353 | Graded index type optical fibers and method of making the same A graded index type optical fiber having a multilayer structure comprising a plurality of concentrically arranged layers formed of (co)polymers selected from the group consisting of two or more homopolymers HP1, HP2, . . . , HPn derived from monomers M1, ... | 02/06/2001 |
