Matches 551 - 600 out of 714 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
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4441788 Optical wave guide with fluorine-doped core  
An optical waveguide is disclosed which exhibits only slight attenuation over both the visible and near infrared range. The waveguide comprises an optical fiber whose core is made up of a...
4440470 Optical transmission system coupling a semiconductor laser diode to a multimode optical fiber  
Optical transmission system comprising a laser diode which is coupled to a transmission fiber via a coupling path. The coupling path includes a monomode fiber or the series arrangement of a...
4439007 Low dispersion single mode fiber  
A low-loss single mode fiber with low total dispersion within the wavelength range 1.25-1.385 μm and low added cabling loss is disclosed. The fiber has relatively high Δ to assure low cabling...
4439008 Optical fiber of the graded index type and method of producing same  
An optical fiber of the graded index type consisting of a glass having predominantly the composition 60-70 mole % SiO 2 , 15-30 mole % alkali metal oxides, and 10 to 15 mole % MgO in combination...
4435039 Method and apparatus for improving image quality of a reduction/enlargement gradient index lens array  
A reduction/enlargement gradient index lens array is modified to improve image quality and exposure at an imaging plane. In one embodiment, a masking element is placed in the optical path so as to...
4428646 Optical fibers having crystalline material and method of making same  
An optical fiber with a graded index crystalline core (2,3) is made by filling a tube (1) with a mixture of two salts for which the one with the higher melting point has the lower refractive index....
4423925 Graded optical waveguides  
A process for preparing a glass rod having a graded refractive index for use as the start rod in the production of optical waveguides is disclosed. The process comprises depositing and sintering...
4413882 Low viscosity core glass optical fiber  
Solid glass articles are made by the flame hydrolysis technique. A thin stratum of low viscosity glass soot is applied to the surface of a mandrel. First and second coatings of glass soot are...
4412722 Single mode fiber with graded index of refraction  
This invention involves optical fiber which supports essentially only a single guided mode, perhaps degenerate, at the transmission wavelength, usually between 0.6 and 1.7 microns. The index of...
4406517 Optical waveguide having optimal index profile for multicomponent nonlinear glass  
A gradient index optical waveguide has an optimal index profile even though the relationship between concentration and refractive index is not linear. This is accomplished by varying the...
4406518 Single-mode-transmission optical fiber and a method of manufacturing the same  
A single-mode-transmission optical fiber comprises a core of a radius a having an arbitrary (non constant) refractive index distribution n(r) in the radial direction r, the index distribution being...
4405207 Method of assembling a gradient index lens array having reduction properties  
A method of assembling a plurality of gradient index fibers into a lens array capable of transmitting a reduced or enlarged image is provided. The fibers, in either one or multiple row...
4402017 Optical scanning system utilizing light-emitting diodes  
A compact optical scanning system is provided to scan the information content of a document and generate electrical signals representative of the information content thereof. A light emitting...
4395108 Color balanced scratch suppressing projection apparatus for color transparencies  
A color balanced scratch suppressing projection apparatus for color transparencies includes an objective lens having a rectangular aperture and defining first and second conjugate planes. An...
4394083 Imaging system for a multi-magnification copier utilizing gradient index lens array  
The invention relates to an imaging system for a multi-magnification copier which employs a plurality of gradient index lens arrays to provide a 1× as well as a magnification capability. The...
4373780 Image transmitting system utilizing a gradient index lens  
A gradient index lens array is formed by assembling a plurality of gradient index fibers into a single row. The fiber parameters and fiber-to-fiber spacing are optimized to provide required...
4368946 Information recording method and apparatus  
An information recording method and apparatus capable of reducing the access time of a recording medium disc at the time of each reading are disclosed. In photoelectric conversion of information...
4360250 Optical waveguides  
An optical waveguide has a silica cladding and a phosphosilicate core. Additional components may be added to improve the match of physical properties between core and cladding. The waveguide is...
4359267 Method of assembling a gradient index lens array  
A plurality of gradient index fibers are assembled into a lens array by first coating each fiber with a light absorbent medium to a desired thickness and then pressing the coated fibers into a...
4358181 Gradient index optical waveguide and method of making  
In the method of making a preform for a high numerical aperture gradient index optical waveguide, the concentration of two dopant constituents is changed during fabrication. Concentration of the...
4345833 Lens array  
An array of gradient refractive index lenses designed to produce an erect image of an extended object. The lenses are supported in a matrix of light-absorbing cladding glass for stray light control.
4344670 Optical waveguide soot preform with reduced inner layer stress and method of making  
A process for making a tubular optical waveguide preform for a high-numerical-aperture optical waveguide which comprises an inner compression layer for enhanced preform strength, and a soot preform...
4339174 High bandwidth optical waveguide  
An optical waveguide filament comprising a cladding layer, a core and a barrier layer disposed between the core and cladding. The barrier layer comprises silica doped with B 2 O 3 , P 2 O 5 and...
4339173 Optical waveguide containing P.sub.2 O.sub.5 and GeO.sub.2  
An optical waveguide having a cladding of high purity glass and a core of high purity glass doped with an amount of P 2 O 5 and GeO 2 to increase the refractive index thereof to a predetermined...
4331380 Gradient index lens array having reduction properties  
A gradient index lens array is provided with reduction and enlargement capabilities. Gradient index fibers are arranged in single row or double row (bundled) configuration with fibers increasingly...
4314762 Focused, single strand, optical fiber rotational alignment image-sensing and comparing system  
This system permits the detection of rotational mis-alignment (i.e., twist) of two initially aligned, but separated, members. The two aligned members are linked by a single strand of focused...
4298366 Graded start rods for the production of optical waveguides  
A process for preparing a glass rod having a graded refractive index for use as the start rod in the production of optical waveguides is disclosed. The process comprises depositing and sintering...
4294514 Light-wave guides and method of producing same  
A light-wave guide fiber is pulled from a uniform fiber-yielding material and the peripheral surface areas (cladding) of such fiber are enriched with a gas soluble in the fiber material at...
4293188 Fiber optic small displacement sensor  
An opto-electronic transducer is provided for converting small displacements into optical intensity or phase variations which may then be converted into varying electric currents. A first optical...
4281893 Super wide band light transmitting system  
There is inserted between a light source and an input of an optical fiber a mode filter which changes the phase of light to be propagated continuously or discontinuously so as to convert guided...
4277270 Method of manufacture of optical fiber  
A process is disclosed for manufacturing an optical fiber comprising a silica cladding and multi-component glass core wherein a tube made of the cladding material serves as a crucible in which the...
4277271 Method of manufacturing graded index optical fibers  
A process is disclosed for making an optical fiber having a graded index glass core enveloped by a cladding material. The ingredients from which the core glass is to be formed are dropped into a...
4275951 Optical fibres and glasses  
A range of alkali metal borosilicate glass compositions modified by the addition of alkaline earth metal oxides has been found to be especially suitable for the production of graded index optical...
4274854 Polarization-preserving optical fiber  
A method of making a polarization-preserving optical fiber is disclosed having a first step of fabricating a substrate tube to have a wall of nonuniform thickness, the nonuniformity in thickness...
RE30635 Method of producing internally coated glass tubes for the drawing of fibre optic light conductors  
In the reactive deposition of the core material from a gas which is passed through the tube onto the inner wall of the tube by means of a plasma zone, while a relative motion is effected in the...
4265515 Optical fiber waveguide with effective refractive index profile  
An effective graded index profile optical fiber waveguide comprises alternating regions of high and low indexes of refraction of controlled thickness. The effective refractive index of the fiber...
4264130 Self-focusing fiber array  
A self-focusing fiber array comprises three rows of self-focusing fibers, which are most closely packed and each of the self-focusing fibers substantially satisfies an equation of ##EQU1## where n...
4260221 Multimode fiber with z-dependent index profile  
Increased mode dispersion in graded-index, multimode optical fibers due to defects in the index profile can be significantly reduced if the average defect is caused to vanish over the length of the...
4258978 Image reversing array utilizing gradient refractive index elements  
An array of optical elements having imaging properties in one meridian and light-containment properties in another meridian for imaging a slit aperture in such a way that inversion of the image...
4257671 Fixed optical attenuator for light rays guided by optical fibres  
The present invention relates to the optical fibre technology and more particularly to fixed optical attenuators for insertion in an optical fibre transmission path. The optical attenuator includes...
4252403 Coupler for a graded index fiber  
A concentric core fiber having a low numerical aperture has an end face aligned with the end face of a graded index fiber having a high numerical aperture. The inner core of the concentric core...
4248614 Method for drawing high-bandwidth optical waveguides  
In a method for directly drawing a glass optical waveguide or waveguide blank from two or more reservoirs of molten glass wherein a relatively high refractive index glass core member is clad with a...
4243299 Optical fibers for communication transmission having high stability to nuclear radiation  
An optical fiber comprising a light-conducting core and a borosilicate glass optical insulation cladding thereon is stabilized against the effects of nuclear radiation by incorporating in the core...
4242118 Optical fiber manufacture  
A method for making an optical fiber solid rod preform wherein a vapor reaction deposit process is used to form a localized deposit on an end face of a rod or disc by relative movement in which the...
4242117 Method of producing optical fibers for telecommunications  
When producing a glass fiber, having a graded refractive index profile, by means of the double crucible method, the initial materials being core and cladding glass compositions having mutually...
4236930 Optical waveguide and method and compositions for producing same  
The present invention relates to a glass composition for forming glass articles suitable for forming or being converted to articles or devices for use in the guided transmission of light, for both...
4233045 Apparatus and method for making optical filament preform  
A glass optical waveguide filament preform is prepared by chemical reaction of vapor ingredients within a glass bait tube. A reactant feed tube extends into one end of the bait tube and terminates...
4232938 Telecommunication systems using optical waveguides  
A method for transmitting light signals through optical waveguides is disclosed. The method comprises passing light emitted from a source of light, such as a laser, through a plurality of...
4231775 Method of making ommateal lenses and plates  
Columnar lens elements of a crossed multi-ocular array are each formed of a rectangular preform of core glass containing a modifying oxide which is clad on each of two of its opposite sides with a...
4230396 High bandwidth optical waveguides and method of fabrication  
A method of forming a preform or blank for a high bandwidth gradient index optical filament, the preform itself and the resulting optical filament is disclosed. The preform which ultimately forms...
Matches 551 - 600 out of 714 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >