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US 4,061,484 AGranted
Process for producing gradient fibers
AssigneeSiemens Aktiengesellschaft
InventorsHubert Aulich, Josef Grabmaier
Life of this patent
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Abstract
A process for the production of gradient fibers of glass by depositing layers of glasses having selected indices of refraction and then drawing fibers therefrom. The process is carried out by sequentially introducing a plurality of glass masses to form layers having progressively higher refractive index of refractions. The resulting layers are formed into an unitary body which is drawn into an optic fiber.
Claims7
A process for producing a gradient glass fiber having a changing index of refraction radially comprising the steps of
- A. introducing successively into the rotating, cylindrically-walled heated melting crucible a plurality of glass masses which differ from one another progressively as respects respective indices of refraction thereof, the glass mass introduced initially having the smallest index of refraction of said plurality and the glass mass introduced last having the greatest refractive index of said plurality, so that each individual such glass mass forms a successive cylindrical layer on said cylindrical crucible walls, and
- B. pulling a glass fiber having a radially changing index of refraction from the resulting heated cylindrically layered glass structure.
Dependencies are inferred from the claim text.