Graded refractive index fibers and rods

Details Graded refractive index fibers and rods Graded refractive index fibers and rods

C - Chemistry, Metallurgy

03

B

49/8

C03B 37/025 (2006.01) C03B 23/047 (2006.01) C03B 23/207 (2006.01) C03B 37/012 (2006.01) C03B 37/027 (2006.01) C03B 37/15 (2006.01) C03C 21/00 (2006.01) G02B 6/028 (2006.01)

Patent

CA 1144373

AO-3423 BWP:gg GRADED REFRACTIVE INDEX FIBERS AND RODS ABSTRACT OF THE DISCLOSURE Gradient refractive index fibers or rods are formed of leachable glass clad glass core preforms drawn to a desired diametral size, bundled together, fused under high compressing forces and rapidly interdiffused at a temperature above their deformation point. Cooling, annealing and separation of the fibers or rods by leaching provides the end product devices which may be cut into lengths required for the lens power desired and end polished. The refractive index gradient is produced by interdiffusion of Tl+ and K+ ions between core and cladding glasses which are selected to contain substantial proportions of thallium oxide and potassium oxide respectively.

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