Device for continuously twisting an optical fiber

Abstract

A device for continuously twisting an optical fiber, which can add a sufficient twist to an optical fiber, is provided. Reciprocating rollers reciprocate so that the moving direction would be opposite each other along a center axis of rotation. The optical fiber passes through a gap between the reciprocating rollers and runs in contact with the outer circumferential surface of respective reciprocating rollers in order. Reciprocation of the reciprocating rollers adds a twist to the optical fiber. When φ is a contacting angle between the optical fiber and the reciprocating rollers, F is maximum static friction of the optical fiber against the outer circumferential surface of the reciprocating rollers, and T is tension of the optical fiber, the coefficient of friction μ between the optical fiber and the outer circumferential surface of the reciprocating rollers is lead from an operational formula of μ=(1/φ)·ln(F/T). This coefficient of friction is set at a value in a range from not less than 0.6 to not more than 0.9.

Dependencies are inferred from the claim text.