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AssigneeU.S. Philips Corporation
InventorsAdrianus J. J. Franken, Giok D. Khoe, Gerard Kuyt, Johannes H. F. M. Van Leest, Antonius J. A. Nicia, Cornelis J. T. Potters, Hendricus F. G. Smulders
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The invention relates to a method of and a device for providing an outer surface of an envelope which is concentric to a light-conductive core, around a monomode optical fiber. According to the invention, the eccentricity of the fiber and the envelope may be for example, 0.1 .mu.m for a core diameter of 3 .mu.m. This accuracy is acieved by splitting a light beam, emerging from the end of a fiber which is clamped in an envelope, into two subbeams by means of rotating optical means, each of the beams producing a circular image. By a suitable choice and adjustment of the optical means, the two light beams will form oppositely moving images when the fiber end is displaced with respect to the axis of rotation and observation. When the images are concentric, the fiber end is situated on the axis of rotation. Machining of the envelope by the use of a tool which rotates around the axis of rotation results in an envelope which is concentric to the light-conductive core of the fiber.
A method of providing an envelope on an end of an optical fiber, said envelope having an outer surface which is at least partly concentric with a light-conductive core of the fiber end, said method comprising the steps of:
A device for providing an envelope on an end of an optical fiber, said envelope having an outer surface which is at least partly concentric with a light-conductive core of the fiber end, said device comprising:
Dependencies are inferred from the claim text.