JPS57125908A - Production of optical fiber bundle - Google Patents

Abstract

PURPOSE:To provide high resolution with accurate configuration by forming a coating layer thicker than the outside diameter of an optical fiber on said fiber, aligning plural pieces of such coated optical fibers, and forming these into one body while pressurizing the parts near the end parts in the direction intersecting orthogonally with the long axis of the fibers and while holding the coating layers partly removed. CONSTITUTION:A coating layer 2 thicker than the outside diameter of an optical fiber made of quartz glass is provided with a synthetic resin or metal on the outside circumference of an optical fiber 1 consisting of a core 1a for said fiber and a low refractive index glass layer (clad) on the outside circumference thereof. Plural pieces of such coated optical fibers are aligned, and while the parts near the end parts thereof are pressurized in the direction intersecting orthogonally with the long axis direction of the fibers, the layers 2 are dissolved off. In the case of the synthetic resin layers 2, they are removed with a solvent for the same and in the case of the metallic layers 2, they are removed with an aq. soln. of acid or the like. Next, the layers 2 left without dissolution are heated to soften, whereby the end parts formed into one body are obtained. In this way, the bundle arranged accurately with a large number of the optical fibers in both end parts (a), (b) and suited for image transmission requiring high resolution and high fidelity is obtained.