Hülse mit einer sich verjüngenden optischen Faser

An optical-fiber cable (1) has a light-exiting face (1a). The cable-adapting means (2) are provided on this face. The cable-adapting means (2) have a cylindrical outer surface, the diameter of which is gradually tapered down. The light leaving the face of the cable is moved towards an optical receptor (31) and gradually converged by virtue of the tapered cylindrical surface of these means (2) and then emitted. In this manner, the optical loss is minimized. To prevent a leak through the tapered surface, this surface is painted with a low refractive index film (23). Further, a ferrule (3) is used for positioning the cable-adapting means (2) vis-à-vis the cable (1). By virtue of this configuration, when the light is received by an optical receptor (31) having a small surface chip, optical leakage can be minimized.