The utility model discloses a lens for
optical fiber three-core observation, which relates to the technical field of optical fibers, and comprises an observation mirror body, a shading cylinder, an illumination mechanism and a positioning mechanism, the observation mirror body is provided with a focalizer and a lens group, and the lens group is provided with a lens. The shading cylinder is fixed at the
tail end of the observation mirror body; the positioning mechanism is arranged at the
tail end of the shading cylinder and is used for positioning an
optical fiber to be observed; the illumination mechanism comprises an illumination part arranged in the shading cylinder, the illumination part is movably connected in the shading cylinder and used for illuminating the end face of the
optical fiber, the illumination lamp tube generates light to illuminate the observation end face of the optical
fiber, illumination light is evenly gathered on the end face of the optical
fiber through the light gathering lens face, the illumination part can move left and right, and the illumination part can move left and right to illuminate the end face of the optical
fiber. The illumination can be accurately irradiated on the end face of the optical fiber, the situation of insufficient illumination or
exposure is avoided, and the definition of optical fiber observation imaging is improved.