Weakener with position identification function

The utility model discloses a weakener for a total station and a laser range finder. The weakener is arranged on an optical axis of receiving optical path of the total station and the laser range finder and is used for regulating light intensity of a laser echo signal. A body of the weakener is a circular light-transmitting material; an outer shading area and an inner shading area which are annular are formed in the body; attenuation films with different transmittances are respectively coated on the outer shading area and the inner shading area so as to respectively divide the inner and outer shading areas into an all-transparent area, a transitional transparent area and a non-transparent area; the area and positions of the three transparent areas are different due to difference between the inner shading area and the outer shading area. According to the utility model, a novel light path principle is adopted, the weakener is arranged on the receiving light path, and light spots caused by the weakener arranged