A triangulation light sensor comprising a light transmitter for transmitting transmission light into a detection zone; a light receiver having an array of reception elements for receiving light from the detection zone which is remitted by an object to be detected, wherein the reception elements generate respective reception signals; a reception optics which is arranged in the optical path between the detection zone and the light receiver and which has a plurality of imaging elements (22A, 22B) for generating respective mutually spaced apart individual light spots (36A, 36B) from the remitted light on the light receiver, wherein the imaging elements (22A, 22B) are arranged in an array at least extending in a triangulation direction, and wherein the positions of the individual light spots (36A, 36B) on the light receiver in the triangulation direction result in dependence on the distance of the object; and an evaluation unit for generating a detection signal from the reception signals on the basis of the positions of the individual light spots (36A, 36B) on the light receiver, characterized in that a detection zone (28A, 28B) comprising a plurality of adjacent reception elements is associated with a respective imaging element (22A, 22B), with each detection zone (28A, 28B) being divided at least into a first part zone (30A, 30B) and a second part zone (32A, 32B), and with a respective boundary between the first part zone (30A, 30B) and the second part zone (32A, 32B) corresponding to the position of an individual light spot (36A, 36B), generated by the associated imaging element (22A, 22B), for an object which is located at a predefined reference distance from the triangulation light sensor; in that the evaluation unit is configured to generate the detection signal on the basis of a difference between the combined reception signals of the reception elements associated with the first part zones (30A, 30B) and the combined reception signals of the reception elements associated with the second part zones (32A, 32B); in that the evaluation unit is configured to determine a sum signal from the reception signals of the reception elements, with the reception signals of the reception elements associated with the first part zones (30A, 30B) being weighted by a first factor and the reception signals of the reception elements associated with the second part zones (32A, 32B) being weighted by a second factor which differs from the first factor at least with respect to its sign; and in that the evaluation unit is configured to generate the detection signal on the basis of the sum signal; and in that the evaluation unit is configured to carry out an association of the reception elements with a respective detection zone (28A, 28B) and/or with a respective part zone (30A, 30B, 32A, 32B) by means of a teaching process, in which an object is arranged at the desired reference distance, and/or on the basis of an association table or association function in dependence on the reference distance; and in that the imaging elements (22A, 22B) are separated from one another by a separation web which is impermeable to light and which extends between the reception optics and the light receiver.