A detector (110) for determining a position of at least one object (112) with regard to at least one optical sensor (120) is proposed, wherein the optical sensor (120) has an image plane (122). The detector (110) comprises: at least one illumination source (134), wherein the illumination source (134) emits at least one light beam (136), wherein the light beam (136) comprises a component which is parallel to the image plane (122) of the optical sensor (120); the optical sensor (120), wherein the optical sensor (120) has a sensor region (126) in the image plane (122), wherein the optical sensor (120) is adapted to determine a transversal component of the position of the object (112) in an event where the object (112) approaches the optical sensor (120) in a manner that light is scattered from the component of the light beam (136) conducted parallel to the image plane (122) of the optical sensor (120), the transversal component of the position being a position in the image plane (122) of the optical sensor (120), the optical sensor (120) being adapted to generate at least one transversal sensor signal from the light scattered from the component of the light beam (136) conducted parallel to the image plane (122) of the optical sensor (120) in the sensor region (126), wherein the optical sensor (120) is further designed to generate at least one longitudinal sensor signal in a manner dependent on an illumination of the sensor region (126) by light which is scattered from the component of the light beam (136) conducted parallel to the image plane (122) of the optical sensor (120), wherein the longitudinal sensor signal is dependent on a variation of an intensity of the light is scattered from the component of the light beam (136) conducted parallel to the image plane (122) of the optical sensor (120) in the sensor region (126); and an evaluation device (132), wherein the evaluation device (132) is designed to generate at least one item of information on a transversal component of a position of the object (112) by evaluating the transversal sensor signal and wherein the evaluation device (132) is further designed to generate at least one item of information on a longitudinal component of a position of the object (112) by evaluating the longitudinal sensor signal.