Method for detecting distortion of light pattern defining code word and light pattern

A method of detecting a distortion of a light pattern defining a code word, the method comprising the steps of: projecting a light pattern by means of a light source, wherein the light pattern referred to a reference plane represents a reference light pattern, wherein the reference light pattern comprises individual light pattern elements arranged at a distance from each other and arranged in a plurality of successive columns in the direction of a first extension axis, and wherein the number and/or position of the at least one light pattern element in each column of the reference light pattern is an encoding feature and a sequence of light pattern elements in a predetermined number of successive columns define a code word, detecting the light pattern by means of an optical sensor, wherein at least a partial number of the light pattern elements of the reference light pattern define at least one predetermined geometric pattern, that the at least one geometric pattern is detected in the detected light pattern an