Patent ID: 9599712
Date: 2017-03-21
CPC Classifications: G01S,G05D

Claim:
1. A method for providing distance information of a scene with a time-of-flight sensor or camera, comprising the steps of: emitting a periodic light signal towards the scene in accordance with a modulation signal based on a clock timing that has a base frequency spread by a periodic perturbation with a perturbation frequency and period, receiving reflections of the periodic light signal from the scene, evaluating a time-of-flight information for the received reflections of the periodic light signal over a set of a plurality of measurement durations in accordance with the modulation signal, and deriving distance information from the time-of-flight information for the received reflections, wherein each measurement duration of the set is an integer or half integer multiple of the perturbation period and over the set of measurement durations the average base frequency is kept constant.