Patent ID: 7791714
Filing Date: 2010-09-07
Classification: G01S

Abstract:
1. A device for recording distance-measuring images, comprising: a light source to emit light pulses; a photodetector to integrate a light stream of a light pulse, wherein the light stream is reflected on an object region via a time window whose time interval is variable in relation to the process of emission of the light pulse, into a multiplicity of light quantity values; and an evaluation unit to determine a distance to the object region based upon a correlation function formed by the light quantity values, wherein the evaluation unit determines extreme values of a gradient of the correlation function and determines therefrom the distances of differently distant object regions, wherein the evaluation unit determines the position of the extreme values of the gradient based upon a difference function of the correlation function, and wherein the difference function contains the differences between a determined value of the correlation function and an adjacent value of the correlation function.