Patent ID: 6833909
Filing Date: 2004-12-21
Classification: G01C,G01S

Abstract:
A device for optical distance measurement, comprising an emitter unit (12) having a light source (17, 18) emitting a modulated optical beam (13, 20, 22) to a target object (15) a receiver unit (14) spaced apart from the optical axis (38) of the emitter unit (12) with at least one optical detector (54) for receiving the optical beam (16, 49, 50) returning from the target object (15); and a control and evaluation unit (36) for ascertaining the distance (48) of the device from the target object (15), wherein an active, light-sensitive face (66, 67, 68, 69) of the detector (54) of the receiver unit (14) narrows in the direction (61) of a beam displacement for decreasing target object distances (48) that is due to the parallax of the returning beam (16).