Patent ID: 9528819
Filing Date: 2016-12-27
CPC Classification: G01B,G01C,G01S,G02B

Claim Text:
1. A three-dimensional laser scanner instrument for acquiring three-dimensional geometric data of a scene, said three-dimensional laser scanner instrument comprising an illumination system for generating a light beam and for scanning an illumination point of said light beam through said scene, a light detection system comprising at least one light detector, said light detection system being arranged to receive light from said scene, and an optical system for imaging light scattered in or reflected from said scene onto said light detection system; characterized in that light detection system comprises a controllable filter element for dynamically discriminating light impinging from selected regions of said scene and a control unit operatively connected to said controllable filter element and to said illumination system, wherein in operation of said scanner instrument, said filter element is controlled by said control unit so as to guide only light impinging from a selected, spatially delimited region around said illumination point in said scene onto said at least one light detector.