OPTICAL DEVICE AND METHOD FOR DETERMINING SPATIAL COORDINATES OF SURFACES OF MACROSCOPIC OBJECTS BY TRIANGULATING TWO LINE-SCAN CAMERAS

摘要

The invention relates to a device and a method for determining spatial coordinates of surfaces of macroscopic objects (1). The proposed device comprises a line projector (6), two line-scan cameras (7), and a control and evaluation unit (8), wherein the control and evaluation unit (8) is designed to perform the following steps: - controlling the line projector (6) such that the line projector projects a series of different intensity distributions (12) within a plane that remains the same for said series, - controlling the line-scan cameras (7) such that each of the line-scan cameras (7) captures a one-dimensional image for each of said intensity distributions (12), such that a series of measured values is determined for each pixel of an image line (10) of the particular line-scan camera (7), - determining pixels of the two image lines (10) of the two line-scan cameras (7) that correspond to each other by correlating the series of measured values determined by means of the two line-scan cameras (7), and - calculating spatial coordinates for a plurality of points of a line of intersection of the projected intensity distributions (12) with an object surface by triangulation.