Patent ID: 6141884
Filing Date: 2000-11-07
Classification: G01B

Abstract:
A coordinate measurement device comprising:an optical sensing system for non-contact sensing of edges or structures of measurement objects;a CCD camera which images the edges or structures of the measurement object on a CCD matrix via an objective and in which the distance between the objective and CCD matrix can be changed for adjusting the magnification;a displacing device for displacing the sensing system in at least one coordinate direction;an actuating element arranged at the objective of the sensing system and a driving element provided at the coordinate measurement device outside of the sensing system, the actuating element and driving element being able to be brought into a working connection, so that when the working connection exists, the actuation of the displacing device leads to a change in the distance between the objective and CCD matrix, whereas when the working connection is canceled the actuation of the displacing device allows a focusing on the measurement object with the distance between the objective and matrix remaining the same;cross-line generators and a circuit arrangement for additive mixing of the line signals generated electronically in the line generators with the signals of the CCD elements of the CCD matrix, wherein the time base for the cross-line signals is the readout clock of the CCD elements of the CCD matrix;a logic function arrangement for linking the CCD elements representing the vertical lines and horizontal lines, wherein said logic function arrangement communicates on the output side with a first input of a flip-flop circuit which is connected by a second input to an output of a comparator and is connected by its output, via a feedback resistor, with a second input of the comparator which is simultaneously connected with the output for a position detection system; anda video transmitter for wireless transmission or wire-bound transmission of the sensing system signals to a video receiver of an evaluating and display unit.