METHOD OF CONTACTLESS MEASUREMENT OF THREE-DIMENSIONAL OBJECT LINEAR DIMENSIONS Russian patent published in 2008 - IPC G01B11/24 

FIELD: physics.

SUBSTANCE: method of contactless control of three-dimensional object linear dimensions implies that multiple sounding structured illuminations are formed on surface of controllable object by lighting surface of controllable object with optical radiation beam, every time controlling spatial modulation of optical radiation beam intensity. Besides, method includes consecutive registration of images of sounding illumination structure distorted by surface relief of controlled object and heighting of surface relief of controlled object by distortion of sounding illumination structure image and by two other coordinates that is by position of illumination structure distortions in registered images. For each point of controlled object dependence of registered radiation intensity on image number is estimated. Dependences obtained within calibration surface calibrating, of registered radiation intensity on image number are used for calibration surface points at its various distances to surface considered as reference. Heighting of surface relief of controlled object is evaluated by distance from reference surface to calibration surface point where dependence of registered radiation intensity on image number is most similar to dependence in analysed point of controlled object.

EFFECT: improved accuracy of three-dimensional object linear dimensions control and expansion of monitoring procedure possibilities.

1 dwg