METHOD OF CALIBRATING SELECTIVE LASER FUSION APPARATUS Russian patent published in 2025 - IPC B29C64/393 B33Y50/02 

FIELD: physics.

SUBSTANCE: invention relates to a method of calibrating a selective laser fusion apparatus. Technical result is achieved by a method of calibrating a chamber for constructing an installation based on a reference object and subsequent calibration of the laser channel of the installation based on a test object. Calibration of the chamber includes: placing a reference object with applied markers on the growth table of the installation; photographing the reference object with the built-in video camera fixed in the SLF installation; determining fragments in which marker nodes will be calculated; calculation of marker nodes coordinates on fragment; establishing a connection between object coordinates of nodes on the reference object and nodes on the image. Calibrating the laser channel includes: placing the test object on the growth table of the installation; formation of markers by laser radiation on test object working surface in accordance with reference object markers; formation by laser radiation on test object working surface of initial position of laser channel beam with provision of transition into coordinate system of laser channel of installation; photographing the working surface of the test object with a built-in video camera located fixedly in the SLF installation; determining fragments in which marker nodes will be calculated; calculation of marker nodes coordinates on fragments; determining actual coordinates of nodes by interpolation based on established correspondence between nodes in image space and object coordinates thereof; calculation of deviations between actual and given coordinates of units; making corrections to the control program of the scanning system.

EFFECT: high calibration accuracy, reduced deviation of laser channels after calibration, eliminating the effect of image distortion caused by the position of the video camera on calibration, reduced calibration time and number of consumable materials with simultaneous calibration of several laser channels.

5 cl, 6 dwg