Method and apparatus for inspecting layering quality of printing objects using femeto-second laser beam in 3d printing process and 3d printing system having the same

摘要

A method, an apparatus, and a system including the same are provided for inspecting the stacking quality of a printed object using a femtosecond laser beam during a 3D printing process. In accordance with an aspect of the present invention, a method of inspecting the stacking quality of a printing object using a femtosecond laser beam during a 3D printing process includes from a femtosecond laser source disposed coaxially with a 3D printing laser source to inspect the state of the printing object. The step of irradiating the laser beam, the step of separating the laser beam generated from the femtosecond laser source into a pump laser beam and a probe laser beam, a printing laser beam or a pump laser beam irradiated from a 3D printing laser source to the object to be printed and ultrasound Generating, irradiating a probe laser beam on a printing object to measure ultrasonic waves, detecting a probe laser beam reflected by the printing object, and analyzing the reflected probe laser beam to check the quality of the printed object Includes steps.