Radar-infrared coating pattern etching process method based on ultraviolet laser

The invention discloses an etching process method of a radar-infrared coating pattern based on ultraviolet laser, and relates to an etching process method of an aero-engine radar-infrared coating. Before machining, a three-dimensional scanner is used for scanning a deformed part with a coating or a part with irregular surface curvature, an accurate model of the part with the coating is obtained, the position relation between the part with the coating and etching equipment is established, and the defect that precision is insufficient when a theoretical model is used for machining is overcome; then a model processing means based on UG is provided, UG software is used for preprocessing, the pattern to be machined is accurately attached to the surface of the part instead of being projected to the surface of the part, and pattern distortion caused by curvature change of the model is avoided; and finally, the ultraviolet laser is used for coating etching, so that the problems of incomplete coating processing and ov