Aerospace components require high p

Aerospace components require high precision and close dimensional tolerances. Inspection play key role in development of these components with desired accuracies and dimensional tolerance. Various inspection systems like 3D CMM are generally used for dimensional conformity of these components. In this inspection system, a stylus touches the surface of the component, thereby recording the co-ordinates of the component. But these inspection systems required lot of time in alignment of component and special skills are required in programming the inspection procedures. More over, the inspection process touch the component, so it cannot be used for fragile components and it is very slow and gives information about the limited number of features. With advances in LASER inspection systems, non contact inspection is possible, which is very useful for inspection of fragile and flexible surfaces. LASER CMM is an important system for rapid inspection of components [1]. Fig. 1. Show a typical turbine blade, in which geometry specified in number aerofoil cross sections, which are stacked through a stacking axis. These profiles have stringent dimensional tolerances to meet the aerospace quality requirements. Table 1. shows typical dimensional tolerance of aero engine turbine blade.