BORESCOPE WITH HOLOGRAPHIC TESTING CAPABILITY
Publication Date: 2016-May-19
The IP.com Prior Art Database
On-wing inspection of aircraft parts is done primarily using 2D image information, which is insufficient for assessing most defects. The invention describes a borescope with holographic testing capability for inspection of aircraft engines. The holographic borescope uses two laser beams, one to illuminate the component, and the other to provide a reference. A camera sensor placed near the tip of the borescope receives a holographic image of the component with interference patterns via a lens and a pixelated mask. The interference patterns are used to create a holographic recording. The component is then given acoustic excitation while recording the holograph, which is characteristic of how the part vibrates or bends. The holographic pattern reveals any cracks or defects present in the component. The invention provides a rapid means of identifying defective aircraft engine components with a high degree of confidence using a portable device, thereby saving costs.