Quick inspection of large composite structures posts significant challenge and interest to NASA. The low cost, light weight, handheld device that can provide quick inspection and imaging of various defects (such as delamination and disbond) and damages (e.g., fiber breakage and impact damages) for various composite structures and bonded assemblies should also be extremely valuable to advanced mechanical components and systems. The proposed LAUT system has many market applications in different industries such as the air and space, defense and energy sectors. Customers should include the US government agency, including DOD, DOE, DOT, and commercial companies such as Boeing, GE, etc. The total market will increase in the future because of the rapidly expanded use of composite materials in many mechanical components and system to improve the system's efficiency and overall performance.