An holographic camera composed of two ruby lasers was built at ISL. It provides double exposure holograms with an adjustable time interval ranging from few ns to infinity. Various aircraft structures were first tested at ISL in laboratory conditions: honeycomb panels, wings ... The industrial tests on a military aircraft in maintenance checking were performed in a hangar of the SNIAS at Saint-Nazaire: wings, trap-door of the rear landing gear, air-brake... Electromechanical shocks were used to make the structure vibrate and to allow a fast trigger of the lasers. This avoids disturbance due to ambiant noises and vibrations.
Pulsed Holographic Nondestructive Testing On Aircraft
Max Born Centenary Conf ; 1982 ; Edinburgh,United Kingdom
Proc. SPIE ; 0369
16.06.1983
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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