LASER TRANSMITTER IN PARTICULAR FOR THE GENERATION OF ULTRASONIC WAVES AND ITS APPLICATION TO A NON-DESTRUCTIVE NON-CONTACT CONTROL DEVICE.

摘要

A laser transmitter particularly intended for generating controlled-directivity ultrasonic waves, and comprising, inter alia, an optical cavity resonator (10) made up of two plane and parallel mirrors (11, 12) of which one (11) is completely reflective while the other (12) is partially reflective, as well as a laser generator (20) placed between said mirrors for transmitting radiation (R) perpendicularly thereto and exiting through mirror (12), wherein said generator (20) consists of plates (200) made of an active material and directed in such a way that the longitudinal axes thereof are perpendicular to said mirrors, said plates being attached to one another, and wherein a multiple-contact synchronising switch (30) is arranged between the generator (20) and the completely reflective mirror (11) to cause sequential plate emission (200). The laser transmitter may be used in nondestructive tests, in particular those using thermoelasticity or ablation.