Airy-type beams generated by finite apertures

In the last six years the so called Airy beam has called the attention of many researchers of the optical community. This new nondiffracting beam has slightly different properties, the most intriguing is that its main spot propagates according to a parabolic trajectory, which gives the idea of a bent propagation or a self-accelerated beam. In this paper it is presented a very effective analytic method, based on suitable superposition of exponentially decaying Airy beams, capable of describing Airy-Type beams generated by finite apertures. We demonstrated the method´s potentiality applying it to describe a truncated Ideal Airy beam.