Method and device for the filtering acousto - optic programmable of high resolution in the infrared range.

摘要

The present invention relates to a method for filtering acousto - optic programmable of high resolution in the infrared range of an incident optical wave (oi). To this end it proposes the use of a birefringent crystal optical acousto - (tr), the speed of propagation of acoustic waves is low, such as mercury compounds, which crystal acousto - optical system comprises, on one of its faces, a transducer piezo electric - (t) is intended to generate a transverse acoustic wave of the wave vector (k), whose energy propagates along the same axis (delta) but in the opposite direction of the energy of the incident optical wave (1), knowing that the optical wave (od) resulting from the interaction acousto - optic between the incident optical wave (1) and the acoustic wave of the wave vector (k) is diffracted perpendicular or substantially perpendicular to the direction of the incident optical wave (oi).