15 results about "Acousto optic deflector" patented technology

An acousto-optic deflector (AOD) spatially controls the optical beam. In the operation of an acousto-optic deflector the power driving the acoustic transducer is kept on, at a constant level, while the acoustic frequency is varied to deflect the beam to different angular positions. The acousto-optic deflector makes use of the acoustic frequency dependent diffraction angle, where a change in the angle Δθd as a function of the change in frequency Δf given as, (12) Δθd=λ/νΔf where λ is the optical wavelength and ν is the velocity of the acoustic wave.