ACOUSTIC-OPTICAL DEFLECTOR Russian patent published in 2006 - IPC G02F1/33 

FIELD: signal optical processing.

SUBSTANCE: acoustic-optical deflector relates to signal optical processing at volumetric acoustic waves and it can be used in acoustic-optical spectrum analyzers, microwave range radio signals parameter meters as well as in communication systems and radiolocation. Acoustic-optical deflector has light/sound-pipe made in form of prism which has lower face, onto which face the piezoelectric converter is disposed, which converter excites ultrasonic beam with angle of drift γ, and top face with sound absorber applied to the face. It also has two light-transparent side faces. Light is applied to the first side face at angle θ_S1=90°-γ-θ_B=-[γ+θB(f0]) (f₀), where θ_B(f₀) is Bragg angle at control frequency f₀. Lift diffracts through second side face at angle of θ_S2=90°+γ-θ_B(f₀). First face of light/sound-pipe has angle of inclination of θ_S1=-[γ+θ_B(f₀]) to surface where piezoelectric converter is disposed. Angle of inclination of the second face equals to θ_S2= [γ-θ_B(f₀)].

EFFECT: improved precision of positioning of diffracted spot; improved diffraction efficiency.

4 dwg