An acousto-optic deflector(AOD)driven by a beat frequency signal generated two overlap gratings inside the acousto-optic(AO)crystal and diffracted the incident laser beam into two first-order beams.
英
美
- 該系統利用拍頻信號驅動(dòng)聲光偏轉器,在聲光晶體中形成兩個(gè)重疊的光柵,光源發(fā)出的激光以布拉格角入射,形成兩束一級衍射光,經(jīng)透鏡聚焦形成光強按正弦規律分布的結構光條紋。
