3、其作用像衍射光栅。当入射光照射到此光栅后将产生布喇格衍射,其衍射光 的波长与高频驱动电信号的频率有着一一对应的关系。因此,只要改变RF驱动信号的频率,即可改变衍射光的波长,进而达到了分光的目的。【关键字】声光滤波器,光谱仪器,声光效应,AOTF成像。【Abstract】 thispapermainly AOTF angleofincidentlight effectontheperformance of AOTF. Acoustooptictunablefilter (Acousto-opticTunableFilter,AOTF) the principleisbasedon
4、optical devicesmade acousto-optic diffractionprinciple, it iscomposedof crystalandthe transducer in the constitution,transducer frequency RF drivesignal (usuallyaround tensof megahertztotwohundredmegahertz) into ultrasonicvibration inthecrystal, ultrasonic themodulation ofspatialperiodicity,
5、itsrole as adiffractiongrating. Whentheincident light tothe grating willproduce Braggdiffraction, thediffraction lightwavelength and frequency drivesignal frequency is oneonetoonecorrespondence. Therefore, aslongasthechangein theRF frequencyofthedrivingsignal, canchangethe diffraction lightwa