But there is less research on the dynamic property of the light loop of conical refraction.
但是，锥形折射光环的动态特性却少有人研究。
The phenomenon of hollow beam emerged by conical refraction from biaxial crystal, have been noticed in the early nineteenth century.
双轴晶体锥形折射产生空心光束的现象早在十九世纪初就被人们所注意。
The phenomenon of hollow beam emerged by conical refraction from biaxial crystal, have been noticed in the early nineteenth century.
双轴晶体锥形折射产生空心光束的现象早在十九世纪初就被人们所注意。
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