biaxial crystal meaning in English

二光轴晶体
二轴晶体
双轴晶体

New calculation method of the optic axial angle of the biaxial crystal
双轴晶体光轴角计算的新方法
The characteristics of different nonlinear crystals for frequency - doubled nd : yag 946 nm laser have been compared , a biaxial crystal , lbo , has been chosen for frequency doubling in our experiment
给出了几种晶体用于946nm倍频时它们倍频特性比较，为优化选择倍频晶体提供了依据。