K9玻璃低压下的双折射效应研究(Ⅱ)

STUDY OF K9 GLASS BIREFRINGENCE EFFECT UNDER LOW PRESSURE

继文献[1]之后,我们又用激光外差干涉仪测量了K9玻璃低压(0～3.5kg)下的双折射率,发现△~n_o～F和△~n_o～F呈不同的变化规律,这个现象是由样品内部应力分布的不均匀所导致的,反映了实际天文透镜自重引起的双折射率变化。

The birefringence effect of K9 glass was measured with a laser heterodyne interferometer under low pressure (0-3.5kg).It was found that △n,～F and △n_0～F have different change laws,, which are due to the nonuniformity of stress distribution inside asample, and reflect the birefringence charge caused by a practical astrononical lens.