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以双晶两光率体剖面及剖面半径与偏光镜方向交角是否相同,即以双晶两单体干涉色与亮度是否相同及这二者综合结果来阐明卡—钠双晶光学现象。并指出前人文献对这些光学现象描述的不周全,及⊥α轴切片上卡—钠双晶与卡斯巴双晶光学现象的相反。用赤平极射投影图示卡—钠双晶等有关双晶⊥(010)晶带的切片上两光率体方向上关系,以阐明卡—钠双晶光学现象,其中包括卡—钠双晶与卡斯巴双晶两特殊方向切片上的光率体关系,及偏近这两个特殊方向的两类切片上光率体的关系,此外还图示卡—钠双晶两光率体之间有以钠长石双晶轴和卡斯巴双晶轴先后转动180°的方向关系。
In order to clarify the card-sodium bi-crystal optical phenomenon, the relationship between the birefringence and the cross-sectional radius and the polarizer orientation is the same. It is also pointed out that the previous literature does not describe these optical phenomena completely, and the opposite of the phenomenon of card-sodium bismuth and Casper birefringence on the ⊥ -axis section. A stereographic projection of the polar diagram shows the relationship between the orientation of the two light bodies on the slice of the twin ⊥ (010) band, such as soda-sodium bicrystal, in order to elucidate the card-sodium bi-crystal optical phenomena, including the sodium- The relationship between the rate of light body and the relationship between the rate of light body on two special direction slices of Kaspar double crystal and two types of slice on the two special directions are also shown There is a relation between the directions of rotation of the albite double-crystal axis and the Casper double-crystal axis successively by 180 °.