提出一种利用等倾干涉测定透明平板楔角的方案,即通过测定任意互垂两个方向的夹角来推求出楔角数值和方位. 利用解析几何易于证明,二个平面之间所夹的二面角,可以通过某一方位的夹角,用以下关系确定(图1): 为了便于测量,可选二个方位相应的1、2来定,即取如果令,则得它们是严格 This paper presents a scheme of measuring the wedge angle of transparent slab by means of isometric interference by deducing the wedge angle value and azimuth by measuring the included angle between arbitrary two perpendicular directions.Using analytic geometry it is easy to prove that the two planes are sandwiched between The dihedral angle, which can be determined by the angle of an azimuth, is determined by the following relationship (Figure 1): In order to facilitate the measurement, two azimuths corresponding to the choice of 1, 2, that is, if so,