Ringy aperture

• 环形孔径

Ringy aperture的用法和样例：

例句

1. In this paper, Annular aperture cone glass shearing laser speckle photography used for measuring the derivatives of displacements is proposed for the first time.
   研制了环形孔径锥镜剪切相机，并利用它进行激光散斑照相，测量物体的位移导数场。