Yahoo奇摩字典 網頁搜尋

  1. optical axis

    • IPA[ˈäptəkəl ˌaksəs]
    • n.
      a line passing through the center of curvature of a lens or spherical mirror and parallel to the axis of symmetry.;a direction in a doubly refracting crystal along which a light ray does not undergo double refraction.
    • noun: optical axis, plural noun: optical axes