公开(公告)号：US6018418A

公开(公告)日：2000-01-25

申请号：US244285

申请日：1999-02-03

申请人： Jing-Jong J. Pan ,  Kai Zhang ,  Yonglin Huang

发明人： Jing-Jong J. Pan ,  Kai Zhang ,  Yonglin Huang

IPC分类号： G02B5/30 ,  G02B6/34 ,  G02B27/28

CPC分类号： G02B6/2713 ,  G02B27/283 ,  G02B5/3083 ,  G02B6/2773

摘要： An improved polarization beam splitter formed by a collimator and two similarly shaped, birefringent crystal prisms is provided. The light from the collimator is incident upon the first face of the first birefringent crystal prism which also has second and third faces. The collimated light is incident upon the second face at an angle .phi. with respect to a line normal to the second face so that light polarized perpendicular to a plane of incidence upon the second face is reflected toward the third face and light polarized in the plane of incidence is refracted at the second face. The second birefringent crystal prism has a second face parallel to, and in close proximity with, the second face of the first birefringent prism so that light refracted at the second face of said first prism is refracted at the second face of the second prism and into the second prism. A first face of the second prism is positioned with respect to its second face so that light refracted into the second prism is refracted at the first face from the second prism cross-sectionally undistorted with respect to a cross-section of the light polarized in the plane of incidence at the second face of the first prism. This polarization beam splitter can handle high power without distorting the beam.

摘要翻译： 提供了由准直器和两个类似形状的双折射晶体棱镜形成的改进的偏振分束器。 来自准直器的光入射到第一双折射晶体棱镜的第一面上，该第一双折射晶体棱镜也具有第二和第三面。 准直光以与第二面垂直的线成角度地入射在第二面上，使得垂直于第二面的入射平面偏振的光被朝向第三面反射，并且在 发生率在第二面折射。 第二双折射晶体棱镜具有与第一双折射棱镜的第二面平行且非常接近的第二面，使得在所述第一棱镜的第二面处折射的光在第二棱镜的第二面折射并且进入 第二棱镜。 第二棱镜的第一面相对于其第二面定位，使得折射入第二棱镜的光在第一面处从第二棱镜折射成相对于在第二棱镜的偏振光的横截面为横截面不变形 在第一棱镜的第二面处的入射面。 该偏振分束器可以处理高功率而不会使光束失真。