| 摘要 |
PURPOSE:To provide an optical device converting a two-frequency laser beam being elliptic polarization approximately intersecting orthogonally to linear polarization perfectly intersecting orthogonally and eliminating cross-talk in a heterodyne interference device. CONSTITUTION:The two-frequency laser beam is separated to two optical paths, and the one side polarization is converted to the linear polarization by using phase shifters 2, 6 in respective optical paths, and thereafter, the beams without cross-talk are taken out by polarizers 4, 10 in a direction perpendicular to the linear polarization to be synthesized by a polarization beam splitter 5. |
