High-resolution quadruple-channel heterodyne laser velocimeter based on birefringent optics

摘要

Recently we introduced a dual-beam heterodyne interferometer where combinations of half-silvered and fully reflecting mirrors were used to achieve beam doubling. We now propose a quadruple-beam system in which birefringent beam displacers generate the four parallel beams. We present the design and the performance characteristics of this apparatus. (C) 2007 Elsevier GmbH. All rights reserved.