Fully symmetric nulling beam combiners.

@article{Serabyn2001FullySN,
  title={Fully symmetric nulling beam combiners.},
  author={Eugene Serabyn and M. Mark Colavita},
  journal={Applied optics},
  year={2001},
  volume={40 10},
  pages={1668-71}
}
A simple method of nulling broadband light is presented. A mirror-symmetric pair of right-angle periscopes is first used to introduce a geometric field flip between two incident light beams, after which the light is combined by means of one of a number of constructive two-beam interferometers. A reciprocal pair of beam-splitter passages provides for complete symmetry. Such an approach greatly eases beam-splitter design requirements and should find use both in initial ground-based nulling… CONTINUE READING