Two-Dimensional Phase-Diverse Stokes Spectrometer

Abstract

Optical bers may be used to rearrange a two-dimensional eld of view into a slit-like conguration feeding a spectrometer. In the- ory, such input reconguring permits two-dimensional Stokes spectrom- etry with phase-diverse/speckle restoration to the diraction limit and represents an alternative to adaptive optics for small telescopes. In prac- tice, the question is whether current ber technology achieves such recon- guration without loss of angular resolution at acceptable spectrograph speed and light loss. A feasibility study is undertaken for application at the Dutch Open Telescope.