Dispersion in stellar interferometry.
暂无分享,去创建一个
The effects of uncompensated dispersion on the fringe visibility in a two beam interferometer are examined for a long baseline stellar interferometer with a path compensator in air rather than in vacuo. We derive a criterion based on the central fringe visibility for evaluating the effects of dispersion and develop a method for selecting suitable compensating media. By limiting the optical bandwidth to ~100 nm and using a compensating system with two glasses it is possible to achieve high fringe visibility in a stellar interferometer with excess air paths of the order of 500 m. The results are generally applicable to other two beam interferometers.
[1] J. Owens,et al. Optical refractive index of air: dependence on pressure, temperature and composition. , 1967, Applied optics.
[2] L. Mertz. Transformations in optics , 1965 .
[3] James R. Birch,et al. Dispersive Fourier transform spectroscopy , 1987 .