| 摘要 |
<p>Methods and apparatus that combine dispersion interferometry with refractometry to compensate for refractive index fluctuations in the measurement path (20, 22) of a dispersion interferometer (44) over both short and long time periods. Dispersion and refractometry data (16) are weighted over appropriate time intervals, and means and methods are also provided for initializing GAMMA , the inverse dispersive power, so that the dispersion and refractometry data (16) are self consistent. A refractometer (26) is placed in close proximity to the measurement path (20, 22) of the dispersion interferometer (44) to experience substantially the same air flow and act as a surrogate for obtaining information about the index of refraction.</p> |
