AN INTERFEROMETER, A METHOD OF PROVIDING AN INTERFEROMETER, A LIGHT EMITTER, AND A MEANS FOR MOVING A MIRROR

摘要

A compact interferometer and a moving means and a light emitter for an interferometer. The compact interferometer has increased light throughput and may be provided in a single block of e.g. metal in order to be easier to manufacture, set up, align and in which the atmosphere is more easily controlled. The moving means has a rigid magnet part travelling within a coil part, increasing the stiffness and controllability of the system. The light emitter is a filament having a bifilar coil where no part of the filament extends within the coil.