Interferometry Applied to Testing Large Optics

摘要

The polishing and figuring of moderate to large optics (> ～ 30cm diameter) places stringent demands on optical metrology. These demands arise due to the combination of large physical size and mass, long optical path-lengths in a direct optical test, and the increasing requirement for fast focal ratios. This paper summarizes some important aspects of the subject and overviews some approaches used at the Optical Science Laboratory and elsewhere.