Abstract
With continued advances in cylindrical optics manufacturing capability, interferometric testing of such optics is difficult. This is due to the lack of a well characterized cylindrical reference surface. In this paper, the Random Fiber Test (RFT) is used to experimentally quantify the quality of fiber surface as a cylindrical reference. The basic idea of the experiment is to take measurements at different rotations about, and translations along the fiber axis. From these measurements the quality of the fiber surface in both directions can be determined.