Abstract
Peak–valley accuracy of λ/20 over a range of 2λ is not unusual in an interferometric null test. For the larger dynamic ranges of a nonnull test, however, the fringe-imaging optics degrades the accuracy. We classify the errors introduced and analyze them in the context of both general and third-order aberration theory. We can predict the measurement error from known interferometer parameters, and we illustrate this for a single mirror. The errors are tabulated for the specific case of a fourth-order asphere with 100 µm of sag. We show that the third-order approximation is comparable with exact ray-trace results for this case.
© 2000 Optical Society of America
Full Article | PDF ArticleMore Like This
Paul E. Murphy, Thomas G. Brown, and Duncan T. Moore
Appl. Opt. 39(34) 6421-6429 (2000)
John E. Greivenkamp and Robert O. Gappinger
Appl. Opt. 43(27) 5143-5151 (2004)
Rui Zhang, Yongying Yang, Hongyang Zhao, Zijian Liang, Shengan Liu, and Jian Bai
Appl. Opt. 59(18) 5447-5456 (2020)