Computer Science
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7731e.167z&link_type=abstract
Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave. Edited by Oschmann, Jacobus M., Jr.; Clampin
Computer Science
Scientific paper
Many modern optical designs employ diamond-turned optical components and utilize phase retrieval for metrology during testing, assembly, and commissioning. The accuracy of the wavefronts obtained by phase retrieval depends on the fidelity of the system model used during the retrieval, including knowledge of the pupil amplitude, and the relationship between the digital sample spacing in the pupil and each point spread function (PSF), i.e., the plate scale. However, recent simulations have shown that errors in the estimation of both the plate scale and unknown pupil vignetting can both lead to mid-spatial-frequency groove-like errors in the wavefront maps obtained by phase retrieval. In particular, these errors manifest themselves as concentric rings resembling diamond-turning tooling marks, and can therefore easily confound metrology results involving diamond-turned components. Furthermore it was found that only moderate amounts of pupil vignetting, and errors in sampling ratio as low as 2% produced groove errors consistent in magnitude with typical diamond-turning specifications. This paper presents the results of this study on the magnitude and nature of these artifacts and their impact on telescope metrology.
Fienup James R.
Zielinski Thomas P.
No associations
LandOfFree
False diamond turning artifacts in phase retrieval results does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with False diamond turning artifacts in phase retrieval results, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and False diamond turning artifacts in phase retrieval results will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1374617