Mathematics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7010e.126d&link_type=abstract
Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter. Edited by Oschmann, Jacobus M., Jr.; de Graauw, M
Mathematics
Scientific paper
A ribbon-shaped primary objective grating (POG) telescope lends itself to deployment in space, because it can be stowed for transport on a roll. Unlike mirrors which need to be segmented for sizes beyond the diameter of the fairing or payload bay, the ribbon is a continuous integral surface transported on a drum and unfurled during deployment. A flat POG membrane abandons a standard three dimensional figure requirement of mirrors and solves the problem of making primary objectives from tensile structures. Moreover, POG telescopes enjoy relaxed surface dimensional tolerances compared with mirrors. We have demonstrated mathematically and empirically that the tolerance for flatness relaxes as the receiving angle increases toward grazing exodus where the magnification of the POG is greatest. At the same time, the tolerance for phase error is worsened as the angle of reconstruction moves toward grazing exodus. The problem will be aggravated by the rigors of the space deployment environment. We give a mathematical treatment for the flatness and phase error. We mention engineering methods that could ameliorate the error.
Ditto Thomas D.
Ritter Joseph M.
No associations
LandOfFree
Phase errors in gossamer membrane primary objective gratings 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 Phase errors in gossamer membrane primary objective gratings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase errors in gossamer membrane primary objective gratings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1808842