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Inverting Image Data For Optical Testing And AlignmentData from images produced by slightly incorrectly figured concave primary mirror in telescope processed into estimate of spherical aberration of mirror, by use of algorithm finding nonlinear least-squares best fit between actual images and synthetic images produced by multiparameter mathematical model of telescope optical system. Estimated spherical aberration, in turn, converted into estimate of deviation of reflector surface from nominal precise shape. Algorithm devised as part of effort to determine error in surface figure of primary mirror of Hubble space telescope, so corrective lens designed. Modified versions of algorithm also used to find optical errors in other components of telescope or of other optical systems, for purposes of testing, alignment, and/or correction.
Document ID
Document Type
Other - NASA Tech Brief
Shao, Michael
Redding, David
Yu, Jeffrey W.
Dumont, Philip J.
Date Acquired
August 16, 2013
Publication Date
September 1, 1993
Publication Information
Publication: Laser Tech. Brief.
Volume: 1
Issue: 1
Subject Category
Physical Sciences
Report/Patent Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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