Wavefront error sensing

Details Wavefront error sensing Wavefront error sensing

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986stin...8812030t&link_type=abstract

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Physics

Optics

Adaptive Optics, Control Systems Design, Large Space Structures, Parabolic Reflectors, Pointing Control Systems, Self Adaptive Control Systems, Spaceborne Telescopes, Wave Front Deformation, Active Control, Algorithms, Compensation, Errors, Large Deployable Reflector, Point Spread Functions, Sensors, Shape Control

Scientific paper

A two-step approach to wavefront sensing for the Large Deployable Reflector (LDR) was examined as part of an effort to define wavefront-sensing requirements and to determine particular areas for more detailed study. A Hartmann test for coarse alignment, particularly segment tilt, seems feasible if LDR can operate at 5 microns or less. The direct measurement of the point spread function in the diffraction limited region may be a way to determine piston error, but this can only be answered by a detailed software model of the optical system. The question of suitable astronomical sources for either test must also be addressed.

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