Physics – Optics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982stin...8232225m&link_type=abstract
In Oslo Univ. LEST: Large European Solar Satellite p 246-253 (SEE N82-32209 22-89)
Physics
Optics
Alignment, Interferometry, Solar Instruments, Telescopes, Tolerances (Mechanics), Aberration, Adaptive Optics, Attitude (Inclination), Diffraction Patterns, Displacement, Paraboloid Mirrors
Scientific paper
Numerical data on LEST alignment tolerances (deformation constants, inclination of primary mirror axis with respect to system axis, inclination of secondary mirror axis, lateral and axial shift of secondary) are given. The alignment system has to provide both inclination and lateral shift of the secondary with respect to the primary and its axis. Tolerances are such, e.g., 15 microns lateral shift, that passive systems cannot assure alignment. A system which places four interferometers in the primary and secondary mirror holes, and uses a zero order white fringe for displacement and tilt detection is proposed. An inclination of the primary can be treated as a lateral shift and tilt of the secondary.
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