Precision optical fabrication and test methods applied to the SXT grazing incidence mirror assembly

Details Precision optical fabrication and test methods applied to the SXT grazing incidence mirror assembly Precision optical fabrication and test methods applied to the SXT grazing incidence mirror assembly

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1160..465h&link_type=abstract

IN: X-ray/EUV optics for astronomy and microscopy; Proceedings of the Meeting, San Diego, CA, Aug. 7-11, 1989 (A90-46006 21-74).

Physics

Optics

Grazing Incidence, Mirrors, Systems Engineering, X Ray Imagery, X Ray Telescopes, Interferometry, Structural Design, Surface Finishing

Scientific paper

Unique mechanical and optical design features of this solar X-ray telescope were required to survive launch, and to achieve excellent imagery over a large field of view. These design features placed exceptional demands on all of the manufacturing and measurement processes. Survivability dictated use of a monolithic mirror assembly with both optical surfaces generated and polished on the same substrate. Good performance dictated a maximum axial separation of 5 mm between these surfaces (H-1 and H-2), placing difficult restrictions on the generation, polishing, and smoothing operations. The wide field requirements of a solar imager placed unprecedented tolerances on measurement and control of H-1 to H-2 alignment, delta-delta Radius, and absolute axial sag, because of the short axial dimension. An additional portion of the error budget for delta-delta Radius had to be given to large on-orbit thermal variations, tightening this specification even further.

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