Physics – Optics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..854g&link_type=abstract
IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 2 (A91-23201 08-89
Physics
Optics
2
Altitude Control, Azimuth, Bearings, Reflecting Telescopes, Self Alignment, Cassegrain Optics, Degrees Of Freedom, Resonant Frequencies, Ventilation
Scientific paper
The present evaluation of the design philosophy of the Apache Point Observatory's 3.5-m altazimuth-fork mount telescope gives attention to such detail-design problems as the mirror-cover system, the upper azimuth bearing and support system, and the spherical bearing mountings. A four-roller constraint for the upper azimuth bearing and support system proved to be a superior design solution than the originally intended two-roller constraint. A cone-shaped structure on the lower fork defines the azimuth axis; the center of the drive disk defines the top end of the axis while the spherical roller thrust bearing defines the lower end.
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