Computer Science
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982spie..332..382g&link_type=abstract
IN: International Conference on Advanced Technology Optical Telescopes, Tucson, AZ, March 11-13, 1982, Proceedings (A83-30976 13
Computer Science
1
Active Control, Dynamic Structural Analysis, Paraboloid Mirrors, Reflecting Telescopes, Servocontrol, Wind Effects, Dynamic Response, Numerical Control, Pointing Control Systems, Prototypes, Resonant Frequencies, Servomechanisms, Structural Design, Structural Vibration, Supports
Scientific paper
The prototype's mirror system will have a single full-size hexagonal mirror, a reference mirror, three displacement sensors, three whiffle trees, three actuators, and a radial support post. A spherical mirror two meters in diameter will be polished with a ten-meter radius of curvature. It is pointed out that the segment and reference will then be cut out of the two-meter mirror. Any warping of the pieces will be measured by comparing interferograms of the segment and reference with those of the original sphere. Three sensors mounted on the back of the mirrors will be used for measuring the displacement and tilt between the mirrors. The center sensor has its sensing area on the side opposite that of the outside sensors. The tilt is obtained from the product of the moment arm and the displacement between the sensors. Interferometric measurements at the focal point will be used to assess the ability of the control system to maintain the optical alignment of the mirror and reference.
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