Computer Science – Performance
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985spie..572..166v&link_type=abstract
IN: Infrared technology XI; Proceedings of the Meeting, San Diego, CA, August 20, 21, 1985 (A87-11020 01-35). Bellingham, WA, So
Computer Science
Performance
Infrared Telescopes, Rotating Mirrors, Space Infrared Telescope Facility, Wave Front Deformation, Deflection, Optimization, Performance Tests, Stiffness
Scientific paper
The finite element method was used to analyze the optical performance of the space Infrared Telescope Facility (SIRTF) used-silica secondary mirror as it is subjected to a dynamic chopping motion. The chopping motion was assumed to be of quasi-square wave form with the mirror stationary during a dwell period folliwng the actual chop rotation. The primary optical deformation was 'ringing' during the dwell period; damping during the dwell time (20 ms) was not effective. For a given chopping motion, the magnitude of the optical deflections could be reduced by proper choice of the support points, by increasing the stiffness of the mirror, reducing the magnitude of the chop angle, and/or increasing the chop period. Prescribed acceleration versus time during the chop motion affects the optical deformations as well. There are optimum support-point locations for each type of motion. Tapering the back of the secondary mirror does not significantly affect optical deformation provided that supports are located at the optimum points. For the best trade of mass moment of inertia against deformation, lightweight mirror geometries should be used.
Ditolla R.
Richard Ralph M.
Vukobratovich Daniel
No associations
LandOfFree
Dynamic optical deformations of a chopping secondary mirror does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dynamic optical deformations of a chopping secondary mirror, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic optical deformations of a chopping secondary mirror will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-928581