Automated figuring and polishing of replication mandrels for x-ray telescopes

Details Automated figuring and polishing of replication mandrels for x-ray telescopes Automated figuring and polishing of replication mandrels for x-ray telescopes

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.td02...21w&link_type=abstract

Medical Imaging 2003: Image Perception, Observer Performance, and Technology Assessment. Edited by Chakraborty, Dev P.; Krupins

Computer Science

Performance

Scientific paper

In support of the Constellation X mission the Optics Branch at Goddard Space Flight Center is developing technology for precision figuring and polishing of mandrels used to produce replicated mirrors that will be used in X-Ray telescopes. Employing a specially built machine controlled in 2 axes by a computer, we are doing automated polishing/figuring of 15 cm long, 20 cm diameter cylindrical, conical and Wolter mandrels. A battery of tests allow us to fully characterize all important aspects of the mandrels, including surface figure and finish, mid-frequency errors, diameters and cone angle. Parts are currently being produced with surface roughnesses at the 0.4nm RMS level, and half-power diameter 0.6 arcseconds.

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