Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jass...18..239r&link_type=abstract
Journal of Astronomy and Space Science, vol. 18, no. 3, p. 239-248
Astronomy and Astrophysics
Astronomy
Interstellar Matter, Parabolic Cylinder Mirror, Far Ultraviolet
Scientific paper
Far-ultraviolet IMaging Spectrograph (FIMS) is the main payload of the first Korean scientific satellite, KAISTSAT-4, which will be launched in 2002. Among the optical parts, parabolic cylinder mirror does not have any heritage from previous astronomical missions, so the manufacturing and testing process itself is a challenging issue. We describe the method of manufacturing and measuring of the off-axis parabolic cylinder mirror and our initial experiments to establish the entire manufacturing process. Using the method, the profile error can meet the specification of ~λ per cm which is closely related with the astronomical performances. In case of the surface roughness, temperature controlled pitch polishing reduces Rq under 1 nm implying that scattering in the entire spectral range of FIMS is less than 2% of the incident UV light.
Edelstein José
Han Wei
Hong Jae Sub
Jin Hongying
Korpela Eric J.
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