DCATT dispersed fringe sensor: modeling and experimenting with the transmissive phase plates

Details DCATT dispersed fringe sensor: modeling and experimenting with the transmissive phase plates DCATT dispersed fringe sensor: modeling and experimenting with the transmissive phase plates

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4013..757s&link_type=abstract

Proc. SPIE Vol. 4013, p. 757-762, UV, Optical, and IR Space Telescopes and Instruments, James B. Breckinridge; Peter Jakobsen; E

Physics

Scientific paper

Control algorithms developed for coarse phasing the segmented mirrors of the Next Generation Space Telescope (NGST) are being tested in realistic modeling and on the NGST wavefront control testbed, also known as DCATT. A dispersed fringe sensor (DFS) is used to detect piston errors between mirror segments during the initial coarse phasing. Both experiments and modeling have shown that the DFS provides an accurate measurement of piston errors over a range from just under a millimeter to well under a micron.

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