Physics – Optics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982spie..332..141w&link_type=abstract
IN: International Conference on Advanced Technology Optical Telescopes, Tucson, AZ, March 11-13, 1982, Proceedings (A83-30976 13
Physics
Optics
3
Radiation Detectors, Reflecting Telescopes, Schmidt Telescopes, Spaceborne Telescopes, Ultraviolet Astronomy, Ultraviolet Telescopes, Cameras, Electronography, Far Ultraviolet Radiation, Focusing, Graphite-Epoxy Composites, Long Duration Space Flight, Magnetic Control, Optics, Pointing Control Systems, Radiation Shielding, Wide Angle Lenses
Scientific paper
The complete survey takes in 3627 fields, each 4.87 deg in diameter, arranged in a hexagonal pattern superimposed on the celestial equatorial coordinate system. The declination bands are spaced every 3 deg, 20 min. The optical instrument is a folded all-reflecting Schmidt system with an aperture of 0.74 m, a focal length of 2.0 m (f/2.7), a circlar field with a diameter of 4.87 deg, and a limiting image diameter of less than 2 arcsec over the entire field. The detector is an electrographic camera having a photocathode diameter of 170 mm. In discussing the telescope structure, it is pointed out that the optical support system is to be of graphite-epoxy construction. The focal tolerance (the most critical optical tolerance) is to be + or - 12 microns. Regarding contamination control, it is expected that with appropriate design it will be possible to operate in sunlight for observations in a restricted portion of the sky, at least more than 90 deg from the sun, depending on the geometry and reflectivity of the platform or spacecraft configuration.
Carruthers George R.
Henize Karl G.
Smith Jeffrey H.
Wray James D.
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