Other
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.209..587w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 209, Aug. 1, 1984, p. 587-606.
Other
3
Astronomical Photography, Design Analysis, Telescopes, Baffles, Mirrors, Misalignment, Schmidt Cameras
Scientific paper
The optical quality of the Couder telescope has recently been shown to be comparable to that of the Schmidt camera, giving images smaller than 0.5 arcsec in diameter at f/3 over a field 3-deg in diameter in its original form, and if its design is modified the aperture can be increased to f/2.5 (or even f/2) with images under 0.4 arcsec over 3.6-deg (or 1 arcsec over 4.5-deg). The present paper describes the method of designing an f/1.5 modified Couder telescope that gives images smaller than 1 arcsec over a field of 2-deg. Other details of this and the f/2 and f/2.5 systems are discussed, including the design of sky fog baffles, vignetting and the non-uniformity of illumination across the field, the sensitivity of the image quality to misalignment, and the properties of the system in terms of Burch's method of plate-diagram analysis.
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