Physics – Optics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103.1296a&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, Dec. 1991, p. 1296-1313. Research supported by Uni
Physics
Optics
7
Cameras, Cassegrain Optics, Charge Coupled Devices, Focal Plane Devices, Telescopes, Astronomical Observatories, Design Analysis, Performance Prediction
Scientific paper
This paper describes the design and performance of the OREAD focal-reducing camera, constructed for use at the Cassegrain focus of the Michigan-Dartmouth-MIT Observatory McGraw-Hill 1.3-meter telescope. OREAD is an all-refractive optical system providing a 50-mm collimated beam suitable for commercially available narrow-band filters or grisms. Its collimator and field lens are custom-made to decrease the severe coma which would otherwise be present at the extremities of its 30-arc-min field. When used with a CCD such as the TI 800 x 800, OREAD provides a field of view of 0.1 square degree at 1.5 arcsec/pixel. The focal ratio of OREAD of f/1.63 allows sky-limited narrow-band images to be obtained with exposures of only moderate duration. In an Appendix, some limitations inherent in coarsely sampled data obtained with CCDs are examined.
Aldering Gregory Scott
Bothun Gregory D.
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