Focal reducer/CCD detector system for the McDonald 2.1 M telescope

Details Focal reducer/CCD detector system for the McDonald 2.1 M telescope Focal reducer/CCD detector system for the McDonald 2.1 M telescope

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1235..263o&link_type=abstract

IN: Instrumentation in astronomy VII; Proceedings of the Meeting, Tucson, AZ, Feb. 13-17, 1990 (A91-29601 11-35). Bellingham, WA

Physics

Optics

1

Cassegrain Optics, Charge Coupled Devices, Reflecting Telescopes, Data Acquisition, Focusing, Image Resolution, Seeing (Astronomy)

Scientific paper

A focal reducer which converts the f/13.5 primary Cassegrain beam of the McDonald 2.1 m telescope to f/3.0 is described. The resulting plate scale is 30 microns/arcsec, which is a good match to the resolution of typical CCDs for seeing conditions of about 1 arcsec. The present system uses a SID501 RCA CCD with 30-micron pixels; however, a TI 800 x 800 CCD with 15-micron pixels and other low-noise, small pixel devices will be used eventually. The focal reducer uses primarily reflective optics to provide good sensitivity down to the atmospheric cutoff at 3100A.

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