The University of Hawaii Wide‐Field Imager (UHWFI)
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Abstract
ABSTRACT. The University of Hawaii Wide-Field Imager (UHWFI) is a focal compressor system designed to project the full half-degree field of the UH 2.2 m telescope onto the refurbished UH 8K # 8K CCD camera. The optics use Ohara glasses and are mounted in an oil-filled cell to minimize light loss and ghost images from the large number of internal lens surfaces. The UHWFI is equipped with a six-position filter wheel and a rotating sector blade shutter, both driven by stepper motors. The instrument saw first light in 2004 in an engineering mode. After filling the lens cell with index-matched oil, integrating all software components into the user interface, tuning the CCD performance, and purchasing the final filter set, the UHWFI is now fully commissioned at the UH 2.2 m telescope. 1.
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