HUT Observatory

Recoating Yerkes 1-Meter Reflector

Chamber used for 41-inch

This huge vacuum chamber, with its door removed at right, was used to re-coat the 41-inch-diameter Cervit mirror from the Yerkes reflecting telescope.

In 2012, J. W. Briggs traveled several times to assist Yerkes Observatory of University of Chicago for a long-overdue re-aluminization  of the 1967 Warner & Swasey 40-inch reflector.  The physical diameter of the Cervit primary in this telescope is 41 inches, so it’s generally called the “41-inch,” to differentiate it from the much older 40-inch refractor also at Yerkes.  The photos below show parts of the effort, including the huge chamber at the

The 41-inch mirror has been stripped of its old coating and carefully cleaned before going into the vacuum chamber.

The 41-inch mirror has been stripped of its old coating and carefully cleaned before going into the vacuum chamber.

FLABEGcoating facility in Brackenridge, Pennsylvania.  A sudden breakdown in the elevating floor under the 41-inch telescope complicated and delayed reassembly efforts, which were completed mainly by dedicated Yerkes in-house staff.