Shown is a 1.3 x 0.5 meter blank in the furnace after slumping. This optic is the primary for the OHS spectrograph currently in operation as part of the 8.2 meter Subaru telescope instrumentation atop Mona Kea, Hawaii.
The photo shows the OHS instrument and team. The lightweight HEXTEK mirror can be seen at the far end of the instrument.(Photo courtesy Univeristy of Kyoto.)