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Old 12-02-2020, 10:51 PM
gary
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Join Date: Apr 2005
Location: Mt. Kuring-Gai
Posts: 5,999
One of the Keck mirror cells inside the mirror lab at Waimea. The mirror
is face down and the complex of levers and actuators can be seen.
An adhesive whose performance had been non-optimal was painstakingly
replaced on the back of each cell where it interfaces with the levers.
A multi-year exercise now nearing completion for the twin 10 metre
telescopes, 72 segments in all.

A schematic of the back of a Keck mirror segment.

Inside the Keck mechanical engineering test lab with actuators on self levelling
workbenches.

Closeup of a Keck actuator.
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