The team has completed a preliminary design for the primary mirror mount. The design utilizes a floating 9 point mount composed of three brackets with "V" grooves underneath. The brackets interface with the existing holes on the open back of the light-weighted primary and exactly constrain the primary mirror. The PM mount will have 3 differential screws allowing for tip / tilt and piston adjustments.
The optical tube assembly with the PM mount attached to the hexagonal PM casing.
An isometric view of the top of the PM mount. The three cylinders protruding from the sides are meant to interface with three V grooves on the bottom of the hexagonal casing. This kinematic constraint allows for repeatable mounting and demounting of the primary mirror.
The PM mount as viewed from underneath.
-Joni
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