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Cold bench, with LN2 ring installed, after bead blasting and anodizing. |
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Detail, showing the LN2 ring and transition pieces. |
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Finer detail, with transition pieces. Note LN2 ring is welded into
slot in cold bulkhead. |
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Filter box, on returning from dip brazing (with one already anodized
cover). |
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Front view of brazed filter box (filter bay cover intentionally
askew), after bead blasting. |
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Inside view of filter bay of filter box, after brazing and bead
blasting. |
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Internal view of filter box after brazing and bead blasting. Note
that post-brazing, the filter box is a single integral element with
not moving or removeable parts. |
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Front oblique view of brazed, bead blasted filter box. |
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Side view of brazed, bead blasted filter box (and anodized camera
bay cover). Dimples on filter bay cover are brazed screw heads used
to secure filter bay cover to filter bay bulkhead tops. |
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POL wheel and unpopulated POL filter cell, held in place by shoulder
bearings and lever arm attached to flex-pivot. This system registers
the location of the HWP cell, while providing rotational freedom.
A gear is added to the cell to engage the drive gear of the HWP drive
system when in the optical beam. |
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POL cell being removed from POL wheel. The lever arm on the flex-pivot
moves enough to allow the cell to be easily removed, but holds the
cell tight when in place. |
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Overview of POL wheel, showing the six cell locations and hardware
for one cell holder. |