Disassembling the blackbody

Here's some pics illustrating how the blackbody source can be taken apart.

The lens barrel:

The barrel is in two pieces, threaded together to allow adjustment of the length. Adjusted by MJR for best BB illumination before CD17. I measured the gap between interlocking barrels at the threads to be 0.0925", with calipers.

The lens is held in with delrin spacer and a brass ring with "Torq-set" screws. Easy enough to remove with large phillips head drivers, but here's the description of these screw heads anyway:
http://www.phillips-screw.com/torq-set.php
(we don't have this tool)

Once the retaining ring was removed, the lens did not want to fall forward so I needed to unscrew the rear of the barrel from the copper block.

There's 6 "torq-set" screws that go through the large copper block. The stand with the cables needs to be unmounted from the base in order to access these screws. Screw heads are smaller and wouldn't turn with phillips head drivers - but we have one torq-set driver piece that works on them.

Here you see the small black copper plate that is our blackbody source.

UPDATE: On Fri Oct 28, we add a new position: black foam. Taped to the inside of the cal source cover.  The GUI already has a position called "Gas cell" that sends the turn table so that the small fold points to -45 deg.