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Camera block,
after holes bored, top peaked, and bottom F/17 bay opened up. the
bore holes, are, from bottom to top, the F/5 camera path, the F/17
camera path, and the pupil viewer camera path. |
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Underside view
of camera block. The F/17 dogleg bore holes are just visible. They
allow the much longer F/17 camera path to be folded using four mirrors
into the camera block space. |
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View from bottom
of Camera block to show bore holes for F/17 folded beam path. Inside
the bore holes are flat reference surfaces against which lens cells
are mounted. Inside all the bore holes, anti-reflection "rifled"
baffle tubes are snugly fit. These control stray light in this confined
beam path. |
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THK lead screw
drive system (aka "rail") mounted to the bottom of the camera
bay in the filter box. The two rectangular aluminum bars under the
THK rail hold the ball bearings and sockets comprising a 3-point kinematic
mount. The square aluminum plate on top of the rail is bolted to the
two "cars" that ride the rail (one car captures the screw,
one car is free of the screw). This plate also has sockets for a 3-point
kinematic mount |
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