Page 224 - Chalcogenide Glasses for Infrared Optics

200 Cha pte r Ei g h t

T T
Core E E
M M
Clad P P

Preset
counter
Drum
speed P Crucible pressurization
manifold
Traverse P
Layup traverse Core glass crucible & die
mechanism
Compumotor (computer
controlled) microstepper

Ovens Clad glass crucible & die

Laser diameter gauge

Split drum, diameter
releasing mechanism

Boston gear 10:1
reducer mounted
to a reliance
1.5-hp dc drive
motor with 60T
ring kit

Boston gear hd
pillow blocks, with
self-aligning sealed
bearings

FIGURE 8.15 Diagram of the AMI 10-m drum assembly.

would be virtually impossible to remove and handle a fragile 10-m
ribbon without severe fiber breakage. We decided the ribbons would
have to be made on the drum, one stacked and glued to the other
without being moved.
To accomplish this, we first obtained some extruded plastic channel
and glued it aligned to the surface of the drum one revolution with
the open end up. The flat surface inside was 8 mm wide, just right for
winding a 7-mm ribbon. Contrary to previous ribbon formation