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Deep in the bowels of the Optics Building on the campus of The University of Alabama in Huntsville, there exists a large Plexiglass enclosure, a whirling polishing head swirls over a glass mirror, methodically polishing the surface. A controlled stream of abrasive slurry plays constantly on the surface being polished and the computer controlled polishing bonnet, forming a halo as it is thrown off by polish head spinning at up to 2,000 rpm. This is the polish head of the Zeeko IRP-600X in action. It is capable of shaping free-form optical surfaces in virtually any material that can be polished: glass, metals, even many composites, says Dr. Pat Reardon, UAHuntsville's Center for Applied Optics (CAO) Interim Director and principal research scientist.

The sophisticated machine is rare enough - there are only four or five others in the entire U.S. But it will allow the center to create optical devices of greater size and quality than it could develop before, and that could have major implications for UAH-CAO ability to support research for both the public and private sectors. "This gives us the ability to collaborate more with Marshall Space Flight Center," Reardon says, adding that it could also be used to produce optical devices for optical firms that need occasional large-scale mirrors, lenses or other items.

In fact, the operator has control over a minimum seven polishing variables, and Reardon says that amount of control can be daunting. "The power of the Zeeko system is that you have so many variables available to optimize the polishing process. But the challenge is also that you have so many variables available to select the polishing process," he said.

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"Basically, if you can find the right abrasive, it can be applied by the Zeeko," he says. Surfaces can be large, up to 600 millimeters (24") in diameter and 450 millimeters (18") in height.

The Zeeko robotic polisher is the newest, and perhaps most impressive, device at the center. Size alone seems to make "impressive" a fitting adjective. Standing nine feet tall and almost as wide and deep, the massive Zeeko tips the scales at nearly 17,000 pounds.Totally computer controlled, the Zeeko polisher can be programmed to select the exact type of polishing motion, as well as polish pressure, distance and direction of attack, Reardon explains.

Reardon says the polisher will allow UAH-CAO to support local, regional, and national teams in the fabrication of complex optical systems. It will also extend the center's research efforts in optical fabrication process development, optical testing, and optical design.