Rapid Fabrication Of Large Aspheric Optics

By combining efficient fabrication processes and advanced testing methods, a real production capability exists for the manufacture of large aspheric optics. Currently, a five-axis, computer-controlled optical surfacing (CCOS) unit is used for the rapid grinding and polishing of elements up to 4-m in size. This paper describes the processes and equipment in use today and concludes with a scenario for meeting the projected future fabrication needs.