Greg Forbes

Senior Scientist, QED Technologies

Greg Forbes was on the faculty of the Institute of Optics at the University of Rochester for about ten years until the mid 1990s. He returned to Australia as a Research Professor in Physics at Macquarie University in Sydney. For the last ten years he has been Senior Scientist at QED Technologies. He lives in Sydney but regularly comes to visit and work with his colleagues and friends in Rochester.

FIGURE 1. Aspheric subaperture-stitching interferometry can be used to measure the surface figures of aspheres such as this ellipsoid (conic), which has a 100 mm aperture diameter, a base radius of -226 mm, and approximately 12 µm of aspheric departure. The asphere is fabricated from lightweighted silicon carbide with silicon cladding.

Optics

ASPHERIC OPTICS: Distributing aspheric surfaces brings down cost

Greg Forbes

Feb. 1, 2007

Distributed, mild aspheric surfaces and subaperture-stitching interferometry combine to form a cost-effective approach to fabricating aspheric optics.