Enabling high-performance optical fabrication with subaperture finishing and stitching interferometry

Commercially available sub-aperture polishing and measurement technologies have changed the landscape of precision optics manufacturing. Such developments have enabled the production of higher precision and more complex optics with increasingly difficult figure requirements. Magnetorheological Finishing (MRF®) is a production-proven, deterministic sub-aperture finishing method that overcomes many limitations of traditional polishing. Sub-aperture Stitching Interferometers (SSI®) extend the effective aperture, dynamic range, and accuracy of phase measuring interferometers by combining novel software and hardware. QED has pioneered these finishing and metrology techniques over the past decade. Some of the latest developments on how MRF and SSI may be combined to enable cost effective manufacturing of a wide range of precision optical surfaces will be presented.