Balancing measurement time and uncertainty when stitching in production environments

Gary DeVries; Paul E. Murphy

doi:10.1117/12.719818

14 May 2007 Balancing measurement time and uncertainty when stitching in production environments

Gary DeVries, Paul E. Murphy

Proceedings Volume 10316, Optifab 2007: Technical Digest; 103160U (2007) https://doi.org/10.1117/12.719818
Event: Optifab 2007, 2007, Rochester, New York, United States

Abstract

Long measurement times can be a bottleneck in an optics production environment. Ideally the measurement time will be quicker than polishing times. Large aperture and high precision parts, however, tend toward slower measurement times. Additionally, such parts usually need dedicated and expensive test setups. In 2004, QED Technologies introduced the Subaperture Stitching Interferometer (SSI®) to automatically stitch spherical surfaces (including hemispheres) up to 280 mm. The system also reduces measurement uncertainty with in-line calibration of systematic errors. With stitching, measurement time is a variable that can impact measurement uncertainty. The user can control such parameters as lattice design, systematic error calibration, and acquisition speed to optimally balance measurement speed and quality. We empirically demonstrate the trade-offs between measurement uncertainty and cycle time on the SSI.

Citation Download Citation

Gary DeVries and Paul E. Murphy "Balancing measurement time and uncertainty when stitching in production environments", Proc. SPIE 10316, Optifab 2007: Technical Digest, 103160U (14 May 2007); https://doi.org/10.1117/12.719818

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