Digital moire subtraction applied to interferometers as a means of improving accuracy and extending field of view for engineering and optical measurement

Colin Forno; Maurice Patrick Whelan

doi:10.1117/12.357806

17 August 1999 Digital moire subtraction applied to interferometers as a means of improving accuracy and extending field of view for engineering and optical measurement

Colin Forno, Maurice Patrick Whelan

Author Affiliations +

Proceedings Volume 3745, Interferometry '99: Applications; (1999) https://doi.org/10.1117/12.357806
Event: International Conference on Optical Metrology, 1999, Pultusk Castle, Poland

Abstract

Interferometers are used for routinely testing optical components and in engineering for the measurement of mechanical and thermal behavior of materials and components. Conventionally, for the most accurate measurements these interferometer systems are constructed from high-quality optical elements and include fine controls for precise alignment. In this new approach, all the errors of a poor quality, misaligned system are accepted then eliminated by a simple digital subtraction process. The method offers the possibility of devising very large aperture optical systems for traditional and engineering interferometers from inexpensive and basic components.

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Colin Forno and Maurice Patrick Whelan "Digital moire subtraction applied to interferometers as a means of improving accuracy and extending field of view for engineering and optical measurement", Proc. SPIE 3745, Interferometry '99: Applications, (17 August 1999); https://doi.org/10.1117/12.357806

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