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ARTICLE OF THE HOUR Dynamic Interferometry
Getting Rid of the Jitters
Mechanical vibration, moving parts and turbulent airflow present significant problems for most interferometric test methods. New techniques help solve the problem.Conditions on the factory floor and in industrial cleanrooms with high-capacity air filtration systems can hamper the use of interferometry. Another problem is the testing of large-aperture mirrors where it is difficult to mechanically isolate them and the structures needed to support the optical test; in addition, long optical paths...

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