Rules for Optical Metrology
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Rules for Optical Metrology
Wed, 11/06/2014 - 10:30
Location:
Speaker:
Dr. H. Philip Stahl
Affiliation:
Senior Optical Physicist, NASA Marshall Space Flight Center
Synopsis:
Optical testing is the discipline of quantifying the performance parameters of an optical component or system using any appropriate metrology tool. Based on 30 years of testing experience, he has defined seven guiding principles: Fully Understand the Task; Develop an Error Budget; Continuous Metrology Coverage; Know where you are; ‘Test like you fly’; Independent Cross-Checks; and Understand All Anomalies. These rules have been derived from his own failures and successes. And, these rules have been applied with great success to the in-process optical testing and final specification compliance testing of the James Webb Space Telescope (JWST) OTE mirrors.
Biography:
Dr. H. Philip Stahl is a Senior Optical Physicist at NASA Marshall Space Flight Center currently leading a study to mature mirror technologies for a new large aperture UV/Optical/IR telescope to replace Hubble. Previously, he was responsible for developing candidate primary mirror technologies for the James Webb Space Telescope.
Dr. Stahl is a leading authority in optical metrology, optical engineering, and phase-measuring interferometry. Many of the world's largest telescopes have been made with the aid of high-speed and infrared phase-measuring Interferometers developed by him. He is a Fellow of SPIE, past ICO Vice President and 2014 SPIE President. He earned his PhD in Optical Science at the University of Arizona in 1985.
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