Modern Optical Testing

Level: Intermediate Length: 4 hours Format: In-Person Lecture Intended Audience: Engineers and technical managers who are involved with the construction, analysis or use of optical systems will find this material useful. Description: This course describes the basic interferometry techniques used in the evaluation of optical components and optical systems. It discusses interferogram interpretation, computer analysis, and phase-shifting interferometry, as well as various commonly used wavefront-measuring interferometers. The instructor describes specialized techniques such as testing windows and prisms in transmission, 90-degree prisms and corner cubes, measuring index inhomogeneity, and radius of curvature. Testing cylindrical and aspheric surfaces, determining the absolute shape of flats and spheres, and the use of infrared interferometers for testing ground surfaces are also discussed. The course also covers state-of-the-art direct phase measurement interferometers. Learning Outcomes: This course will enable you to: - discuss state-of-the-art direct phase-measurement interferometers - determine if an optics supplier can actually supply the optics you are ordering - test flat and spherical surfaces - better specify optical components and systems - test ground and aspheric surfaces - make absolute measurements - evaluate optical system performance - explain basic interferometry and interferometers for optical testing - analyze interferograms - produce higher-quality optical systems Instructor(s): Daewook Kim is an associate professor of Optical Sciences and Astronomy at the University of Arizona. He has devoted his efforts to a multitude of space and ground-based large optical engineering projects. His primary research focuses on precision freeform optics design, fabrication, and various metrology topics, including interferometry and dynamic deflectometry. For over a decade, he has actively participated in various conference programs and short courses related to optics. His leadership includes chairing various conferences for SPIE and other societies. Kim's academic contributions include authoring over 300 journal/conference papers. His academic achievements have led to his recognition as an SPIE Fellow, and he was elected to the SPIE Board of Directors for the term spanning 2024 to 2026. Event: SPIE Photonics West 2025 Course Held: 29 January 2025