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 been working in the optical engineering field for more than 15 years, including NASA Aspera UV space telescope mission, 25 m diameter Giant Magellan Telescope, and commercial Augmented Reality freeform glass project. His main research area covers precision freeform optics design, fabrication, and various metrology topics, such as interferometric test systems using computer-generated hologram, wavefront curvature measurement, and dynamic deflectometry system. For the past 10 years, Daewook has been chairing conference programs including the Optical Manufacturing and Testing conference (SPIE), Optical Fabrication and Testing conference (OSA), and the Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems conference (SPIE). He is also teaching the SPIE Optical Testing Short Courses. He has published more than 150 journal/conference papers and served as an associate editor for the Optics Express journal for 7 years. He gave more than 20 plenary, keynote, colloquium talks at various international conferences and universities. Prof. Kim is an SPIE Fellow. Event: SPIE Astronomical Telescopes + Instrumentation 2022 Course Held: 17 July 2022