Iterative surface construction for blind deflectometry

Wenchuan Zhao; Logan R. Graves; Run Huang; Weihong Song; DaeWook Kim

doi:10.1117/12.2243264

27 September 2016 Iterative surface construction for blind deflectometry

Wenchuan Zhao, Logan R. Graves, Run Huang, Weihong Song, DaeWook Kim

Proceedings Volume 9684, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment; 96843X (2016) https://doi.org/10.1117/12.2243264
Event: Eighth International Symposium on Advanced Optical Manufacturing and Testing Technology (AOMATT2016), 2016, Suzhou, China

Abstract

Freeform optics provide excellent performance for a wide variety of applications. However, obtaining an accurate freeform surface measurement is highly challenging due to its large aspheric/freeform departure. It has been proven that SCOTS (Software Configurable Optical Test System), an advanced deflectometry system developed at the University of Arizona, can measure the departure of a freeform surface from the desired shape with nanometer accuracy. Here, a new data processing technique was used to measure a freeform surface without any prior knowledge of the shape of the surface. Knowing only the geometry of one point on the test surface, this method can take a blind measurement of a freeform surface and arrive at the true surface through iterative construction.

Citation Download Citation

Wenchuan Zhao, Logan R. Graves, Run Huang, Weihong Song, and DaeWook Kim "Iterative surface construction for blind deflectometry", Proc. SPIE 9684, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 96843X (27 September 2016); https://doi.org/10.1117/12.2243264

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