Precision aspheric optics testing with SCOTS: a deflectometry approach

Peng Su; Manal Khreishi; Run Huang; Tianquan Su; James H. Burge

doi:10.1117/12.2020721

13 May 2013 Precision aspheric optics testing with SCOTS: a deflectometry approach

Peng Su, Manal Khreishi, Run Huang, Tianquan Su, James H. Burge

Proceedings Volume 8788, Optical Measurement Systems for Industrial Inspection VIII; 87881E (2013) https://doi.org/10.1117/12.2020721
Event: SPIE Optical Metrology 2013, 2013, Munich, Germany

Abstract

Absolute measurement with SCOTS/deflectometry is a calibration problem. We use a laser tracker to calibrate the test geometry. The performance id demonstrated with the initial measurement results from the Large Synoptic Survey Telescope tertiary mirror. Systematic errors from the camera are carefully controlled. Camera pupil imaging aberration is removed with an external aperture stop. Imaging aberration and other inherent errors are suppressed with a rotation test. Results show that the SCOTS can act as a large dynamic range, high precision, non-null test method for precision aspheric optics. The SCOTS test can achieve measurement accuracy comparable with the traditional interferometric testing.

Citation Download Citation

Peng Su, Manal Khreishi, Run Huang, Tianquan Su, and James H. Burge "Precision aspheric optics testing with SCOTS: a deflectometry approach", Proc. SPIE 8788, Optical Measurement Systems for Industrial Inspection VIII, 87881E (13 May 2013); https://doi.org/10.1117/12.2020721

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